Powered by Deep Web Technologies
Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

AIAA-982909 Characterization of the Near Wake of a Helicopter Rotor*  

E-Print Network [OSTI]

of Technology. Abstract Vortex characteristics in the near wake of a 2-bladed teetering rotor in steady forward to be repeatable to within 1° of rotor revolution. Velocity was measured in the planes intersected by the rotor-blade blade side of the rotor. The axial velocity in all cases is wake-like, being directed towards the blade

2

Revolution Now  

Broader source: Energy.gov (indexed) [DOE]

Revolution Now Revolution Now The Future Arrives for Four Clean Energy Technologies September 17, 2013 Lead author Dr. Levi Tillemann, Special Advisor for Policy and International Affairs Contributors Fredric Beck, DOE Wind Technology Program Dr. James Brodrick, DOE Solid-State Lighting Program Dr. Austin Brown, DOE National Renewable Energy Laboratory David Feldman, DOE National Renewable Energy Laboratory Tien Nguyen, DOE Fuel Cells Technology Office Jacob Ward, DOE Vehicles Technology Program Gaining Force ................................................................................................................................................ 1 U.S. Land-Based Wind Power ........................................................................................................................ 2

3

Separators for flywheel rotors  

DOE Patents [OSTI]

A separator forms a connection between the rotors of a concentric rotor assembly. This separator allows for the relatively free expansion of outer rotors away from inner rotors while providing a connection between the rotors that is strong enough to prevent disassembly. The rotor assembly includes at least two rotors referred to as inner and outer flywheel rings or rotors. This combination of inner flywheel ring, separator, and outer flywheel ring may be nested to include an arbitrary number of concentric rings. The separator may be a segmented or continuous ring that abuts the ends of the inner rotor and the inner bore of the outer rotor. It is supported against centrifugal loads by the outer rotor and is affixed to the outer rotor. The separator is allowed to slide with respect to the inner rotor. It is made of a material that has a modulus of elasticity that is lower than that of the rotors. 10 figs.

Bender, D.A.; Kuklo, T.C.

1998-07-07T23:59:59.000Z

4

Separators for flywheel rotors  

DOE Patents [OSTI]

A separator forms a connection between the rotors of a concentric rotor assembly. This separator allows for the relatively free expansion of outer rotors away from inner rotors while providing a connection between the rotors that is strong enough to prevent disassembly. The rotor assembly includes at least two rotors referred to as inner and outer flywheel rings or rotors. This combination of inner flywheel ring, separator, and outer flywheel ring may be nested to include an arbitrary number of concentric rings. The separator may be a segmented or continuous ring that abuts the ends of the inner rotor and the inner bore of the outer rotor. It is supported against centrifugal loads by the outer rotor and is affixed to the outer rotor. The separator is allowed to slide with respect to the inner rotor. It is made of a material that has a modulus of elasticity that is lower than that of the rotors.

Bender, Donald A. (Dublin, CA); Kuklo, Thomas C. (Oakdale, CA)

1998-01-01T23:59:59.000Z

5

Revolution in Detection Affairs  

SciTech Connect (OSTI)

The detection of nuclear or radioactive materials for homeland or national security purposes is inherently difficult. This is one reason detection efforts must be seen as just one part of an overall nuclear defense strategy which includes, inter alia, material security, detection, interdiction, consequence management and recovery. Nevertheless, one could argue that there has been a revolution in detection affairs in the past several decades as the innovative application of new technology has changed the character and conduct of detection operations. This revolution will likely be most effectively reinforced in the coming decades with the networking of detectors and innovative application of anomaly detection algorithms.

Stern W.

2013-11-02T23:59:59.000Z

6

Aerodynamik des Rotors  

Science Journals Connector (OSTI)

Der Rotor steht am Anfang der Wirkungskette einer Windkraftanlage. Seine aerodynamischen und dynamischen Eigenschaften sind deshalb in mehrfacher Hinsicht prägend für das gesamte System. Die Fähigkeit des Roto...

Dipl.-Ing. Erich Hau

2003-01-01T23:59:59.000Z

7

Aerodynamik des Rotors  

Science Journals Connector (OSTI)

Der Rotor steht am Anfang der Wirkungskette einer Windkraftanlage. Seine aerodynamischen und dynamischen Eigenschaften sind deshalb in mehrfacher Hinsicht prägend für das gesamte System. Die Fähigkeit des Roto...

2008-01-01T23:59:59.000Z

8

Revolutionen i Egypten; The Revolution in Egypt.  

E-Print Network [OSTI]

?? This study examines whether social media had an influence on the revolution in Egypt. Social media was an important tool for the revolution since… (more)

Stamm'ler Jaliff, Pernilla

2011-01-01T23:59:59.000Z

9

Revolution Now | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Revolution Now Revolution Now Revolution Now Policies and investments to support emerging clean energy technology are a cornerstone of the Energy Department's work to advance the energy economy of tomorrow. Thanks to decades of these policies and investments, the clean energy future has already arrived for four key technologies: wind turbines, solar panels, electric vehicles and LED light bulbs, each of which has seen drops in cost and growth in consumer demand over the past four years. Revolution Now: The Future Arrives for Four Clean Energy Technologies tells the story of how these four technologies successfully crossed "the valley of death" -- what entrepreneurs commonly call the gap between research and wide-scale deployment -- and joined a burgeoning consumer market for

10

THE NUCLEAR ENERGY REVOLUTION—1966  

Science Journals Connector (OSTI)

...nuclear energy revolution-1966. | Oak Ridge National Laboratory. | Journal...ALVIN MI. WEINBERG AND GALE YOUNG OAK RIDGE NATIONAL LABORATORYt Delivered before...have passed since Fermi and his co-workers at Chicago achieved the first...

Alvin M. Weinberg; Gale Young

1967-01-01T23:59:59.000Z

11

Revolution Environmental | Open Energy Information  

Open Energy Info (EERE)

Revolution Environmental Revolution Environmental Jump to: navigation, search Name Revolution Environmental Place Chicago, Illinois Zip 60654 Sector Efficiency, Services Product Chicago-based firm that provides a range of environmental related services such as energy efficiency and electrical vehicle infrastructure. Coordinates 41.88415°, -87.632409° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":41.88415,"lon":-87.632409,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

12

Revolution in nuclear detection affairs  

SciTech Connect (OSTI)

The detection of nuclear or radioactive materials for homeland or national security purposes is inherently difficult. This is one reason detection efforts must be seen as just one part of an overall nuclear defense strategy which includes, inter alia, material security, detection, interdiction, consequence management and recovery. Nevertheless, one could argue that there has been a revolution in detection affairs in the past several decades as the innovative application of new technology has changed the character and conduct of detection operations. This revolution will likely be most effectively reinforced in the coming decades with the networking of detectors and innovative application of anomaly detection algorithms.

Stern, Warren M. [Nonproliferation and National Security Department, Brookhaven National Laboratory, Upton, New York (United States)

2014-05-09T23:59:59.000Z

13

IT Revolution in Learning Technology Riichiro Mizoguchi  

E-Print Network [OSTI]

IT Revolution in Learning Technology Riichiro Mizoguchi The Institute of Scientific and Industrial@ei.sanken.osaka-u.ac.jp Introduction The change has already begun. It is not a simple change but a Revolution in the sense of speed and its impact. It is called IT(Information Technology) revolution and has been giving great impacts

Mizoguchi, Riichiro

14

Post-industrial-revolution HCI Colin Johnson  

E-Print Network [OSTI]

Post-industrial-revolution HCI Colin Johnson University of Kent Computing Laboratory Canterbury is akin to the state of manufacturing prior to the industrial revolution. It is suggested that eventually an industrial revolution will occur in programming through the use of automated program generation tools, which

Kent, University of

15

Polygonal shaft hole rotor  

DOE Patents [OSTI]

A laminated rotor for an induction motor has a plurality of ferro-magnetic laminations mounted axially on a rotor shaft. Each of the plurality of laminations has a central aperture in the shape of a polygon with sides of equal length. The laminations are alternatingly rotated 180.degree. from one another so that the straight sides of the polygon shaped apertures are misaligned. As a circular rotor shaft is press fit into a stack of laminations, the point of maximum interference occurs at the midpoints of the sides of the polygon (i.e., at the smallest radius of the central apertures of the laminations). Because the laminates are alternatingly rotated, the laminate material at the points of maximum interference yields relatively easily into the vertices (i.e., the greatest radius of the central aperture) of the polygonal central aperture of the next lamination as the shaft is inserted into the stack of laminations. Because of this yielding process, the amount of force required to insert the shaft is reduced, and a tighter fit is achieved.

Hussey, John H. (St. Louis, MO); Rose, John Scott (Alton, IL); Meystrik, Jeffrey J. (Webster Groves, MO); White, Kent Lee (Maryland Heights, MO)

2001-01-23T23:59:59.000Z

16

Single rotor turbine engine  

DOE Patents [OSTI]

There has been invented a turbine engine with a single rotor which cools the engine, functions as a radial compressor, pushes air through the engine to the ignition point, and acts as an axial turbine for powering the compressor. The invention engine is designed to use a simple scheme of conventional passage shapes to provide both a radial and axial flow pattern through the single rotor, thereby allowing the radial intake air flow to cool the turbine blades and turbine exhaust gases in an axial flow to be used for energy transfer. In an alternative embodiment, an electric generator is incorporated in the engine to specifically adapt the invention for power generation. Magnets are embedded in the exhaust face of the single rotor proximate to a ring of stationary magnetic cores with windings to provide for the generation of electricity. In this alternative embodiment, the turbine is a radial inflow turbine rather than an axial turbine as used in the first embodiment. Radial inflow passages of conventional design are interleaved with radial compressor passages to allow the intake air to cool the turbine blades.

Platts, David A. (Los Alamos, NM)

2002-01-01T23:59:59.000Z

17

Homopolar motor with dual rotors  

DOE Patents [OSTI]

A homopolar motor has a field rotor mounted on a frame for rotation in a first rotational direction and for producing an electromagnetic field, and an armature rotor mounted for rotation on said frame within said electromagnetic field and in a second rotational direction counter to said first rotational direction of said field rotor. The two rotors are coupled through a 1:1 gearing mechanism, so as to travel at the same speed but in opposite directions. This doubles the output voltage and output power, as compared to a motor in which only the armature is rotated. Several embodiments are disclosed. 7 figs.

Hsu, J.S.

1998-12-01T23:59:59.000Z

18

Sandia National Laboratories: National Rotor Testbed  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

National Rotor Testbed (NRT) includes research to quantify the degree to which the blade design load distribution influences the rotor near- and mid-wake velocity deficits and...

19

Sandia National Laboratories: National Rotor Testbed Functional...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

"Definition of the National Rotor Testbed: An Aeroelastically Relevant Research-Scale Wind Turbine Rotor." Approximately 60 researchers from various institutions and countries...

20

SMART Wind Turbine Rotor: Design and Field Test  

Broader source: Energy.gov [DOE]

Design and field test results from the SMART Rotor project, a wind turbine rotor with integrated trailing-edge flaps designed for active control of the rotor aerodynamics.

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

SMART Wind Turbine Rotor: Data Analysis and Conclusions  

Broader source: Energy.gov [DOE]

Data analysis and conclusions from the SMART Rotor project, a wind turbine rotor with integrated trailing-edge flaps designed for active control of the rotor aerodynamics.

22

A novel rotor position estimation approach for an 8/6 solid rotor switched reluctance motor  

Science Journals Connector (OSTI)

Switched reluctance motor (SRM) is becoming popular due to its simple construction, low manufacturing cost, ruggedness and fault-tolerant capability. In conventional switched reluctance motor (SRM), rotor is laminated. But in solid rotor switched reluctance ... Keywords: Artificial neural network, Rotor position estimation, Solid rotor switched reluctance motor, Two-phase excitation

L. Jessi Sahaya Shanthi; R. Arumugam; Y. K. Taly

2012-04-01T23:59:59.000Z

23

Probabilistic analysis of meanline compressor rotor performance  

E-Print Network [OSTI]

This thesis addresses variability in aerodynamic performance of a compressor rotor due to geometric variation. The performance of the rotor is computed using a meanline model that includes the effect of tip clearance ...

Fitzgerald, Nathan Andrew, 1980-

2004-01-01T23:59:59.000Z

24

Turbomachine rotor with improved cooling  

DOE Patents [OSTI]

A gas turbine rotor has an essentially closed loop cooling air scheme in which cooling air drawn from the compressor discharge air that is supplied to the combustion chamber is further compressed, cooled, and then directed to the aft end of the turbine rotor. Downstream seal rings attached to the downstream face of each rotor disc direct the cooling air over the downstream disc face, thereby cooling it, and then to cooling air passages formed in the rotating blades. Upstream seal rings attached to the upstream face of each disc direct the heated cooling air away from the blade root while keeping the disc thermally isolated from the heated cooling air. From each upstream seal ring, the heated cooling air flows through passages in the upstream discs and is then combined and returned to the combustion chamber from which it was drawn. 5 figs.

Hultgren, K.G.; McLaurin, L.D.; Bertsch, O.L.; Lowe, P.E.

1998-05-26T23:59:59.000Z

25

Turbomachine rotor with improved cooling  

DOE Patents [OSTI]

A gas turbine rotor has an essentially closed loop cooling air scheme in which cooling air drawn from the compressor discharge air that is supplied to the combustion chamber is further compressed, cooled, and then directed to the aft end of the turbine rotor. Downstream seal rings attached to the downstream face of each rotor disc direct the cooling air over the downstream disc face, thereby cooling it, and then to cooling air passages formed in the rotating blades. Upstream seal rings attached to the upstream face of each disc direct the heated cooling air away from the blade root while keeping the disc thermally isolated from the heated cooling air. From each upstream seal ring, the heated cooling air flows through passages in the upstream discs and is then combined and returned to the combustion chamber from which it was drawn.

Hultgren, Kent Goran (Winter Park, FL); McLaurin, Leroy Dixon (Winter Springs, FL); Bertsch, Oran Leroy (Titusville, FL); Lowe, Perry Eugene (Oviedo, FL)

1998-01-01T23:59:59.000Z

26

Industrial Revolutions: a graduate seminar Seminar in History of Technology  

E-Print Network [OSTI]

Industrial Revolutions: a graduate seminar HSci 8930 Seminar in History of Technology Jennifer K the question: Was there an Industrial Revolution? Historians have been discussing the Industrial Revolution of industrial revolution itself. This reassessment includes renewed attention to the scientific and technical

Janssen, Michel

27

Quiet Revolution Ltd | Open Energy Information  

Open Energy Info (EERE)

Product: Quiet Revolution, a spin off company of XCO2 Ltd, have developed a vertical axis wind turbine. The patent pending design is being installed into many buildings in the...

28

Shadow Geometry for Solids of Revolution  

Science Journals Connector (OSTI)

In this chapter, we explore the analysis of shadows of Right Circular SHGCs (solids of revolution). We have already seen that, when the viewing angle ? is known, the tangency contours themselves can be analyze...

Steven A. Shafer

1985-01-01T23:59:59.000Z

29

Wind Revolutions LLC | Open Energy Information  

Open Energy Info (EERE)

Revolutions LLC Revolutions LLC Jump to: navigation, search Name Wind Revolutions LLC Place Denver, Colorado Zip 80202 Sector Wind energy Product Wind Revolutions is a wind energy project developer with three projects currently under development in Wyoming and three other projects in early stages in California, New Mexico, and Arizona. Coordinates 39.74001°, -104.992259° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":39.74001,"lon":-104.992259,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

30

Radial-Radial Single Rotor Turbine  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Radial-Radial Single Rotor Turbine Radial-Radial Single Rotor Turbine Radial-Radial Single Rotor Turbine A rotor for use in turbine applications. Available for thumbnail of Feynman Center (505) 665-9090 Email Radial-Radial Single Rotor Turbine A rotor for use in turbine applications has a radial compressor/pump having radially disposed spaced apart fins forming passages and a radial turbine having hollow turbine blades interleaved with the fins and through which fluid from the radial compressor/pump flows. The rotor can, in some applications, be used to produce electrical power. U.S. Patent No.: 7,044,718 (DOE S-100,626) Patent Application Filing Date: July 8, 2003 Patent Issue Date: May 16, 2006 Licensing Status: Available for Express Licensing (?). View terms and a sample license agreement.

31

New Years Revolutions | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

New Years Revolutions New Years Revolutions New Years Revolutions January 3, 2012 - 9:42am Addthis Drew Bittner Web Manager, Office of Energy Efficiency and Renewable Energy Happy New Year to all you Energy Savers out there! Now that 2012 calendars are up and we (hopefully) remember to use '12 instead of '11 where necessary (does anyone write checks anymore?), it's time to think about the New Year's resolutions we made and are (hopefully again) still keeping. For instance... if you've been putting off getting an energy assessment of your home, why wait? Now is a good time to find out if you have cracks, leaks or other places where heat is escaping; you can start making your home more energy efficient today. Have you put off replacing your traditional light bulbs with energy efficient ones? Well, check out our page on lighting and get started! There

32

New Years Revolutions | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Years Revolutions Years Revolutions New Years Revolutions January 3, 2012 - 9:42am Addthis Drew Bittner Web Manager, Office of Energy Efficiency and Renewable Energy Happy New Year to all you Energy Savers out there! Now that 2012 calendars are up and we (hopefully) remember to use '12 instead of '11 where necessary (does anyone write checks anymore?), it's time to think about the New Year's resolutions we made and are (hopefully again) still keeping. For instance... if you've been putting off getting an energy assessment of your home, why wait? Now is a good time to find out if you have cracks, leaks or other places where heat is escaping; you can start making your home more energy efficient today. Have you put off replacing your traditional light bulbs with energy efficient ones? Well, check out our page on lighting and get started! There

33

The Brazil Technology Center Speeds the Pace of Innovation |...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Brazil Technology Center Speeds the Pace of Innovation The Brazil Technology Center Speeds the Pace of Innovation Bruno Betoni Parodi 2012.09.06 (Please find Portuguese translation...

34

(M)other Russia: Evolution or Revolution  

E-Print Network [OSTI]

(M)other Russia: Evolution or Revolution Twenty Years since the Collapse of Communism An inter.music.sas.ac.uk £25 (£15 student) Keynote speakers: Sir Rodric Braithwaite (former UK Ambassador to Russia) Vladimir Ambassador to Russia: Russia Today Coffee 11:00 Irina Souch (University of Amsterdam): Double Thinking

Miranda, Eduardo Reck

35

GREEN FLUORESCENT PROTEIN The green revolution  

E-Print Network [OSTI]

GREEN FLUORESCENT PROTEIN The green revolution Green fluorescent protein allows gene expression a fluorescent product when expressed. Just such a molecule, green fluorescent protein (GFP), has recently green light when disturbed (often seen when riding in a boat at night). In Aequorea, the green

Stearns, Tim

36

SMART Wind Turbine Rotor: Design and Field Test | Department...  

Energy Savers [EERE]

Design and Field Test SMART Wind Turbine Rotor: Design and Field Test This report documents the design, fabrication, and testing of the SMART Wind Turbine Rotor. This work...

37

Sandia National Laboratories: The Influence of Rotor Blade Design...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

National Rotor Testbed (NRT) includes research to quantify the degree to which the blade design load distribution influences the rotor near- and mid-wake velocity deficits and...

38

Substantially parallel flux uncluttered rotor machines  

DOE Patents [OSTI]

A permanent magnet-less and brushless synchronous system includes a stator that generates a magnetic rotating field when sourced by polyphase alternating currents. An uncluttered rotor is positioned within the magnetic rotating field and is spaced apart from the stator. An excitation core is spaced apart from the stator and the uncluttered rotor and magnetically couples the uncluttered rotor. The brushless excitation source generates a magnet torque by inducing magnetic poles near an outer peripheral surface of the uncluttered rotor, and the stator currents also generate a reluctance torque by a reaction of the difference between the direct and quadrature magnetic paths of the uncluttered rotor. The system can be used either as a motor or a generator

Hsu, John S.

2012-12-11T23:59:59.000Z

39

Acoustic modulation effect of rotating stator/rotor interaction noise  

E-Print Network [OSTI]

order, B(k) is the number of rotor blades, (k) is the angular velocity of the rotor, (l) is the angular on the rotor blades and on the fixed parts. According to the Ffowcs-Williams and Hawk- ings analogy comes from the periodic forces on the rotor blades and the forces on the other static parts of the fan

Boyer, Edmond

40

Safety Warnings Quad Rotors (Quad-Pilot 2 F.3)  

E-Print Network [OSTI]

Safety Warnings Quad Rotors (Quad-Pilot 2 F.3) The quad rotor "quad-pilot 2 F.3" is a complicated accidents from taking place. Operation of the quad rotor should be performed in a safe and responsible not accept any liability for damage and consequent damage arising from the use of the quad rotors, as we have

Langendoen, Koen

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Interlayer toughening of fiber composite flywheel rotors  

SciTech Connect (OSTI)

An interlayer toughening mechanism to mitigate the growth of damage in fiber composite flywheel rotors for long application. The interlayer toughening mechanism may comprise one or more tough layers composed of high-elongation fibers, high-strength fibers arranged in a woven pattern at a range from 0.degree. to 90.degree. to the rotor axis and bound by a ductile matrix material which adheres to and is compatible with the materials used for the bulk of the rotor. The number and spacing of the tough interlayers is a function of the design requirements and expected lifetime of the rotor. The mechanism has particular application in uninterruptable power supplies, electrical power grid reservoirs, and compulsators for electric guns, as well as electromechanical batteries for vehicles.

Groves, Scott E. (Brentwood, CA); Deteresa, Steven J. (Livermore, CA)

1998-01-01T23:59:59.000Z

42

A carbon nanotube bearing and Stodola rotor  

E-Print Network [OSTI]

A nano-scale rotor supported on a cantilevered multi-wall carbon nanotube (MWNT) shaft (Stodola configuration) is proposed. The nanotube is also expected to function as the bearing, since individual walls of a MWNT are not ...

Cook, Eugene Hightower

2008-01-01T23:59:59.000Z

43

Flirty Fishing – Gender Ethics and the Jesus Revolution  

E-Print Network [OSTI]

of God. Studying gender ethics within the JM will helpFlirty Fishing – Gender Ethics and the Jesus Revolution byof free love, gender ethics and evangelical Christianity

Johnson, Julianne

2014-01-01T23:59:59.000Z

44

Published: 23 June 2011 Another Revolution Afoot in Egypt  

E-Print Network [OSTI]

1 Published: 23 June 2011 Another Revolution Afoot in Egypt: Top-Notch Science Egypt has launched way to cure fanaticism. Op-Ed by Ahmed H. Zewail Cairo -- Nearly 100 days after the revolution, Egypt say hawa gadid -- a new air. The big question is how to channel this energy to forge a new Egypt

Zewail, Ahmed

45

IT Complexity Revolution: Intelligent Tools for the Globalised World Development  

E-Print Network [OSTI]

IT Complexity Revolution: Intelligent Tools for the Globalised World Development Andrei Kirilyuk be used as a basis for the latter, in the form of "complexity revolution" in information systems-driven IT to various aspects of post-industrial civilisation dynamics, including intelligent communication, context

Boyer, Edmond

46

Revolution Now: The Future Arrives for Four Clean Energy Technologies |  

Broader source: Energy.gov (indexed) [DOE]

Revolution Now: The Future Arrives for Four Clean Energy Revolution Now: The Future Arrives for Four Clean Energy Technologies Revolution Now: The Future Arrives for Four Clean Energy Technologies This report focuses on four technology revolutions that are here today. In the last five years they have achieved dramatic reductions in cost and this has been accompanied by a surge in consumer, industrial and commercial deployment. Although these four technologies still represent a small percentage of their total market (e.g. electricity, cars and lighting), they are growing rapidly. The four key technologies this report focuses on are: Onshore wind power Polysilicon photovoltaic modules LED lighting Electric vehicles Editor's note: The original report has been updated to fix inaccuracies in some graph labels. Revolution Now -- The Future Arrives for Four Clean Energy Technologies.pdf

47

A Clean Energy Revolution -- Now | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

A Clean Energy Revolution -- Now A Clean Energy Revolution -- Now A Clean Energy Revolution -- Now September 19, 2013 - 3:52pm Addthis A Clean Energy Revolution -- Now Dr. Ernest Moniz Dr. Ernest Moniz Secretary of Energy #CleanTechNow: Learn more Watch a video featuring Secretary Moniz that highlights four key energy technologies that have already made America's clean energy future a reality. Read the full "Revolution Now" report. Use the tag #CleanTechNow to share photos on Twitter, Instagram or via email newmedia@hq.doe.gov how clean energy technology already plays a role in your daily life. We'll feature our favorite submissions on Energy.gov next week. Editor's note: This article originally appeared on WhiteHouse.gov. For decades, America has chased after the promise of clean, domestic

48

Revolution Now: The Future Arrives for Four Clean Energy Technologies |  

Broader source: Energy.gov (indexed) [DOE]

Revolution Now: The Future Arrives for Four Clean Energy Revolution Now: The Future Arrives for Four Clean Energy Technologies Revolution Now: The Future Arrives for Four Clean Energy Technologies This report focuses on four technology revolutions that are here today. In the last five years they have achieved dramatic reductions in cost and this has been accompanied by a surge in consumer, industrial and commercial deployment. Although these four technologies still represent a small percentage of their total market (e.g. electricity, cars and lighting), they are growing rapidly. The four key technologies this report focuses on are: Onshore wind power Polysilicon photovoltaic modules LED lighting Electric vehicles Editor's note: The original report has been updated to fix inaccuracies in some graph labels. Revolution Now -- The Future Arrives for Four Clean Energy Technologies.pdf

49

E-Print Network 3.0 - american revolution Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

for: american revolution Page: << < 1 2 3 4 5 > >> 1 J. Franklin Jameson Written when political Summary: . Franklin Jameson's The American Revolution Con- sidered as a Social Move-...

50

niscent of the early stages of the industrial revolution, when inefficient factories pollut-  

E-Print Network [OSTI]

niscent of the early stages of the industrial revolution, when inefficient factories pollut- ed environment.However,agreenerrevolution is also needed -- a revolution that incorpo- rates accumulated

Wolfe, Cecily J.

51

Turbine bearings and rotor dynamics workshop: proceedings  

SciTech Connect (OSTI)

An EPRI workshop to address turbine bearing reliability improvement and rotor dynamics was co-hosted by Detroit Edison in Dearborn, Michigan on September 8-10, 1982. The 136 attendees represented a broad spectrum of US utilities, equipment manufacturers, and consultants, as well as representatives from England, Japan, and Switzerland. These proceedings contain the text of the formal presentations as well as summaries of the working group sessions which were devoted to topics of particular interest to the workshop participants. Formal presentations were organized under the following general session titles: utility experience and advancements in turbine bearing and lubrication systems; recent advancements in turbine bearing and lubrication systems; utility experience and advancements in turbine-generator rotor dynamics; and recent advancements in turbine-generator rotor dynamics. In addition to the technical presentations, working group sessions were held on selected topics relevant to turbine bearing reliability improvement and rotor dynamics. These groups provided a forum for engineers to exchange ideas and information in a less formal environment. The discussions provided attendees with an opportunity to discuss key issues in more detail and address subjects not covered in the formal presentations. The subjects of these working groups were: rotor dynamic analysis and problem solving; vibration signature analysis and field balancing; oil contamination monitoring and control; and operation and maintenance practices. Individual papers have been entered individually into EDB and ERA.

Brown, R.G.; Quilliam, J.F. (eds.)

1985-06-01T23:59:59.000Z

52

MHK Technologies/Wave Rotor | Open Energy Information  

Open Energy Info (EERE)

Rotor Rotor < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Wave Rotor.jpg Technology Profile Primary Organization Ecofys Subsidiary of Econcern Project(s) where this technology is utilized *MHK Projects/C Energy Technology Resource Click here Wave Technology Type Click here Axial Flow Turbine Technology Readiness Level Click here TRL 5/6: System Integration and Technology Laboratory Demonstration Technology Description The Wave Rotor uses a combined Darrieus-Wells rotor, which is contained on the same vertical axis of rotation. These are respectively omni- and bi-directional rotors that can operate in currents of changing directions. The Wave Rotor is mounted on a platform to allow for the capture of wave energy from circulating water particles created by local currents. Since it uses two types of rotor on a single axis of rotation it is able to convert not only tidal currents, but also waves into electricity.

53

Accelerator dynamics of a fractional kicked rotor  

E-Print Network [OSTI]

It is shown that the Weyl fractional derivative can quantize an open system. A fractional kicked rotor is studied in the framework of the fractional Schrodinger equation. The system is described by the non-Hermitian Hamiltonian by virtue of the Weyl fractional derivative. Violation of space symmetry leads to acceleration of the orbital momentum. Quantum localization saturates this acceleration, such that the average value of the orbital momentum can be a direct current and the system behaves like a ratchet. The classical counterpart is a nonlinear kicked rotor with absorbing boundary conditions.

A. Iomin

2006-09-14T23:59:59.000Z

54

INTRODUCTION 1.1 Aerodynamics of Rotors in Forward Flight  

E-Print Network [OSTI]

1 CHAPTER I INTRODUCTION 1.1 Aerodynamics of Rotors in Forward Flight The prediction of rotor blade aerodynamic loads, especially in forward flight, requires accurate and efficient modeling of several distinct to the nonlinear interaction between the rotor aerodynamics, trim, aeroelasticity and blade dynamics. As stated

55

Texas Fluid Dynamics Meeting, 2013 STABILITY OF ROTOR WAKES.  

E-Print Network [OSTI]

et al.(2000) [1] did eigenvalue stability analysis on multi-bladed helicopter rotor wakes and found, of multi-bladed helicopter rotor wake. Despite various analytical, numerical and flow visualiza- tion-scale four- bladed helicopter rotor in hover [6,7], revealed some impor- tant observations. Investigations

Tinney, Charles E.

56

Modeling of a rotor speed transient response with radial rubbing  

E-Print Network [OSTI]

by an accidental blade­off imbalance. In order to assess the angular deceleration of the rotor due to rubbingModeling of a rotor speed transient response with radial rubbing Sébastien Roques1 Institut deGill Univer- sity, 817 Sherbrooke St West, Montreal, Quebec H3A 2K6, Canada Abstract A rotor­stator model

Boyer, Edmond

57

Voith High Efficiency HM Rotor Energy Data, A Repulper Rotor Design Case Study  

E-Print Network [OSTI]

A recently completed demonstration project, funded partly by the Wisconsin Focus on Energy program and Wisconsin Public Service Corporation, shows the effectiveness of an energy efficient repulper rotor design compared with that of a conventional...

Aue, J.; Fineran, B.

2005-01-01T23:59:59.000Z

58

TIP DESENSITIZATION OF AN AXIAL TURBINE ROTOR  

E-Print Network [OSTI]

flow causes total pressure loss and significantly reduces turbine stage efficiency. Tip leakage relatedCC-63 TIP DESENSITIZATION OF AN AXIAL TURBINE ROTOR USING PARTIAL SQUEALER RIMS Debashis Dey1 of full and partial-length squealer rims in a turbine stage. Full and partial-length squealer rims

Camci, Cengiz

59

Utilization of rotor kinetic energy storage for hybrid vehicles  

DOE Patents [OSTI]

A power system for a motor vehicle having an internal combustion engine, the power system comprises an electric machine (12) further comprising a first excitation source (47), a permanent magnet rotor (28) and a magnetic coupling rotor (26) spaced from the permanent magnet rotor and at least one second excitation source (43), the magnetic coupling rotor (26) also including a flywheel having an inertial mass to store kinetic energy during an initial acceleration to an operating speed; and wherein the first excitation source is electrically connected to the second excitation source for power cycling such that the flywheel rotor (26) exerts torque on the permanent magnet rotor (28) to assist braking and acceleration of the permanent magnet rotor (28) and consequently, the vehicle. An axial gap machine and a radial gap machine are disclosed and methods of the invention are also disclosed.

Hsu, John S. (Oak Ridge, TN)

2011-05-03T23:59:59.000Z

60

Sensible Solar Fueling Energy Revolution in Georgia | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Sensible Solar Fueling Energy Revolution in Georgia Sensible Solar Fueling Energy Revolution in Georgia Sensible Solar Fueling Energy Revolution in Georgia May 14, 2010 - 3:35pm Addthis Joshua DeLung During his recent commencement address at the Georgia Institute of Technology, Energy Secretary Steven Chu hailed the ingenuity of the engineers responsible for the Industrial Revolution. He noted, however, that the carbon emissions from that pivotal era have caused the world's climate to change drastically. "More frequent heat waves and increased water stress in many areas of the world are predicted," he said. "Rising sea levels and the severity of hurricanes and cyclones will threaten low-lying coastal areas. The climate will change so rapidly that many species, including many people, will have

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Implications of the U.S. Shale Revolution  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Implications of the U.S. Shale Revolution For US-Canada Energy Summit October 17, 2014 | Chicago, IL By Adam Sieminski, Administrator U.S. Energy Information Administration 0 5 10...

62

Nanosciences : evolution or revolution ? Jean-Louis Pautrat  

E-Print Network [OSTI]

1 Nanosciences : evolution or revolution ? Jean-Louis Pautrat Physicist, former Director of Foundation "Nanosciences aux limites de la nanoélectronique" 23 rue des Martyrs, 38000 Grenoble Abstract

Paris-Sud XI, Université de

63

21H.001 How to Stage a Revolution, Fall 2007  

E-Print Network [OSTI]

21H.001, a HASS-D, CI course, explores fundamental questions about the causes and nature of revolutions. How do people overthrow their rulers? How do they establish new governments? Do radical upheavals require bloodshed, ...

Ravel, Jeffrey S.

64

Sensible Solar Fueling Energy Revolution in Georgia | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Sensible Solar Fueling Energy Revolution in Georgia Sensible Solar Fueling Energy Revolution in Georgia Sensible Solar Fueling Energy Revolution in Georgia May 14, 2010 - 3:35pm Addthis Joshua DeLung During his recent commencement address at the Georgia Institute of Technology, Energy Secretary Steven Chu hailed the ingenuity of the engineers responsible for the Industrial Revolution. He noted, however, that the carbon emissions from that pivotal era have caused the world's climate to change drastically. "More frequent heat waves and increased water stress in many areas of the world are predicted," he said. "Rising sea levels and the severity of hurricanes and cyclones will threaten low-lying coastal areas. The climate will change so rapidly that many species, including many people, will have

65

Inorganic membranes: The new industrial revolution  

SciTech Connect (OSTI)

Separation systems are a vital part of most industrial processes. These systems account for a large fraction of the capital equipment used and the operating costs of industrial processes. Inorganic membranes have the potential for providing separation systems that can significantly reduce both the capital equipment and operating costs. These separation processes include waste management and recycle as well as the primary production of raw materials and products. The authors are rapidly learning to understand the effect of physical and chemical properties on the different transport mechanisms that occur in inorganic membranes. Such understanding can be expected to provide the information needed to design, engineer and manufacture inorganic membranes to produce very high separation factors for almost any separation function. To implement such a revolution, the authors need to organize a unique partnership between the national laboratories, and industry. The university can provide research to understand the materials and transport mechanisms that produce various separations, the national laboratories the development of an economical fabrication and manufacturing capability, and industry the practical understanding of the operational problems required to achieve inplementation.

Fain, D.E. [Martin Merietta Energy Systems, Oak Ridge, TN (United States)

1994-12-31T23:59:59.000Z

66

A review of "Radicalism in British Literary Culture: From Revolution to Revolution." by T. Morton and N. Smith, eds.  

E-Print Network [OSTI]

be strangled in the bowels of the last priest,? Justin Champion sees the aftermath of the English Revolution, and espe- cially of the Toleration Act of 1689, as triggering a long-term heterodoxy in public discourse about religion and politics... be strangled in the bowels of the last priest,? Justin Champion sees the aftermath of the English Revolution, and espe- cially of the Toleration Act of 1689, as triggering a long-term heterodoxy in public discourse about religion and politics...

R. C. Taylor

2003-01-01T23:59:59.000Z

67

Dynamical Localization in Kicked Quantum Rotors  

E-Print Network [OSTI]

The periodically $\\delta$-kicked quantum linear rotor is known to experience non-classical bounded energy growth due to quantum dynamical localization in angular momentum space. We study the effect of random deviations of the kick period in simulations and experiments. This breaks the energy and angular momentum localization and increases the rotational alignment, which is the analog of the onset of Anderson localization in 1-D chains.

Kamalov, Andrei; Bucksbaum, Philip H

2015-01-01T23:59:59.000Z

68

Disc rotors with permanent magnets for brushless dc motor  

SciTech Connect (OSTI)

This patent describes a brushless dc permanent magnet motor for driving an autonomous underwater vehicle. It comprises first and second substantially flat, generally cylindrical stators disposed in side by side relation; a first substantially flat, generally cylindrical rotor; a first shaft connected to the first rotor and a second, concentric shaft connected to the second rotor; and means for providing rotation of the first and second shafts in opposite directions.

Hawsey, R.A.; Bailery, J.M.

1992-05-26T23:59:59.000Z

69

Rotor for processing liquids using movable capillary tubes  

DOE Patents [OSTI]

A rotor assembly for processing liquids, especially whole blood samples, is disclosed. The assembly includes apparatus for separating non-liquid components of whole blood samples from liquid components, apparatus for diluting the separated liquid component with a diluent and apparatus for transferring the diluted sample to an external apparatus for analysis. The rotor assembly employs several movable capillary tubes to handle the sample and diluents. A method for using the rotor assembly to process liquids is also described. 5 figs.

Johnson, W.F.; Burtis, C.A.; Walker, W.A.

1987-07-17T23:59:59.000Z

70

Interface structure for hub and mass attachment in flywheel rotors  

DOE Patents [OSTI]

An interface structure for hub and mass attachment in flywheel rotors. The interface structure efficiently transmits high radial compression forces and withstands both large circumferential elongation and local stresses generated by mass-loading and hub attachments. The interface structure is comprised of high-strength fiber, such as glass and carbon, woven into an angle pattern which is about 45.degree. with respect to the rotor axis. The woven fiber is bonded by a ductile matrix material which is compatible with and adheres to the rotor material. This woven fiber is able to elongate in the circumferential direction to match the rotor growth during spinning.

Deteresa, Steven J. (Livermore, CA); Groves, Scott E. (Brentwood, CA)

1998-06-02T23:59:59.000Z

71

Interface structure for hub and mass attachment in flywheel rotors  

DOE Patents [OSTI]

An interface structure is described for hub and mass attachment in flywheel rotors. The interface structure efficiently transmits high radial compression forces and withstands both large circumferential elongation and local stresses generated by mass-loading and hub attachments. The interface structure is comprised of high-strength fiber, such as glass and carbon, woven into an angle pattern which is about 45{degree} with respect to the rotor axis. The woven fiber is bonded by a ductile matrix material which is compatible with and adheres to the rotor material. This woven fiber is able to elongate in the circumferential direction to match the rotor growth during spinning. 2 figs.

Deteresa, S.J.; Groves, S.E.

1998-06-02T23:59:59.000Z

72

Energy & the Industrial Revolution: Past, Present & Future | Argonne  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Energy & the Industrial Revolution: Past, Present & Future Energy & the Industrial Revolution: Past, Present & Future Event Sponsor: Director's Special Colloquium Start Date: Nov 22 2013 - 10:00am Building/Room: Building 402/Auditorium Location: Argonne National Laboratory Speaker(s): Arun Majumdar Speaker(s) Title: Google As we work to develop clean, sustainable and innovative approaches to our nation's greatest energy challenges, Argonne researchers are constantly seeking new insights into the future of the global energy economy. The laboratory is pleased to welcome Director's Special Colloquium speaker Arun Majumdar, who will give a presentation on "Energy & the Industrial Revolution: Past, Present & Future." Dr. Majumdar, a recognized leader in energy innovation, drives energy initiatives at Google.org (the company's charitable arm) and advises the

73

Energy revolution: policies for a sustainable future  

SciTech Connect (OSTI)

The book examines the policy options for mitigating or removing the entrenched advantages held by fossil fuels and speeding the transition to a more sustainable energy future, one based on improved efficiency and a shift to renewable sources such as solar, wind, and bioenergy. The book: examines today's energy patterns and trends and their consequences; describes the barriers to a more sustainable energy future and how those barriers can be overcome; provides ten case studies of integrated strategies that have been effective in different parts of the world examines international policies and institutions and recommends ways they could be improved; reviews global trends that suggest that the transition to renewables and increased efficiency is underway and is achievable. The core of the book are presentations of Clean Energy scenarios for the US and Brazil. His US scenario has 10 policies. These include: Adopt voluntary agreements to reduce industrial energy use; Provide tax incentives for innovative renewable energy and energy-efficient technologies; Expand federal R & D and deployment programs; Remove barriers to combined heat and power systems; and Strengthen emissions standards on coal-fired plants. Geller calculates that the impact of his ten policies would be a $600 billion cost and a $1200 billion savings, for a net savings of $600 billion compared to a baseline scenario of continued promotion of fossil fuels.

Howard Geller [Southwest Energy Efficiency Project, Boulder, CO (United States)

2002-07-01T23:59:59.000Z

74

Adaptive rotor current control for wind-turbine driven DFIG using resonant controllers in a rotor rotating reference frame  

Science Journals Connector (OSTI)

This paper proposes an adaptive rotor current controller for doubly-fed induction generator (DFIG), which consists of a proportional (P...? slip+ and ? slip?..., respectively. As a...

Jia-bing Hu; Yi-kang He; Hong-sheng Wang

2008-02-01T23:59:59.000Z

75

US democracy assistance programs in Ukraine after the Orange Revolution  

Science Journals Connector (OSTI)

Abstract The 2004 Orange Revolution failed to skyrocket Ukraine into the ranks of consolidated democracies. Some previous research claimed that, in the similar case of post-Rose Revolution Georgia, its vague democratic perspectives can be explained by, among others, a negative impact of politically biased US democracy assistance programs. This article examines five groups of US programs (electoral aid, political party development, legislative strengthening, NGO development and media strengthening) implemented in Ukraine in 2005–2010, and concludes that US diplomatic support for the pro-Western “Orange” leadership did not translate into political bias of US-funded democracy assistance programs.

Povilas Žielys; R?ta Rudinskait?

2014-01-01T23:59:59.000Z

76

E-Print Network 3.0 - aero-elasticity rotor aerodynamics Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summary: HVDC 12;Rotor aero-elastics and structural dynamics 12;Aerodynamics for wind turbines Flow over... and components Rotor aero-elastics and structural dynamics Grid...

77

Turning Waste Heat into Power: Ener-G-Rotors and the Entrepreneurial...  

Broader source: Energy.gov (indexed) [DOE]

Turning Waste Heat into Power: Ener-G-Rotors and the Entrepreneurial Mentorship Program Turning Waste Heat into Power: Ener-G-Rotors and the Entrepreneurial Mentorship Program...

78

The Communications Revolution and Health Inequalities in the 21st Century: Implications for Cancer Control  

Science Journals Connector (OSTI)

...Revolution and Health Inequalities in the 21st Century: Implications for Cancer Control...inequalities and public health implications of adult social...revolution and health inequalities in the 21st century: implications for cancer control...

K. Viswanath; Rebekah H. Nagler; Cabral A. Bigman-Galimore; Michael P. McCauley; Minsoo Jung; and Shoba Ramanadhan

2012-10-01T23:59:59.000Z

79

Vibration Control of Multi-Mode Rotor-Bearing Systems  

Science Journals Connector (OSTI)

8 March 1983 research-article Vibration Control of Multi-Mode Rotor-Bearing...least-squares method to minimize the vibration of any general rotor-bearing system...to implement the open-loop adaptive vibration control strategies outlined in the paper...

1983-01-01T23:59:59.000Z

80

IT Revolutions in the Industry: From the Command Economy to the eNetworked Industrial Ecosystem  

E-Print Network [OSTI]

IT ­ Revolutions in the Industry: From the Command Economy to the eNetworked Industrial Ecosystem of the traditional hierarchy ­ as backbone of last Century's Industrial Revolution - towards the eNetworked Industrial Ecosystem ­ as backbone for this Century's on-going IT-Revolution. Socio-cultural and economic

Ulieru, Mihaela

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Industrial Revolutions and Consumption: A Common Model to the Various Periods of Industrialization  

E-Print Network [OSTI]

Industrial Revolutions and Consumption: A Common Model to the Various Periods of Industrialization and establish a plausible link between consumption structure evolutions and industrial revolutions. In particular, we show that an industrial revolution starts with a "smithian growth process", which is demand

Boyer, Edmond

82

Disc rotors with permanent magnets for brushless DC motor  

SciTech Connect (OSTI)

A brushless dc permanent magnet motor drives an autonomous underwater vehe. In one embodiment, the motor comprises four substantially flat stators in stacked relationship, with pairs of the stators axially spaced, each of the stators comprising a tape-wound stator coil, and first and second substantially flat rotors disposed between the spaced pairs of stators. Each of the rotors includes an annular array of permanent magnets embedded therein. A first shaft is connected to the first rotor and a second, concentric shaft is connected to the second rotor, and a drive unit causes rotation of the two shafts in opposite directions. The second shaft comprises a hollow tube having a central bore in which the first shaft is disposed. Two different sets of bearings support the first and second shafts. In another embodiment, the motor comprises two ironless stators and pairs of rotors mounted on opposite sides of the stators and driven by counterrotating shafts.

Hawsey, Robert A. (Oak Ridge, TN); Bailey, J. Milton (Knoxville, TN)

1992-01-01T23:59:59.000Z

83

Published: 14 October 2013 The Revolution Egypt Needs  

E-Print Network [OSTI]

1 Published: 14 October 2013 The Revolution Egypt Needs Op-Ed by Ahmed H. Zewail Pasadena, California -- When I was a boy in Desuq, Egypt, a city on the Rosetta branch of the Nile, about 50 miles east was in the fabric of our culture and religion. I left Egypt in 1969 for graduate school at the University

Zewail, Ahmed

84

Henry Cavendish: the catalyst for the chemical revolution  

Science Journals Connector (OSTI)

...Society 1. The article was originally dedicated to Glenn T. Seaborg (1912-1999) and concentrates particularly on Cavendish's...that was carried out during and after World War II by Glenn Seaborg and others. The revolution in chemical science brought...

2005-01-01T23:59:59.000Z

85

The development of coke smelting and the industrial revolution  

E-Print Network [OSTI]

Abraham Darby and the origins of the industrial revolution in Britain. Alan Macfarlane talks to John about the reasons for the area near Birmingham becoming the epi-centre of the industrial development, and the development of coke furnaces and iron...

Macfarlane, Alan

2004-08-05T23:59:59.000Z

86

Adult Football Helmet Detailed Ratings Riddell Revolution Speed  

E-Print Network [OSTI]

Adult Football Helmet Detailed Ratings May 2011 Riddell Revolution Speed Helmet ID SPEED1 SPEED2: A total of 10 adult football helmet models were evaluated using the STAR evaluation system for May 2011.397 0.350 0.322 Overall STAR 0.356 Very Good: Adult Football Helmet Detailed Ratings May 2011 #12

Lu, Chang

87

NBER WORKING PAPER SERIES COAL AND THE EUROPEAN INDUSTRIAL REVOLUTION  

E-Print Network [OSTI]

underpinning comparative European economic development during the Industrial Revolution. Our analysis exploits of coal-powered technologies, to quantify the effect of coal availability on historic city population.orourke@all-souls.ox.ac.uk #12;1 Introduction There is a long tradition in economic history that places coal at the centre

Huber, Bernhard A.

88

Department of Computer Engineering Spring 2010 Boeing Wind Tunnel Rotor Flight Simulator  

E-Print Network [OSTI]

PENNSTATE Department of Computer Engineering Spring 2010 Boeing Wind Tunnel Rotor Flight Simulator the construction of a wind tunnel rotor flight simulator. The program should allow the pilot to change the rotor and comfortable simulator with the following parts: A rotor controller, a wind tunnel controller, a graphical

Demirel, Melik C.

89

RESULTS AND DISCUSSION -Part I UH60A Rotor in High Speed Forward Flight  

E-Print Network [OSTI]

rotor for a number of hover and forward flight conditions. This rotor is a four-bladed configuration.2: Geometric Twist Distribution for the UH-60A Rotor In the experiment, the blades were trimmed to eliminate the one-per-rev flapping. The rotor blade sectional twist including elastic deformation is available

90

Reference Model 2: %22Rev 0%22 Rotor Design.  

SciTech Connect (OSTI)

The preliminary design for a three-bladed cross-flow rotor for a reference marine hydrokinetic turbine is presented. A rotor performance design code is described, along with modifications to the code to allow prediction of blade support strut drag as well as interference between two counter-rotating rotors. The rotor is designed to operate in a reference site corresponding to a riverine environment. Basic rotor performance and rigid-body loads calculations are performed to size the rotor elements and select the operating speed range. The preliminary design is verified with a simple finite element model that provides estimates of bending stresses during operation. A concept for joining the blades and support struts is developed and analyzed with a separate finite element analysis. Rotor mass, production costs, and annual energy capture are estimated in order to allow calculations of system cost-of-energy. Evaluation Only. Created with Aspose.Pdf.Kit. Copyright 2002-2011 Aspose Pty Ltd Evaluation Only. Created with Aspose.Pdf.Kit. Copyright 2002-2011 Aspose Pty Ltd

Barone, Matthew F.; Berg, Jonathan Charles; Griffith, Daniel

2011-12-01T23:59:59.000Z

91

Research on a novel Rotor Structure Switched Reluctance Motor  

Science Journals Connector (OSTI)

The paper proposes a novel switched reluctance motor with improved rotor structure, in which the segment core is embedded in aluminum rotor block in order to increase the mechanical strength and easy manufacturing as well as to improve the performance characteristics and reduce the vibration and acoustic noise. The effect of design parameters on the average torque is investigated using the finite element method. Comparison with conventional VR type SRM and segment type SRM without conductive metal construction rotor show the proposed novel SRM has advantages in the torque performances and the vibration and noise characteristics. The performance is also investigated by experiment.

Lingquan Zeng; Haiwei Yu

2012-01-01T23:59:59.000Z

92

The 5-megawatt power plant with 126 metre rotor diameter  

E-Print Network [OSTI]

The 5-megawatt power plant with 126 metre rotor diameter #12;Design data Rated power 5,000kW Cut-in speed 3.5m/s Rated wind speed 13.0m/s Cut-out speed 25.0m/s onshore 30.0m/s offshore Wind zone up to DIBt 3 Type class up to IEC Ib / GL offshore type class I Rotor Diameter 126.0m Rotor area 12,469m2

Firestone, Jeremy

93

The Manycore Revolution and Parallel Software Projects at NERSC  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The Manycore The Manycore Revolution and Parallel Software The Manycore Revolution and Parallel Software | Tags: Math & Computer Science PGAS.jpg Key Challenges: A new software ecosystem is expected to emerge over the next decade to support changes brought about by manycore and multicore systems. The question is whether languages like Unified Parallel C (UPC), which runs on all of the major DOE Office of Science platforms, can provide the best path forward, lowering the barrier to entry for parallel computing and making parallel machines more attractive as commercial products. Why it Matters: Although MPI is currently the de facto standard for programming supercomputers, partitioned global address space (PGAS) languages offer advantages in both programmability and performance. They

94

VIDEO: Celebrating Women's Leadership in the Clean Energy Revolution |  

Broader source: Energy.gov (indexed) [DOE]

VIDEO: Celebrating Women's Leadership in the Clean Energy VIDEO: Celebrating Women's Leadership in the Clean Energy Revolution VIDEO: Celebrating Women's Leadership in the Clean Energy Revolution September 30, 2013 - 4:29pm Addthis Watch highlights from the 2013 Women in Clean Energy Symposium -- an annual event that is working to build a community of professionals dedicated to advancing the careers and goals of women in clean energy. | Video by Matty Greene, Energy Department. Erin R. Pierce Erin R. Pierce Digital Communications Specialist, Office of Public Affairs Last week we shared a recap of the 2013 Women in Clean Energy Symposium. The event, a key component of the Clean Energy Education & Empowerment initiative (C3E), provides a forum for thought leaders across the clean energy sector to devise innovative solutions to the nation's most

95

Revolution Now: The Future Arrives for Four Clean Energy Technologies  

DOE R&D Accomplishments [OSTI]

For decades, America has anticipated the transformational impact of clean energy technologies. But even as costs fell and technology matured, a clean energy revolution always seemed just out of reach. Critics often said a clean energy future would ?always be five years away.? This report focuses on four technology revolutions that are here today. In the last five years they have achieved dramatic reductions in cost and this has been accompanied by a surge in consumer, industrial and commercial deployment. Although these four technologies still represent a small percentage of their total market, they are growing rapidly. The four key technologies this report focuses on are: onshore wind power, polysilicon photovoltaic modules, LED lighting, and electric vehicles.

Tillemann, Levi; Beck, Fredric; Brodrick, James; Brown, Austin; Feldman, David; Nguyen, Tien; Ward, Jacob

2013-09-17T23:59:59.000Z

96

Intelligent Microsystems: Keys to the Next Silicon Revolution  

SciTech Connect (OSTI)

Paul McWhorter, Deputy Director for of the Microsystems Center at Sandia National Laboratories, discusses the potential of surface micromachining. A vision of the possibilities of intelligent Microsystems for the future is presented along with descriptions of several possible applications. Applications that are just around the corner and some that maybe quite a ways down the road but have a clear development path to their realization. Microsystems will drive the next silicon revolution.

MCWHORTER,PAUL J.

1999-10-20T23:59:59.000Z

97

Revolution vs. Devolution in Kansas: Teaching in a Conservative Climate  

E-Print Network [OSTI]

academic fredom, I shal argue, as I examine and recommend a strategy for achieving this revolution in the devolving situation that is Kansas. I. Religious fundamentalism and academic fredom in Kansas The political problems of teaching in Kansas can... feminists and biologists: evolution, sexuality education, abortion, stem cel research, and academic fredom itself. Each of these isues and the related controversies in Kansas ilustrate how fundamentalists would restrict the world view of students...

Cudd, Ann E.

2007-01-01T23:59:59.000Z

98

Rotational Correlation Function of Spherical Rotors and Neutron Scattering  

Science Journals Connector (OSTI)

......Function of Spherical Rotors and Neutron Scattering Juichiro Hama Tuto Nakamura...Correlation Effect on the Slow Neutron Scattering by Polyatomic Molecules with...A. , Kowalska A. Thermal Neutron Scattering-Egelstaff P. A., ed......

Juichiro Hama; Tuto Nakamura

1971-12-01T23:59:59.000Z

99

Lean implementation across value stream in main rotor blade area  

E-Print Network [OSTI]

The primary goal for this project was to help expand the existing capability of Sikorsky's main rotor blade business from raw material (titanium) through final assembly. The project helped to facilitate the ongoing lean ...

Phoenix, Casey J. (Casey John)

2007-01-01T23:59:59.000Z

100

Motor Using High Temperature Superconductor as a Rotor  

Science Journals Connector (OSTI)

It is found that a high temperature superconductor rotates in the rotating magnetic field at ... authors and a small motor is made using high temperature superconductor as a rotor. This motor rotates at...

Makoto Takenaka; Masaharu Minami; Kazuo Morimoto

1994-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Optimization of cylindrical composite flywheel rotors for energy storage  

Science Journals Connector (OSTI)

We hope that our efforts will contribute towards the design of flywheel rotors that have higher energy densities and ... that this can contribute to a future electricity grid that can accommodate renewable energy...

Petrus J. Janse van Rensburg…

2013-01-01T23:59:59.000Z

102

From the Building to the Grid: An Energy Revolution and Modeling...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

From the Building to the Grid: An Energy Revolution and Modeling Challenge June 6 and 7, 2012 University College Dublin, Electricity Research Centre Location: UCD, Engineering...

103

Framing Iran: The Islamic Revolution and the Green Movement as Told Through Time Magazine.  

E-Print Network [OSTI]

?? FRAMING IRAN: THE ISLAMIC REVOLUTION AND THE GREEN MOVEMENT AS TOLD THROUGH TIME MAGAZINE by Nadia Maiwandi This framing analysis was conducted to study… (more)

Maiwandi, Nadia

2013-01-01T23:59:59.000Z

104

From the Building to the Grid: An Energy Revolution and Modeling...  

Office of Scientific and Technical Information (OSTI)

From the Building to the Grid: An Energy Revolution and Modeling Challenge Workshop Proceedings Benjamin Kroposki and Connie Komomua National Renewable Energy Laboratory Mark...

105

Effect of a straight teeth-on-rotor labyrinth seal on rotordynamics  

E-Print Network [OSTI]

of the stiffness and STATOR AIR FLOW ROTOR STATOR Teeth-on-Stator Seal Teeth-on-Rotor Seal Figure 2. Two Types of Labyrinth Seal Configurations Figure 3. Teeth-on-Rotor Labyrinth Seal Figure 4. Teeth-on-Rotor Labyrinth Seals Installed on Rotor damping... of the test rig is shown in Figure 6. Sea 2 Eddy Probes al 90 (Plane 1) Rotor 0 0 0 0 0 0 0 0 0 0 2 Eddy Probes at 90' (Plans 3) Anti-swirl Vane ? Flywheel 0-Rings 0-Ring 3 Compressed Air Cannon)iona 120' Apart Labyrinth Seal Area Seal...

Zierer, Joseph John

2012-06-07T23:59:59.000Z

106

Using a collision model to design safer wind turbine rotors for birds  

SciTech Connect (OSTI)

A mathematical model for collisions between birds and propeller-type turbine rotors identifies the variables that can be manipulated to reduce the probability that birds will collide with the rotor. This study defines a safety index--the clearance power density--that allows rotors of different sizes and designs to be compared in terms of the amount of wind energy converted to electrical energy per bird collision. The collision model accounts for variations in wind speed during the year and shows that for model rotors with simple, one-dimensional blades, the safety index increases in proportion to rotor diameter, and variable speed rotors have higher safety indexes than constant speed rotors. The safety index can also be increased by enlarging the region near the center of the rotor hub where the blades move slowly enough for birds to avoid them. Painting the blades to make them more visible might have this effect. Model rotors with practical designs can have safety indexes an order of magnitude higher than those for model rotors typical of the constant speeds rotors in common use today. This finding suggests that redesigned rotors could have collision rates with birds perhaps an order of magnitude lower than today`s rotors, with no reduction in the production of wind power. The empirical data that exist for collisions between raptors, such as hawks and eagles, and rotors are consistent with the model: the numbers of raptor carcasses found beneath large variable speed rotors, relative to the numbers found under small constant speed rotors, are in the proportions predicted by the collision model rather than in proportion to the areas swept by the rotor blades. However, uncontrolled variables associated with these data prevent a stronger claim of support for the model.

Tucker, V.A. [Duke Univ., Durham, NC (United States). Dept. of Zoology

1996-11-01T23:59:59.000Z

107

Hi-Q Rotor - Low Wind Speed Technology  

SciTech Connect (OSTI)

The project objective was to optimize the performance of the Hi-Q Rotor. Early research funded by the California Energy Commission indicated the design might be advantageous over state-of-the-art turbines for collecting wind energy in low wind conditions. The Hi-Q Rotor is a new kind of rotor targeted for harvesting wind in Class 2, 3, and 4 sites, and has application in areas that are closer to cities, or 'load centers.' An advantage of the Hi-Q Rotor is that the rotor has non-conventional blade tips, producing less turbulence, and is quieter than standard wind turbine blades which is critical to the low-wind populated urban sites. Unlike state-of-the-art propeller type blades, the Hi-Q Rotor has six blades connected by end caps. In this phase of the research funded by DOE's Inventions and Innovation Program, the goal was to improve the current design by building a series of theoretical and numeric models, and composite prototypes to determine a best of class device. Development of the rotor was performed by aeronautical engineering and design firm, DARcorporation. From this investigation, an optimized design was determined and an 8-foot diameter, full-scale rotor was built and mounted using a Bergey LX-1 generator and furling system which were adapted to support the rotor. The Hi-Q Rotor was then tested side-by-side against the state-of-the-art Bergey XL-1 at the Alternative Energy Institute's Wind Test Center at West Texas State University for six weeks, and real time measurements of power generated were collected and compared. Early wind tunnel testing showed that the cut-in-speed of the Hi-Q rotor is much lower than a conventional tested HAWT enabling the Hi-Q Wind Turbine to begin collecting energy before a conventional HAWT has started spinning. Also, torque at low wind speeds for the Hi-Q Wind Turbine is higher than the tested conventional HAWT and enabled the wind turbine to generate power at lower wind speeds. Based on the data collected, the results of our first full-scale prototype wind turbine proved that higher energy can be captured at lower wind speeds with the new Hi-Q Rotor. The Hi-Q Rotor is almost 15% more productive than the Bergey from 6 m/s to 8 m/s, making it ideal in Class 3, 4, and 5 wind sites and has application in the critical and heretofore untapped areas that are closer to cities, 'load centers,' and may even be used directly in urban areas. The additional advantage of the Hi-Q Rotor's non-conventional blade tips, which eliminates most air turbulence, is noise reduction which makes it doubly ideal for populated urban areas. Hi-Q Products recommends one final stage of development to take the Hi-Q Rotor through Technology Readiness Levels 8-9. During this stage of development, the rotor will be redesigned to further increase efficiency, match the rotor to a more suitable generator, and lower the cost of manufacturing by redesigning the structure to allow for production in larger quantities at lower cost. Before taking the rotor to market and commercialization, it is necessary to further optimize the performance by finding a better generator and autofurling system, ones more suitable for lower wind speeds and rpms should be used in all future testing. The potential impact of this fully developed technology will be the expansion and proliferation of energy renewal into the heretofore untapped Class 2, 3, 4, and 5 Wind Sites, or the large underutilized sites where the wind speed is broken by physical features such as mountains, buildings, and trees. Market estimates by 2011, if low wind speed technology can be developed are well above: 13 million homes, 675,000 commercial buildings, 250,000 public facilities. Estimated commercial exploitation of the Hi-Q Rotor show potential increase in U.S. energy gained through the clean, renewable wind energy found in low and very low wind speed sites. This new energy source would greatly impact greenhouse emissions as well as the public sector's growing energy demands.

Todd E. Mills; Judy Tatum

2010-01-11T23:59:59.000Z

108

Imbalance response of a rigid rotor supported on end sealed integral squeeze film dampers  

E-Print Network [OSTI]

-up*' the bearings and produce large oibits at the midspan of the flexible rotor San Andres and Lubell (1997) perform experiments in a three-disk rigid rotor supported on conventional open ended SFDs, and report damping force coefiicients estimated from..., rendering nearly uniform damping coefficients for rotor orbit motions up to 50'/o of the clearance. The tests show the absence of any rotor jump phenomena. San Andrds and Lubell stress the importance of an adequate identification of the structural damping...

De Santiago Duran, Oscar Cesar

2012-06-07T23:59:59.000Z

109

Physical bases for the design of highly efficient rotors in centrifugal pumps  

Science Journals Connector (OSTI)

1. Existing notions concerning optimum (less than 40°) angles of blade inclination in the rotors of centrifugal ...

P. R. Khlopenkov

1979-07-01T23:59:59.000Z

110

Experience you can trust. The U.S. Smart Grid Revolution  

E-Print Network [OSTI]

Experience you can trust. The U.S. Smart Grid Revolution KEMA's Perspectives for Job Creation of Contents The U.S. Smart Grid Revolution December 23, 2008 KEMA's Perspectives for Job Creation i 1.S...............................................................................................2-1 2.2 Smart Grid Activity in the U

111

Consumption, Social Capital, and the 'Industrious Revolution' in Early Modern Germany  

E-Print Network [OSTI]

Consumption, Social Capital, and the “Industrious Revolution” in Early Modern Germany SHEILAGH OGILVIE Faculty of Economics, University of Cambridge Acknowledgements: I am grateful to Marco Belfanti, André... ; labour; discrimination; gender; Germany 1 Expanding market consumption is widely ascribed a key role in European economic growth before industrialization. A “Consumer Revolution” between 1650 and 1800 is thought to have seen the middle classes...

Ogilvie, Sheilagh

112

Joint Stiffness Identification of Six-revolute Industrial Serial Robots Claire Dumas  

E-Print Network [OSTI]

Joint Stiffness Identification of Six-revolute Industrial Serial Robots Claire Dumas , St the stiffness of industrial robots from robot manufacturers. As a consequence, this paper introduces a robust and fast procedure that can be used to identify the joint stiffness values of any six-revolute serial robot

Paris-Sud XI, Université de

113

Phase modulated rotor angle encoder for switched reluctance motor drive  

E-Print Network [OSTI]

sensor. In an inexpensive systein, the rotor position sensor comprises of a magnetized ring along with Hall etfect sensors or opto-interrupters with slotted clisk. An optical sensor has a, light emitting diode which acts as a light transmitter, enid a... sensor. In an inexpensive systein, the rotor position sensor comprises of a magnetized ring along with Hall etfect sensors or opto-interrupters with slotted clisk. An optical sensor has a, light emitting diode which acts as a light transmitter, enid a...

Mahajan, Shailendra

2012-06-07T23:59:59.000Z

114

Vibration analysis of rotor systems using reduced subsystem models  

E-Print Network [OSTI]

the relative motion between the rotor and housing. A detailed analysis of this hydrodynamic coupling force is given in Ref. 1B to 20. Aerodynamic cross-coupling forces are developed when the fluid flows through blades causing a back-flow phenomenon...] is the diagonal matrix of assumed modal damping ratios. In case there are only the coupling forces (FC) at the connecting points to the rotor, the 3l transposed modal matrix [ASS] in equation (44) can 1T further be reduced to sub-matrices corresponding...

Fan, Uei-Jiun

1985-01-01T23:59:59.000Z

115

DETECTION OF IMPULSE-LIKE AIRBORNE SOUND FOR DAMAGE IDENTIFICATION IN ROTOR BLADES OF WIND TURBINES  

E-Print Network [OSTI]

DETECTION OF IMPULSE-LIKE AIRBORNE SOUND FOR DAMAGE IDENTIFICATION IN ROTOR BLADES OF WIND TURBINES burdens of wind turbines. To detect damage of rotor blades, several research projects focus on an acoustic, rotor blade, wind turbine INTRODUCTION There are several publications of non destructive damage

Boyer, Edmond

116

American Institute of Aeronautics Astronautics DEVELOPMENT OF UNSTEADINESS IN A ROTOR WAKE  

E-Print Network [OSTI]

- speed forward flight (or cross-wind), where the wake is swept behind the rotor, the effect of ground1 American Institute of Aeronautics Astronautics DEVELOPMENT OF UNSTEADINESS IN A ROTOR WAKE Georgia Institute of Technology Atlanta, GA 30332-0150 ABSTRACT The flow field around the rotor in ground

117

LOSS OF ROTOR ISOTROPY AS A BLADE DAMAGE INDICATOR FOR WIND TURBINE STRUCTURE HEALTH MONITORING SYSTEMS  

E-Print Network [OSTI]

LOSS OF ROTOR ISOTROPY AS A BLADE DAMAGE INDICATOR FOR WIND TURBINE STRUCTURE HEALTH MONITORING to simulated vibrations of a rotating rotor. KEYWORDS : wind turbine blade, rotor anisotropy, Floquet analysis, OMA INTRODUCTION Blades of modern wind turbines are complex high-tech structures, and their cost

Paris-Sud XI, Université de

118

BASIC CONTROL FOR FOUR ROTOR AUTONOMOUS AERIAL AGENT JONATHAN MCLEAN, CONNECTICUT COLLEGE, USA,  

E-Print Network [OSTI]

more difficult to control, requiring minute adjustments to individual rotor blades, as well as tailBASIC CONTROL FOR FOUR ROTOR AUTONOMOUS AERIAL AGENT JONATHAN MCLEAN, CONNECTICUT COLLEGE, USA platform is required. Our four-rotor platform provides researchers with a inexpensive, fully scalable test

Parker, Gary B.

119

Reduction of multi-stage disk models: Application to an industrial rotor  

E-Print Network [OSTI]

of the rotor into sectors. The bladed disks are coupled by intermediate rings which remove the problem that of a small portion, typically a bladed sector. This configuration no longer holds in real rotors due with multi-stage rotors. However, as underlined by Bladh et al.6 , the critical point is the choice

Boyer, Edmond

120

RESULTS AND DISCUSSION Part II AH-1G ROTOR IN LOW SPEED DESCENT FLIGHT  

E-Print Network [OSTI]

, results are presented for a two-bladed AH-1G rotor in a low-speed descent condition. In low speed forward and Acoustics Test (TAAT) was conducted on an AH-1G Cobra. It used highly instrumented rotor blades direction. The inner Navier-Stokes zone includes about 39% of the total grid points. The rotor has

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Nanotechnology: a successive industrial revolution of Schumpeter's long wave theory  

Science Journals Connector (OSTI)

This paper is concerned with the strategies on research management and technology policies of nanotechnology. Nanotechnology is now a science and technology (S&T) priority area for many Asian countries with governments making efforts to put the results of nanotechnology development to commercialisation. The national policy for nanotechnology is to change the existing technology system and bring about an industrial revolution (the nanorevolution). Under the pressure of competition, the key to success lies in how each country can find the right application on which to focus in order to survive through international competition. This paper reviews nanotechnology research activities in some Asian countries exhibiting an enthusiastic approach in undertaking nanotechnology initiatives â?? Thailand, Malaysia, Singapore, China, South Korea, Taiwan, and Japan. The paper finally recommends policy implications to encourage national innovativeness and effective commercialisation.

Jarunee Wonglimpiyarat

2004-01-01T23:59:59.000Z

122

Quantum dots in bio-imaging: Revolution by the small  

SciTech Connect (OSTI)

Visual analysis of biomolecules is an integral avenue of basic and applied biological research. It has been widely carried out by tagging of nucleotides and proteins with traditional fluorophores that are limited in their application by features such as photobleaching, spectral overlaps, and operational difficulties. Quantum dots (QDs) are emerging as a superior alternative and are poised to change the world of bio-imaging and further its applications in basic and applied biology. The interdisciplinary field of nanobiotechnology is experiencing a revolution and QDs as an enabling technology have become a harbinger of this hybrid field. Within a decade, research on QDs has evolved from being a pure science subject to the one with high-end commercial applications.

Arya, Harinder [Gene Function Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8562 (Japan); Kaul, Zeenia [Gene Function Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8562 (Japan); Wadhwa, Renu [Gene Function Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8562 (Japan); Taira, Kazunari [Gene Function Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8562 (Japan); Hirano, Takashi [Institute for Biological Resources and Functions, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, 7 Ibaraki 305-8562 (Japan); Kaul, Sunil C. [Gene Function Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8562 (Japan)]. E-mail: s-kaul@aist.go.jp

2005-04-22T23:59:59.000Z

123

Magnetic induction of low-carbon steel for generator rotors  

Science Journals Connector (OSTI)

Steels containing 0.11–0.17% C and 4.5–4.6% Ni have higher magnetic induction than steels 25KhN3MFA and 35KhN3MFA which at present are used for generator rotors.

O. V. Filimonova; I. A. Borisov; A. M. Shkatova…

1989-06-01T23:59:59.000Z

124

Offshore Series Wind Turbine Variable Hub heights & rotor diameters  

E-Print Network [OSTI]

3.6MW Offshore Series Wind Turbine GE Energy #12;Feature Variable Hub heights & rotor diameters-savings feature, considering the rigors of offshore power generation. The 3.6 MW offshore wind turbine also, for both on and offshore use. Special features include... As the world's first commercially available wind

Firestone, Jeremy

125

Single Molecular Rotor at the Nanoscale Christian Joachim1  

E-Print Network [OSTI]

�schlikon, Switzerland E-mail: gim@zurich.ibm.com The design of a monomolecular engine such as a rotating motor ®rst requires the preparation of a semi-classical rotating motion of the rotor part of the engine. We show versions of machines in our daily life, using the same working principles such as, for instance, a steam

Gimzewski, James

126

SUPERVISORY ADAPTIVE BALANCING OF RIGID ROTORS DURING ACCELERATION  

E-Print Network [OSTI]

machining spindles, industrial turbomachinery, and aircraft gas turbine engines, are very commonly used strategy is proposed to coordinate the parameter estimation and the balancer control action. Simulation acceleration transient time will be developed based on a rigid rotor model. The actuator used in this research

Zhou, Shiyu

127

Performance of twist-coupled blades on variable speed rotors  

SciTech Connect (OSTI)

The load mitigation and energy capture characteristics of twist-coupled HAWT blades that are mounted on a variable speed rotor are investigated in this paper. These blades are designed to twist toward feather as they bend with pretwist set to achieve a desirable twist distribution at rated power. For this investigation, the ADAMS-WT software has been modified to include blade models with bending-twist coupling. Using twist-coupled and uncoupled models, the ADAMS software is exercised for steady wind environments to generate C{sub p} curves at a number of operating speeds to compare the efficiencies of the two models. The ADAMS software is also used to generate the response of a twist-coupled variable speed rotor to a spectrum of stochastic wind time series. This spectrum contains time series with two mean wind speeds at two turbulence levels. Power control is achieved by imposing a reactive torque on the low speed shaft proportional to the RPM squared with the coefficient specified so that the rotor operates at peak efficiency in the linear aerodynamic range, and by limiting the maximum RPM to take advantage of the stall controlled nature of the rotor. Fatigue calculations are done for the generated load histories using a range of material exponents that represent materials from welded steel to aluminum to composites, and results are compared with the damage computed for the rotor without twist-coupling. Results indicate that significant reductions in damage are achieved across the spectrum of applied wind loading without any degradation in power production.

Lobitz, D.W.; Veers, P.S.; Laino, D.J.

1999-12-07T23:59:59.000Z

128

Deutsche Rotor und Turm Service GmbH Co KG DRTS | Open Energy Information  

Open Energy Info (EERE)

Rotor und Turm Service GmbH Co KG DRTS Rotor und Turm Service GmbH Co KG DRTS Jump to: navigation, search Name Deutsche Rotor und Turm Service GmbH & Co KG (DRTS) Place Bremen, Germany Zip 28239 Sector Wind energy Product Service company for wind turbine blades and towers. References Deutsche Rotor und Turm Service GmbH & Co KG (DRTS)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Deutsche Rotor und Turm Service GmbH & Co KG (DRTS) is a company located in Bremen, Germany . References ↑ "Deutsche Rotor und Turm Service GmbH & Co KG (DRTS)" Retrieved from "http://en.openei.org/w/index.php?title=Deutsche_Rotor_und_Turm_Service_GmbH_Co_KG_DRTS&oldid=344202" Categories:

129

Active Flow Control on Bidirectional Rotors for Tidal MHK Applications  

SciTech Connect (OSTI)

A marine and hydrokinetic (MHK) tidal turbine extracts energy from tidal currents, providing clean, sustainable electricity generation. In general, all MHK conversion technologies are confronted with significant operational hurdles, resulting in both increased capital and operations and maintenance (O&M) costs. To counter these high costs while maintaining reliability, MHK turbine designs can be simplified. Prior study found that a tidal turbine could be cost-effectively simplified by removing blade pitch and rotor/nacelle yaw. Its rotor would run in one direction during ebb and then reverse direction when the current switched to flood. We dubbed such a turbine a bidirectional rotor tidal turbine (BRTT). The bidirectional hydrofoils of a BRTT are less efficient than conventional hydrofoils and capture less energy, but the elimination of the pitch and yaw systems were estimated to reduce levelized cost of energy by 7.8%-9.6%. In this study, we investigated two mechanisms for recapturing some of the performance shortfall of the BRTT. First, we developed a novel set of hydrofoils, designated the yy series, for BRTT application. Second, we investigated the use of active flow control via microtabs. Microtabs are small deployable/retractable tabs, typically located near the leading or trailing edge of an air/hydrofoil with height on the order of the boundary layer thickness (1% - 2% of chord). They deploy approximately perpendicularly to the foil surface and, like gurney flaps and plain flaps, globally affect the aerodynamics of the airfoil. By strategically placing microtabs and selectively deploying them based on the direction of the inflow, performance of a BRTT rotor can be improved while retaining bidirectional operation. The yy foils were computationally designed and analyzed. They exhibited better performance than the baseline bidirectional foil, the ellipse. For example, the yyb07cn-180 had 14.7% higher (l/d)max than an ellipse of equal thickness. The yyb07cn family also had higher c{sub p,min} than equivalently thick ellipses, indicating less susceptibility to cavitation. Microtabs applied on yy foils demonstrated improved energy capture. A series of variable speed and constant speed rotors were developed with the yyb07cn family of hydrofoils. The constant speed yyb07cn rotor (yy-B02-Rcs,opt) captured 0.45% more energy than the equivalent rotor with ellipses (e-B02-Rcs,opt). With microtabs deployed (yy?t-B02-Rcs,opt), the energy capture increase over the rotor with ellipses was 1.05%. Note, however, that microtabs must be applied judiciously to bidirectional foils. On the 18% thick ellipse, performance decreased with the addition of microtabs. Details of hydrofoil performance, microtab sizing and positioning, rotor configurations, and revenue impacts are presented herein.

Shiu, Henry [Research Engineer; van Dam, Cornelis P. [Professor

2013-08-22T23:59:59.000Z

130

#CleanTechNow: America's Clean Energy Revolution | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

#CleanTechNow: America's Clean Energy Revolution #CleanTechNow: America's Clean Energy Revolution #CleanTechNow: America's Clean Energy Revolution September 17, 2013 - 10:21am Addthis Levi Tillemann Levi Tillemann Special Advisor for Policy and International Affairs How can I participate? Read a blog post from Secretary Ernest Moniz about the report and the Clean Energy revolution. All week on energy.gov, we'll be highlighting four key clean energy technologies that are already making America's clean energy future a reality. Share your photos of how clean energy technology already plays a role in your everyday life, using the tag #CleanTechNow. Submit your #CleanTechNow photos via Twitter, Instagram, Facebook or email at newmedia@hq.doe.gov. We'll share our favorites next week. Over the past four years, America's clean energy future has come into

131

#CleanTechNow: America's Clean Energy Revolution | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

#CleanTechNow: America's Clean Energy Revolution #CleanTechNow: America's Clean Energy Revolution #CleanTechNow: America's Clean Energy Revolution September 17, 2013 - 10:21am Addthis Levi Tillemann Levi Tillemann Special Advisor for Policy and International Affairs How can I participate? Read a blog post from Secretary Ernest Moniz about the report and the Clean Energy revolution. All week on energy.gov, we'll be highlighting four key clean energy technologies that are already making America's clean energy future a reality. Share your photos of how clean energy technology already plays a role in your everyday life, using the tag #CleanTechNow. Submit your #CleanTechNow photos via Twitter, Instagram, Facebook or email at newmedia@hq.doe.gov. We'll share our favorites next week. Over the past four years, America's clean energy future has come into

132

EGYPT: The Revolution and the Future February 17, 2011, 7:30 p.m.  

E-Print Network [OSTI]

EGYPT: The Revolution and the Future February 17, 2011, 7:30 p.m. Kane Hall, Room 210 University ELLIS GOLDBERG, Professor of Political Science, University of Washington, Specialist on Egypt

Hochberg, Michael

133

Wind tunnel simulation of wind loading on a solid structure of revolution  

Science Journals Connector (OSTI)

The wind tunnel simulations of wind loading on a solid structure of revolution ... smooth and five rough surfaces were conducted using wind tunnel tests. Time-mean and fluctuating pressure ... distributions. The ...

Le-Tian Yang; Zhi-Fu Gu

2010-08-01T23:59:59.000Z

134

From the Building to the Grid: an Energy Revolution and Modeling...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

From the Building to the Grid: an energy revolution and modeling challenge Workshop Agenda May 1, 2012 7:45 am Security Check-in at NREL Visitors Center 8:00-8:30 Continental...

135

High-frequency approximations for edge scatter from surfaces of revolution  

Science Journals Connector (OSTI)

We consider the radar backscatter from a truncated surface of revolution viewed at axial incidence and derive a closed-form high-frequency (HF) approximation for the physical-optics...

Gordon, William B; Bilow, Henry J

1991-01-01T23:59:59.000Z

136

Food security: contributions from science to a new and greener revolution  

Science Journals Connector (OSTI)

...2007 World energy outlook 2007. Paris, France: International Energy Agency. IEA 2008 World energy outlook 2008. Paris, France: International Energy Agency. IFPRI 2002 Green revolution curse or blessing? Washington, DC: International Food...

2010-01-01T23:59:59.000Z

137

21H.346 The French Revolution and Napoleonic France, Spring 2000  

E-Print Network [OSTI]

Examines the origins, course, and consequences of the revolution which arose in France at the end of the eighteenth century and its Napoleonic sequel. Particular attention given to the interplay of politics, culture, and ...

Ravel, Jeffrey S.

138

A review of "Political Speaking Justified: Women Prophets and the English Revolution" By Teresa Feroli  

E-Print Network [OSTI]

214 SEVENTEENTH-CENTURY NEWS the 1640s and 1650s. And that complexity is, after all, a major source of our fascination with the period. Teresa Feroli. Political Speaking Justified: Women Prophets and the English Revolution. Newark, DE: University... the political sphere during the English Revolution and Restoration by claiming authority to speak based on their identity as women. Her aim, in part, is to locate female political consciousness much earlier than has historiographically been supposed. More...

Parker, B. F.

2007-01-01T23:59:59.000Z

139

Adaptor assembly for coupling turbine blades to rotor disks  

DOE Patents [OSTI]

An adaptor assembly for coupling a blade root of a turbine blade to a root slot of a rotor disk is described. The adaptor assembly includes a turbine blade having a blade root and an adaptor body having an adaptor root. The adaptor body defines a slot having an open end configured to receive the blade root of the turbine blade such that the adaptor root of the adaptor body and the blade root of the turbine blade are adjacent to one another when the blade root of the turbine blade is positioned within the slot. Both the adaptor root of the adaptor body and the blade root of the turbine blade are configured to be received within the root slot of the rotor disk.

Garcia-Crespo, Andres Jose; Delvaux, John McConnell

2014-09-23T23:59:59.000Z

140

DOE Solar Decathlon: Team Germany: Starting a Solar Revolution  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

surPLUShome at the U.S. Department of Energy Solar Decathlon 2009 with Silo House and the Washington Monument in the background. surPLUShome at the U.S. Department of Energy Solar Decathlon 2009 with Silo House and the Washington Monument in the background. Enlarge image Team Germany's surPLUShome took first place in Solar Decathlon 2009. It is now permanently placed on the Technische Universität Darmstadt campus. (Credit: Jim Tetro/U.S. Department of Energy Solar Decathlon) Who: Team Germany What: surPLUShome Where: Technische Universität Darmstadt El-Lissitzky-Str. 3 64287 Darmstadt, Deutschland Map This House Public tours: Not available Solar Decathlon 2009 Team Germany: Starting a Solar Revolution In June 2010, Team Germany's surPLUShome returned to the Technische Universität Darmstadt campus for permanent placement next to Solarhouse, from the U.S. Department of Energy Solar Decathlon 2007. As part of the

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Voigt's transformations and the beginning of the relativistic revolution  

E-Print Network [OSTI]

In 1887 W. Voigt published a paper on the Doppler effect, which marked the birth of the relativistic revolution. In his paper Voigt derived a set of spacetime transformations by demanding covariance to the homogeneous wave equation in inertial frames, and this was an application of the first postulate of special relativity. Voigt assumed in his derivation the invariance of the speed of light in inertial frames, and this is the second postulate of special relativity. He then applied the postulates of special relativity to the wave equation 18 years before Einstein explicitly enunciated these postulates. Voigt's transformations questioned the Newtonian notion of absolute time for the first time in physics by suggesting that the absolute time should be replaced by the non-absolute time $t'=t-vx/c^2$. Unfortunately, Voigt's 1887 paper was not appreciated by most physicists of that time. Voigt's transformations do not form a group and are an example of the conformal symmetry of spacetime. In the present paper we e...

Heras, Ricardo

2014-01-01T23:59:59.000Z

142

Embedded Real-Time Systems Electrical Model Quad Rotor UAV  

E-Print Network [OSTI]

Sys (2013-2014) #12;10 System SW view joystick QR PC link PC lift roll pitch yaw sensorsES joystickIn4073 Embedded Real-Time Systems Electrical Model Quad Rotor UAV #12;2 TE0300 FPGA System HW view), pitch rate (M), and yaw rate (N) (see qrsim for example!) x z y engine 4 engine 3 engine 2 engine 1 In

Langendoen, Koen

143

Investigation of Wind Turbine Rotor Concepts for Offshore Wind Farms  

Science Journals Connector (OSTI)

Current plans in offshore wind energy developments call for further reduction of cost of energy. In order to contribute to this goal, several wind turbine rotor concepts have been investigated. Assuming the future offshore wind turbines will operate only in the offshore wind farms, the rotor concepts are not only evaluated for their stand-alone performances and their potential in reducing the loads, but also for their performance in an offshore wind farm. In order to do that, the 10MW reference wind turbine designed in Innwind.EU project is chosen as baseline. Several rotor parameters have been modified and their influences are investigated for offshore wind turbine design purposes. This investigation is carried out as a conceptual parametrical study. All concepts are evaluated numerically with BOT (Blade optimisation tool) software in wind turbine level and with Farmflow software in wind farm level for two wind farm layouts. At the end, all these concepts are compared with each other in terms of their advantages and disadvantages.

Özlem Ceyhan; Francesco Grasso

2014-01-01T23:59:59.000Z

144

Investigation of rotor blade roughness effects on turbine performance  

SciTech Connect (OSTI)

The cold air test program was completed on the SSME (Space Shuttle Main Engine) HPFTP (High-Pressure Fuel Turbopump) turbine with production nozzle vane rings and polished coated rotor blades with a smooth surface finish of 30[mu]in. (0.76 [mu]m) rms (root mean square). The smooth blades were polished by an abrasive flow machining process. The test results were compared with the air test results from production rough-coated rotor blades with a surface finish of up to 400 [mu]in. (10.16 [mu]m) rms. Turbine efficiency was higher for the smooth blades over the entire range tested. Efficiency increased 2.1 percentage points at the SSME 104 percent RPL (Rated Power Level) conditions. This efficiency improvement could reduce the SSME HPFTP turbine inlet temperature by 57 R (32K), increasing turbine durability. The turbine flow parameter increased and the midspan outlet swirl angle became more axial with the smooth rotor blades.

Boynton, J.L.; Tabibzadeh, R. (Rockwell International Corp., Canoga Park, CA (United States). Rocketdyne Div.); Hudson, S.T. (NASA-Marshall Space Flight Center, Huntsville, AL (United States))

1993-07-01T23:59:59.000Z

145

Hydrodynamic Optimization Method and Design Code for Stall-Regulated Hydrokinetic Turbine Rotors  

SciTech Connect (OSTI)

This report describes the adaptation of a wind turbine performance code for use in the development of a general use design code and optimization method for stall-regulated horizontal-axis hydrokinetic turbine rotors. This rotor optimization code couples a modern genetic algorithm and blade-element momentum performance code in a user-friendly graphical user interface (GUI) that allows for rapid and intuitive design of optimal stall-regulated rotors. This optimization method calculates the optimal chord, twist, and hydrofoil distributions which maximize the hydrodynamic efficiency and ensure that the rotor produces an ideal power curve and avoids cavitation. Optimizing a rotor for maximum efficiency does not necessarily create a turbine with the lowest cost of energy, but maximizing the efficiency is an excellent criterion to use as a first pass in the design process. To test the capabilities of this optimization method, two conceptual rotors were designed which successfully met the design objectives.

Sale, D.; Jonkman, J.; Musial, W.

2009-08-01T23:59:59.000Z

146

Turning Waste Heat into Power: Ener-G-Rotors and the Entrepreneurial  

Broader source: Energy.gov (indexed) [DOE]

Turning Waste Heat into Power: Ener-G-Rotors and the Turning Waste Heat into Power: Ener-G-Rotors and the Entrepreneurial Mentorship Program Turning Waste Heat into Power: Ener-G-Rotors and the Entrepreneurial Mentorship Program March 16, 2011 - 4:55pm Addthis Ener-G-Rotors' 5kW prototype system | courtesy of Ener-G-Rotors Ener-G-Rotors' 5kW prototype system | courtesy of Ener-G-Rotors April Saylor April Saylor Former Digital Outreach Strategist, Office of Public Affairs If you've ever driven by an industrial plant, you've probably noticed big white plumes rising from the tops of the facilities. While it might look like smoke or pollution at first glance, most of the time those white plumes are comprised of steam and heat, or what Ener-G-Rotors CEO Michael Newell calls waste heat. Mike and the researchers of Ener-G-Rotors are finding ways to use this

147

Design Assessments of a Magnetic-geared Double-rotor Permanent Magnet Generator.  

E-Print Network [OSTI]

??The purpose of this research is to provide systematic design of a permanent magnet (PM) generator, by adopting the double-rotor and the coaxial magnetic gear… (more)

Chung, He-Yu

2013-01-01T23:59:59.000Z

148

E-Print Network 3.0 - adiabatic rotor model Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and simulation, both steady-state and transient, and rotor balancing of both subcritical and supercritical ... Source: Oak Ridge National Laboratory Fossil Energy Program...

149

E-Print Network 3.0 - asymmetric rotor model Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and simulation, both steady-state and transient, and rotor balancing of both subcritical and supercritical ... Source: Oak Ridge National Laboratory Fossil Energy Program...

150

Notes 05. Dynamics of a simple rotor-fluid film bearing system  

E-Print Network [OSTI]

?t e Static load u Rigid shaft Figure 5.1. Rigid rotor supported on journal bearings. (u) imbalance, (e) journal eccentricity Updated 09/04/09 ORIGIN 1:= rotor properties bearing 2MK rot DATA for rotor W T 500 lbf?:= Rotor weight Load per... cR? L? ? n ? ? n ? 60000?:= effective viscosity: deg-C (actual) ?_ n ? supply e ?? T eff n T supply ? () ? ?:= Journal Attitude angle ? n atan ? 1 ? n() 2 ?? 4 ? n ? ? ? ? ? ? ? 180 ? ?:= Calculations STATIC LOAD PERFORMANCE: journal cccentricity...

San Andres, Luis

2009-01-01T23:59:59.000Z

151

Toughness of Cr-Mo-V steels for steam-turbine rotors  

SciTech Connect (OSTI)

Cr-Mo-V steels are used extensively as the rotor material in the High Pressure and Intermediate Pressure Sections of modern steam turbines. The toughness of these rotors has a major influence on the reliability and efficiency of the turbine and the overall economy of operation and maintenance of the plant. The metallurgical factors affecting the toughness of the rotors and the methods to improve the toughness are now understood better than ever before. This paper will present a broad overview of the materials and design aspects of the toughness of Cr-Mo-V rotors with emphasis on the salient results of recent research programs aimed at improving their toughness.

Viswanathan, R.; Jaffee, R.I.

1982-04-01T23:59:59.000Z

152

Rotordynamic performance of a rotor supported on bump-type foil bearings: experiments and predictions  

E-Print Network [OSTI]

??????????...... 17 III-3 Test Rig for rotordynamic experiments of rotor supported on FBs???.. 19 III-4 Geometry of test rotor (0.98 kg, 2.12 lb)?????????????.. 20 III-5 Test rotor and test foil bearings for rotordynamic tests???????? 20 III-6 Miniature..., vertical plane (YFE)???????????????????? 48 IV-17 Waterfall plot of coastdown response for imbalance displacement u = 10.5 ?m (in phase, test A3). Air pressure at 34.4 kPa [5 psig] and measurements at rotor free end, vertical plane...

Rubio Tabares, Dario

2006-08-16T23:59:59.000Z

153

Tuning thermal mismatch between turbine rotor parts with a thermal medium  

DOE Patents [OSTI]

In a turbine rotor, an aft shaft wheel and the final-stage wheel of the rotor are coupled together, including by a rabbeted joint. During shutdown and startup of the turbine, a thermal mismatch between the aft shaft wheel and final-stage wheel is avoided by respectively heating and cooling the aft shaft wheel to maintain the thermal mismatch within acceptable limits, thereby avoiding opening of the rabbeted joint and the potential for unbalancing the rotor and rotor vibration. The thermal medium may be supplied by piping in the aft bearing cavity into the cavity between the forward closure plate and the aft shaft wheel.

Schmidt, Mark Christopher (Niskayuna, NY)

2001-01-01T23:59:59.000Z

154

Democracy in Ukraine after the Orange Revolution : youth activists' insights on past events, present efficacy, and future prospects.  

E-Print Network [OSTI]

??This study investigates the democratic developments in Ukraine beginning with the 2004 Orange Revolution. After its break-off from the Soviet empire, Ukraine began democratizing its… (more)

Shyyan, Vitaliy

2008-01-01T23:59:59.000Z

155

Numerical modeling of heat transfer and fluid flow in rotor-stator cavities with throughflow  

E-Print Network [OSTI]

Numerical modeling of heat transfer and fluid flow in rotor-stator cavities with throughflow S in a rotor-stator cavity subjected to a superimposed throughflow with heat transfer. Nu- merical predictions field from the heat transfer process. The turbulent flux is approximated by a gradient hypothesis

Boyer, Edmond

156

ISABE-2005-1214 Optimum Applications of Four-Port Wave Rotors for Gas Turbines Enhancement  

E-Print Network [OSTI]

1 ISABE-2005-1214 Optimum Applications of Four-Port Wave Rotors for Gas Turbines Enhancement Emmett investigations on wave rotor applications for gas turbines have been published, among them conceptual, analytical in the gas turbine industry. The results and conclusions are derived from a wide- range multi

Müller, Norbert

157

A complete and novel sensorless method for rotor position sensing in switched reluctance motor drives  

Science Journals Connector (OSTI)

This paper presents a complete and novel method which is designed to detect the rotor position at standstill and also low speeds in switched reluctance motor. The method applies a high frequency sine wave signal to the three successive stator pole windings ... Keywords: indirect rotor, position sensing in SRM, sensorless operation of SRM, switch reluctance motor

E. Afjei; M. M. Nezamabadi; A. Javeh

2005-07-01T23:59:59.000Z

158

H-G Diagram Based Rotor Parameters Identification for Induction Motors Thermal Monitoring  

E-Print Network [OSTI]

H-G Diagram Based Rotor Parameters Identification for Induction Motors Thermal Monitoring Mohamed: In this paper, an effective on-line method for induction motor parameter identification, especially rotor for each operating point. Computer simulations and experimental tests, carried out for a 4-kW four

Brest, Université de

159

RIS0-M-2432 SIMPLIFIED LAWS OF SIMIALRITY FOR WIND TURBINE ROTORS  

E-Print Network [OSTI]

comments are presented on comparison of stall-and pitch-regu- lated wind turbines and on two speed Shape factor (Weibull) Rotational speed Power Rotor radius Wind speed Rotor tip speed Tip speed ratio V is the wind speed at hub height, j> is the air density, #12;0 . 5 u ·p C

160

Dynamic Response of a Rotor-air Bearing System Due to Base Induced Periodic Motions  

E-Print Network [OSTI]

.............................................................. 20 Typical base motion induced accelerations..................................... 20 Rotor speed coast down tests .......................................................... 22... ............................................................. 16 6 Photograph of connection of shaker to test rig base plate.......................... 17 7 Typical measured base acceleration in time domain. Shaker excitation frequency: 6 Hz. Rotor speed = 34 krpm (567 Hz...

Niu, Yaying

2010-01-14T23:59:59.000Z

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

RECENT ADVANCES IN SMART-MATERIAL ROTOR CONTROL ACTUATION. Victor Giurgiutiu*,  

E-Print Network [OSTI]

RECENT ADVANCES IN SMART-MATERIAL ROTOR CONTROL ACTUATION. Victor Giurgiutiu*, University of South achievements in the application of active-materials actuation to counteract aeroelastic and vibration effects and capabilities is done first. Attention is focused on the smart rotor-blade applications. The induced twist

Giurgiutiu, Victor

162

CET2001 Customer Led Network Revolution (Smart Grid Project) | Open Energy  

Open Energy Info (EERE)

CET2001 Customer Led Network Revolution (Smart Grid Project) CET2001 Customer Led Network Revolution (Smart Grid Project) Jump to: navigation, search Project Name CET2001 Customer Led Network Revolution Country United Kingdom Coordinates 55.378052°, -3.435973° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":55.378052,"lon":-3.435973,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

163

Power to the People: A Consumer-Led Revolution in Energy Management  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Power to the People: A Consumer-Led Revolution in Energy Management Power to the People: A Consumer-Led Revolution in Energy Management Speaker(s): Scott McGaraghan Date: July 10, 2012 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Janie Page Do you love your thermostat? Nest Labs, founded by the people who brought you the iPod and the iPhone has just released a learning thermostat targeted at the iPhone generation. Initial enthusiasm and demand since the company's launch in October has been quite strong, hinting at the potential to change the conversation around smart grid implementation and residential energy management. Come to learn about what it really means to apply an Apple-style approach to residential energy management, and come ready to discuss and brainstorm on how to realize a consumer-led revolution

164

Biden Says U.S. Will Lead Energy Revolution | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Biden Says U.S. Will Lead Energy Revolution Biden Says U.S. Will Lead Energy Revolution Biden Says U.S. Will Lead Energy Revolution May 24, 2011 - 2:48pm Addthis Vice-President Joe Biden spoke about clean-energy partnerships between government scientists and private entrepreneurs at the National Renewable Energy Laboratory. | Department of Energy Photo | Courtesy of National Renewable Energy Laboratory | Photo by Dennis Schroeder | Public Domain | Vice-President Joe Biden spoke about clean-energy partnerships between government scientists and private entrepreneurs at the National Renewable Energy Laboratory. | Department of Energy Photo | Courtesy of National Renewable Energy Laboratory | Photo by Dennis Schroeder | Public Domain | Bill Scanlon Office of Public Affairs, National Renewable Energy Laboratory.

165

Biden Says U.S. Will Lead Energy Revolution | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Biden Says U.S. Will Lead Energy Revolution Biden Says U.S. Will Lead Energy Revolution Biden Says U.S. Will Lead Energy Revolution May 24, 2011 - 2:48pm Addthis Vice-President Joe Biden spoke about clean-energy partnerships between government scientists and private entrepreneurs at the National Renewable Energy Laboratory. | Department of Energy Photo | Courtesy of National Renewable Energy Laboratory | Photo by Dennis Schroeder | Public Domain | Vice-President Joe Biden spoke about clean-energy partnerships between government scientists and private entrepreneurs at the National Renewable Energy Laboratory. | Department of Energy Photo | Courtesy of National Renewable Energy Laboratory | Photo by Dennis Schroeder | Public Domain | Bill Scanlon Office of Public Affairs, National Renewable Energy Laboratory.

166

In the mIdst of an energy revolutIon, Purdue's world-class researchers lead the charge. we collaborate across a broad range of dIscIPlInes --to develoP  

E-Print Network [OSTI]

rechargIng IndIana's renewable energy revolutIon #12;enerGY solutions solar The U.S. Department of Energy expects that 10-15 percent of the nation's energy should be generated from solar sources by 2030. The target of the Purdue projects: · Researchersaredevelopingthinfilm solar cells that would have greater

Holland, Jeffrey

167

Planar velocity measurements in two rotorcraft flows are presented. The first is that of an isolated rotor  

E-Print Network [OSTI]

-light-based measurement system. The second flowfield is that of a rotor wake interacting with a fixed wing in a wind field. Isolated rotor in axial flight Substantial uncertainties remain in modeling the wake typical of a full-scale rotor wake. The clean periodicity of this flow allows capture of fundamental

168

VOL. 6, NO. 5, SEPT.-OCT. 1990 J. PROPULSION 621 Stator/Rotor Interaction in a Transonic Turbine  

E-Print Network [OSTI]

on the rotor blade, reflects upstream, and then reflects again off the stator blade Presented as Paper 88 and shows the large unsteadiness in the lift on the rotor blade. Basic NumericalMethod The flowfiVOL. 6, NO. 5, SEPT.-OCT. 1990 J. PROPULSION 621 Stator/Rotor Interaction in a Transonic Turbine

Giles, Mike

169

A rotor position estimator for switched reluctance motors using CMAC  

Science Journals Connector (OSTI)

This paper presents an approach to rotor position estimation in switched reluctance motors (SRMs) by using a cerebellum model articulation controller (CMAC). Previous research has shown that an artificial neural network (ANN) forms an efficient mapping structure through measurement of the flux linkages and currents for the phases. A CMAC is investigated in this paper in order to overcome the high computational power requirement problem that is encountered in a feedforward ANN based rotor position estimator. The CMAC structure does not contain neurons with activation functions, and all mathematical operations are performed without multiplication. These simplicities increase the throughput in real time implementation performed with conventional embedded controllers. However, the distributed memory structure of a CMAC requires more space. The issues involved in designing, training and implementing a CMAC are presented. In order to demonstrate the feasibility of the concept, a 20 kW, 6/4, three phase SRM is studied with training and evaluation data, which are obtained from a simulation program. A CMAC that is based on experimentally measured training and testing data for the same SRM is also used to demonstrate the promise of this approach.

Erkan Mese

2003-01-01T23:59:59.000Z

170

How to manage a revolution: Isaac Newton in the early twentieth century  

Science Journals Connector (OSTI)

...research-article Research articles 1007 187 99 How to manage a revolution: Isaac Newton in the...dramatic developments in physics came to be viewed as revolutionary, apparently...theories. British physicists were keen to promote quantum physics and relativity theory...

2014-01-01T23:59:59.000Z

171

Mental Strain as Field of Action in the 4th Industrial Revolution  

Science Journals Connector (OSTI)

Abstract Industrial revolutions have changed the society by a development of key-technologies. The vision of the 4th industrial revolution is triggered by technological concepts and solutions to realize a combination of the economy of scale with the economy of scope. This aim is also known as mass customization and is characterized by handling a high level of complexity with a total network integration of products and production processes. These technology-driven changes also lead to new fields of activity in the industrial science and the occupational psychology. The 4th industrial revolution intends to implement the collaboration between humans and machines. At the same time, processes are locally controlled and planned. For humans, this results to new work items. Resulting psychological effects should be investigated. This paper classifies the 4th industrial revolution systematically and describes future changes for employees. It derives the necessity of labor- psychological analysis of new key technologies like cyber physical systems. A theoretical foundation of a psychological work requirement analysis by using the VERA method is given. Finally, results of a preliminary study are carried out that will give the base for further studies.

Uwe Dombrowski; Tobias Wagner

2014-01-01T23:59:59.000Z

172

A Revolution That Will Transform How We Live, Work, And Think  

E-Print Network [OSTI]

#12;BIG DATA A Revolution That Will Transform How We Live, Work, And Think Keynotes of Chapter 56;Value With big data, the value of data is changing. Data's value shifts from its primary use to its, and where to build electric-vehicle service stations. 8/8/2013 14 #12;The reuse of data The value in data

Qiu, Robert Caiming

173

Metric 3D Reconstruction and Texture Acquisition of Surfaces of Revolution from a Single Uncalibrated View  

Science Journals Connector (OSTI)

Image analysis and computer vision can be effectively employed to recover the three-dimensional structure of imaged objects, together with their surface properties. In this paper, we address the problem of metric reconstruction and texture acquisition ... Keywords: Index Terms- Surface of revolution, camera self-calibration, single-view 3D metric reconstruction, texture acquisition, projective geometry, image-based modeling.

Carlo Colombo; Alberto Del Bimbo; Federico Pernici

2005-01-01T23:59:59.000Z

174

Nanorobotics is an emerging interdisciplinary technology area raising new scientific challenges and promising revolution-  

E-Print Network [OSTI]

and promising revolution- ary advancements in applications such as medicine, biology and industrial function, as well as for identifying ways of designing protein-based nano- mechanical systems. Industrial Nanorobotics The papers in the second group of this special issue are rel- evant to industrial nanorobotics (or

Mavroidis, Constantinos

175

Assessment of research needs for wind turbine rotor materials technology  

SciTech Connect (OSTI)

Wind-driven power systems is a renewable energy technology that is still in the early stages of development. Wind power plants installed in early 1980s suffered structural failures chiefly because of incomplete understanding of wind forces (turbulent), in some cases because of poor product quality. Failures of rotor blades are now somewhat better understood. This committee has examined the experience base accumulated by wind turbines and the R and D programs sponsored by DOE. It is concluded that a wind energy system such as is described is within the capability of engineering practice; however because of certain gaps in knowledge, and the presence of only one major integrated manufacturer of wind power machines in the USA, a DOE R and D investment is still required.

Not Available

1991-01-01T23:59:59.000Z

176

Cooling system for a bearing of a turbine rotor  

DOE Patents [OSTI]

In a gas turbine, a bore tube assembly radially inwardly of an aft bearing conveys cooling steam to the buckets of the turbine and returns the cooling steam to a return. To cool the bearing and thermally insulate the bearing from the cooling steam paths, a radiation shield is spaced from the bore tube assembly by a dead air gap. Additionally, an air passageway is provided between the radiation shield and the inner surface of an aft shaft forming part of the rotor. Air is supplied from an inlet for flow along the passage and radially outwardly through bores in the aft shaft disk to cool the bearing and insulate it from transfer of heat from the cooling steam.

Schmidt, Mark Christopher (Niskayuna, NY)

2002-01-01T23:59:59.000Z

177

Axial thermal medium delivery tubes and retention plates for a gas turbine rotor  

DOE Patents [OSTI]

In a multi-stage turbine rotor, tubes are disposed in openings adjacent the rotor rim for flowing a thermal medium to rotor buckets and returning spent thermal medium. The tubes have axially spaced lands of predetermined wall thickness with thin-walled tube sections between the lands and of increasing thickness from the forward to the aft ends of the tubes. A pair of retention plates are carried on the aft end face of the aft wheel and straddle the tube and engage against a shoulder on the tube to preclude displacement of the tube in an aft direction.

Mashey, Thomas Charles (Coxsackie, NY)

2002-01-01T23:59:59.000Z

178

Rotor dynamic analysis of multi-line systems using the polynomial transfer matrix method  

E-Print Network [OSTI]

COEFFICIENTS 66 APPENDIX 3 - PROGRAM TEST CASES 72 VITA 90 LIST OF FIGURES FIGURE Page 1 - Two Line Rotor Model and Station 10 2 ? X-Z Plane Sign Convention 12 3 - Y-Z Plane Sign Convention 4 ? Mass Station Transfer Matrix 5 ? Beam Station Transfer... inch Diameter Shaft Free-Free Case 75 3 - Three Disk Rotor Critical Speeds - No Foundations 76 4 - 3 Disk Rotor Natural Frequencies With Foundations 78 5 - 2 inch Shaft Model With Foundations 82 6 ? Roots Before Dividing Out Correction Polynomial 83...

Troxler, Paul Joseph

2012-06-07T23:59:59.000Z

179

Design trade-off study between efficiency and rotor forcing attenuation in a transonic turbine stage  

Science Journals Connector (OSTI)

Abstract A multi-objective optimisation procedure was applied to the 3D design of a transonic turbine vane row, considering efficiency and stator outlet pressure distortion, which is directly related to the forcing induced in the rotor. The characteristic features that define different individuals along the Pareto Front were described, analysing the differences between high efficiency airfoils and low interaction. Pressure distortion was assessed by means of a model that requires only of the computation the steady flow field in the domain of the stator. The reduction of aerodynamic rotor forcing was validated via unsteady multistage aerodynamic computations carried out with NUMECA FINE TM / Turbo . A well known loss prediction method was used to perform total loss decomposition to quantify the influence on efficiency of reducing rotor forcing. Results show that when striving for efficiency, the rotor was affected by few, but intense shocks. On the other hand, when the objective was the minimisation of distortion, multiple shocks appeared.

Ricardo Puente; Guillermo Paniagua; Tom Verstraete

2014-01-01T23:59:59.000Z

180

UPWIND, Aerodynamics and aero-elasticity Rotor aerodynamics in atmospheric shear flow  

E-Print Network [OSTI]

UPWIND, Aerodynamics and aero-elasticity Rotor aerodynamics in atmospheric shear flow Niels N codes for wind turbines utilize aerodynamics based on BEM methods, see [1, 2]. For modern large scale

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Study on Rotor-Side Converter of Doubly Fed Induction Generator  

Science Journals Connector (OSTI)

The doubly fed induction generator has been widely used in wind power ... power from the wind energer. But the generator speed changes, the output frequency will chang ... alter rotor excitation current, to maint...

Haihui Song; Tian De

2012-01-01T23:59:59.000Z

182

Identification of rotordynamic forces in a flexible rotor system using magnetic bearings  

E-Print Network [OSTI]

Methods are presented for parameter identification of an annular gas seal on a flexiblerotor test rig. Dynamic loads are applied by magnetic bearings (MBs) that support the rotor. MB forces are measured using fiber-optic strain gauges...

Zutavern, Zachary Scott

2009-06-02T23:59:59.000Z

183

Deflection Shape Reconstructions of a Rotating Five-blade Helicopter Rotor from TLDV Measurements  

SciTech Connect (OSTI)

Helicopters are aircraft machines which are subjected to high level of vibrations, mainly due to spinning rotors. These are made of two or more blades attached by hinges to a central hub, which can make the dynamic behaviour difficult to study. However, they share some common dynamic properties with the ones expected in bladed discs, thereby the analytical modelling of rotors can be performed using some assumptions as the ones adopted for the bladed discs. This paper presents results of a vibrations study performed on a scaled helicopter rotor model which was rotating at a fix rotational speed and excited by an air jet. A simplified analytical model of that rotor was also produced to help the identifications of the vibration patterns measured using a single point tracking-SLDV measurement method.

Fioretti, A.; Castellini, P.; Tomasini, E. P. [Universita Politecnica delle Marche, Dipartimento di Meccanica, Ancona (Italy); Di Maio, D.; Ewins, D. J. [University of Bristol, Aerospace Department, Bristol (United Kingdom)

2010-05-28T23:59:59.000Z

184

An efficient algorithm for blade loss simulations applied to a high-order rotor dynamics problem  

E-Print Network [OSTI]

In this thesis, a novel approach is presented for blade loss simulation of an aircraft gas turbine rotor mounted on rolling element bearings with squeeze film dampers, seal rub and enclosed in a flexible housing. The modal truncation augmentation...

Parthasarathy, Nikhil Kaushik

2004-09-30T23:59:59.000Z

185

Spin-rotor Interpretation of Identical Bands and Quantized Alignment in Superdeformed A $\\approx$ 190 Nuclei  

E-Print Network [OSTI]

The ``identical'' bands in superdeformed mercury, thallium, and lead nuclei are interpreted as examples of orbital angular momentum rotors with the weak spin-orbit coupling of pseudo-$SU(3)$ symmetries and supersymmetries.

J. A. Cizewski; R. Bijker

1995-06-02T23:59:59.000Z

186

A study of chaos in a rotor system supported by ball bearings  

E-Print Network [OSTI]

. Numerous researchers have published a myriad of papers on the application of chaos theory to mechanical, electrical and biological systems. However, control theories of chaos have been in existence for only a decade and have not been applied to rotor...

Ortiz, Steven Rey

2013-02-22T23:59:59.000Z

187

Effect of Cooling Flow on the Operation of a Hot Rotor-Gas Foil Bearing System  

E-Print Network [OSTI]

Gas foil bearings (GFBs) operating at high temperature rely on thermal management procedures that supply needed cooling flow streams to keep the bearing and rotor from overheating. Poor thermal management not only makes systems inefficient...

Ryu, Keun

2012-02-14T23:59:59.000Z

188

Observation of coherence revival and fidelity saturation in a delta-kicked rotor potential  

E-Print Network [OSTI]

We experimentally investigate the effect of atomic $\\delta$-kicked rotor potentials on the mutual coherence between wavepackets in an atom interferometer. The differential action of the kicked rotor degrades the mutual coherence, leading to a reduction of the interferometry fringe visibility; however, when the repetition rate of the kicked rotor is at or near the quantum resonance, we observe revival of matter-wave coherence as the number of kicks increases, resulting in non-vanishing coherence in the large kick number limit. This coherence saturation effect reflects a saturation of fidelity decay due to momentum displacements in deep quantum regime. The saturation effect is accompanied with an invariant distribution of matter-wave coherence under the kicked rotor perturbations.

Saijun Wu; Alexey Tonyushkin; Mara G. Prentiss

2008-01-03T23:59:59.000Z

189

An embedded controller for quad-rotor flying robots running distributed algorithms  

E-Print Network [OSTI]

Multiple collaborating quad-rotor flying robots are useful in a broad range of applications, from surveillance with onboard cameras to reconfiguration of wireless networks. For these applications, it is often advantageous ...

Julian, Brian John

2009-01-01T23:59:59.000Z

190

Molecular dynamics of a grid-mounted molecular dipolar rotor in a rotating electric field  

Science Journals Connector (OSTI)

...interesting. Analyses (23–25) of a one-dimensional string of rotors interacting by electrostatic forces suggest...consisting of two concentric carbon nanotubes in a linearly oscillating electric field. Our work differs in several respects...

Jaroslav Vacek; Josef Michl

2001-01-01T23:59:59.000Z

191

How to improve open rotor aerodynamics at cruise and take-off  

E-Print Network [OSTI]

1 Copyright © 2014 University of Cambridge DRAFT – HOW TO IMPROVE OPEN ROTOR AERODYNAMICS AT CRUISE AND TAKE-OFF Cesare Hall, Alexios Zachariadis, Tobias Brandvik, Nishad Sohoni cah1003@cam.ac.uk University of Cambridge, Whittle... Laboratory 1 JJ Thomson Avenue, Cambridge CB3 0DY ABSTRACT A key challenge in open rotor design is getting the optimum aerodynamics at both the cruise and take-off conditions. This is particularly difficult because the operation and the requirements...

Hall, Cesare; Zachariadis, Alexios; Brandvik, Tobias; Sohoni, Nishad

192

Measurements of imbalance response for a rigid rotor fully supported on squeeze film dampers  

E-Print Network [OSTI]

MEASUREMENTS OF IMBALANCE RESPONSE FOR A RIGID ROTOR FULLY SUPPORTED ON SQUEEZE FILM DAMPERS A Thesis by DANIEL ROGER LUBELL Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE December 2000 Major Subject: Mechanical Engineering MEASUREMENTS OF IMBALANCE RESPONSE FORA RIGID ROTOR FULLY SUPPORTED ON SQUEEZE FILM DAMPERS by DANIEL ROGER LUBELL Submitted to Texas AlbM University in partial...

Lubell, Daniel Roger

2012-06-07T23:59:59.000Z

193

Genetic icing effects on forward flight performance of a model helicopter rotor  

E-Print Network [OSTI]

GENERIC ICING EFFECTS ON FORWARD FLIGHT PERFORMANCE OF A MODEL HELICOPTER ROTOR A Thesis ANA FIORELLA TINETTI-SANCHEZ Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE December 1987 Major Subject: Aerospace Engineering GENERIC ICING EFFECTS ON FORWARD FLIGHT PERFORMANCE OF A MODEL HELICOPTER ROTOR A Thesis by ANA FIORELLA TINETTI-SANCHEZ Approved as to style and content by: Kenneth D. Korkan...

Tinetti-Sanchez, Ana Fiorella

2012-06-07T23:59:59.000Z

194

The Rise And Fall Of The Muslim Brotherhood In The Egyptian Revolution: The Interplay of Narrative And Other Factors  

E-Print Network [OSTI]

in the aftermath of revolution is that leaders adapt their narrative (including policies) to the changed context (revolutionaries as rulers) and reform existing institutions. Historically, the failure to successfully adapt narrative results in instability. After...

Tombaugh, William

2013-08-31T23:59:59.000Z

195

Parameter identification for joint elements in a revolute-joint detector manipulator.  

SciTech Connect (OSTI)

A revolute-joint robot is being developed for the spatial positioning of an x-ray detector at the Advanced Photon Source. Commercially available revolute-joint manipulators do not meet our size, positioning, or payload specifications. One idea being considered is the modification of a commercially available robot, with the goal of improving the repeatability and trajectory accuracy. Theoretical, computational, and experimental procedures are being used to (1) identify, (2) simulate the dynamics of an existing robot system using a multibody approach, and eventually (3) design an improved version, with low dynamic positioning uncertainty. A key aspect of the modeling and performance prediction is accurate stiffness and damping values for the robot joints. This paper discusses the experimental identification of the stiffness and damping parameters for one robot harmonic drive joint.

Preissner, C.; Shu, D.; Royston, T.; Experimental Facilities Division (APS); Univ. of Illinois at Chicago

2005-01-01T23:59:59.000Z

196

A Hierarchy of Linear Threshold Models for the Spread of Political Revolutions on Social Networks  

E-Print Network [OSTI]

We study a linear threshold agent-based model (ABM) for the spread of political revolutions on social networks using empirical network data. We propose new techniques for building a hierarchy of simplified ordinary differential equation (ODE) based models that aim to capture essential features of the ABM, including effects of the actual networks, and give insight in the parameter regime transitions of the ABM. We relate the ABM and the hierarchy of models to a population-level compartmental ODE model that we proposed previously for the spread of political revolutions [1], which is shown to be mathematically consistent with the proposed ABM and provides a way to analyze the global behaviour of the ABM. This consistency with the linear threshold ABM also provides further justification a posteriori for the compartmental model of [1]. Extending concepts from epidemiological modelling, we define a basic reproduction number $R_0$ for the linear threshold ABM and apply it to predict ABM behaviour on empirical networ...

Lang, John C

2015-01-01T23:59:59.000Z

197

Dynamic analysis of shells of revolution submerged in an acoustic medium by the finite element method  

E-Print Network [OSTI]

of the spherical shell transformation matrix relating (q} and (u) for an element generalized added mass matrix due to radiated pressure matrix relating (q) and (I) for an element unknown source strength velocity of sound in fluid coupled equivalent nodal load... A method 1s presented for the evaluation of the displacements and the surface pressure which are induced by the harmonic exc1tation of a shell of revolution submerged in an acoustic medium. The method utilizes a source distribution approach...

Ng, Chi Kin

1978-01-01T23:59:59.000Z

198

Literacy, orality annd the digital revolution: history and prospects for university undergraduate research fellows  

E-Print Network [OSTI]

LITERACY, ORALITY AND THE DIGITAL REVOLUTION: HISTORY AND PROSPECTS FOR UNIVERSITY UNDERGRADUATE RESEARCH FELLOWS A Senior Honors Thesis by J. GARRETT CORNEL I SON Submitted to the Office of Honors Programs & Academic Scholarships Texas A8 M... FELLOWS A Senior Honors Thesis by J. GARRETT CORNELISON Submitted to the Office of Honors Programs & Academic Scholarships Texas A&M University In partial fulfillment of the requirements of the UNIVERSITY UNDERGRADUATE RESEARCH FELLOWS Approved...

Cornelison, J. Garrett

2013-02-22T23:59:59.000Z

199

Control system for a wound-rotor motor  

DOE Patents [OSTI]

A load switching circuit for switching two or more transformer taps under load carrying conditions includes first and second parallel connected bridge rectifier circuits which control the selective connection of a direct current load to taps of a transformer. The first bridge circuit is normally conducting so that the load is connected to a first tap through the first bridge circuit. To transfer the load to the second tap, a switch is operable to connect the second bridge circuit to a second tap, and when the second bridge circuit begins to conduct, the first bridge circuit ceases conduction because the potential at the second tap is higher than the potential at the first tap, and the load is thus connected to the second tap through the second bridge circuit. The load switching circuit is applicable in a motor speed controller for a wound-rotor motor for effecting tap switching as a function of motor speed while providing a stepless motor speed control characteristic.

Ellis, James N. (Chatsworth, CA)

1983-01-01T23:59:59.000Z

200

The axial gas-dynamic forces acting on the rotor of a small gas-turbine engine  

Science Journals Connector (OSTI)

The exact determination is discussed of the axial gas-dynamic forces acting on the rotor of a gas-turbine engine (GTE), which influence reliability....

S. S. Evgen’ev; R. R. Zalyaev

2007-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Operation of a test bed axial-gap brushless dc rotor with a superconducting stator  

SciTech Connect (OSTI)

A variable-speed axial-gap motor with a stator consisting of four liquid helium cooled superconducting electromagnets (two pole pairs) was built and proof tested up to 608 rpm in November 1990 as a tool for joint industry-laboratory evaluation of coils fabricated from high-temperature oxide superconductors. A second rotor was fabricated with improved materia winding configuration, and wire type, and the drive system was modified to eliminate current spiking. The modified motor was characterized to design speed, 188 rad/s (1800 rpm), to acquire a performance baseline for future comparison with that of high-temperature superconducting (HIS) wire. As it becomes commercially available, HTS wire will replace the low-temperature electromagnet wire in a stator modified to control wire temperatures between 4 K and 77 K. Measurements of the superconducting electromagnetic field and locked rotor torque as functions of cryocurrent and dc current through two phases of the rotor, respectively, provided data to estimate power that could be developed by the rotor. Back emf and parasitic mechanical and electromagnetic drag torques were measured as functions of angular velocity to calculate actual rotor power developed and to quantify losses, which reduce the motor`s efficiency. A detailed measurement of motor power at design speed confirmed the developed power equation. When subsequently operated at the 33-A maximum available rotor current, the motor delivered 15.3 kill (20.5 hp) to the load. In a final test, the cryostat was operated at 2500 A, 200 A below its critical current. At rotor design current of 60 A and 2500 A stator current, the extrapolated developed power would be 44.2 kill (59.2 hp) with 94% efficiency.

McKeever, J.W.; Sohns, C.W.; Schwenterly, S.W.; Young, R.W. Sr.; Campbell, V.W.; Hickey, M.H.; Ott, G.W. [Oak Ridge National Lab., TN (United States); Bailey, J.M. [Tennessee Univ., Knoxville, TN (United States)

1993-08-01T23:59:59.000Z

202

Vibration based damage detection of rotor blades in a gas turbine engine  

Science Journals Connector (OSTI)

Abstract This paper describes the problems concerning turbine rotor blade vibration that seriously impact the structural integrity of a developmental aero gas turbine. Experimental determination of vibration characteristics of rotor blades in an engine is very important from fatigue failure considerations. The blades under investigation are fabricated from nickel base super alloy through directionally solidified investment casting process. The blade surfaces are coated with platinum aluminide for oxidation protection. A three dimensional finite element modal analysis on a bladed disk was performed to know the likely blade resonances for a particular design in the speed range of operation. Experiments were conducted to assess vibration characteristics of bladed disk rotor during engine tests. Rotor blade vibrations were measured using non-intrusive stress measurement system, an indirect method of blade vibration measurement utilizing blade tip timing technique. Abnormalities observed in the vibration characteristics of the blade tip timing data measured during engine tests were used to detect the blade damage. Upon disassembly of the engine and subsequent fluorescent penetrant inspection, it was observed that three blades of the rotor assembly were identified to have damaged. These are the blades that exhibited vibration abnormalities as a result of large resonant vibration response while engine tests. Further, fractographic analysis performed on the blades revealed the mechanism of blade failures as fatigue related. The root cause of blade failure is established to be high cycle fatigue from the engine run data history although the blades were put into service for just 6 h of engine operation.

S. Madhavan; Rajeev Jain; C. Sujatha; A.S. Sekhar

2014-01-01T23:59:59.000Z

203

WindPACT Turbine Rotor Design Study: June 2000--June 2002 (Revised)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

WindPACT Turbine Rotor WindPACT Turbine Rotor Design Study June 2000 - June 2002 D.J. Malcolm Global Energy Concepts, LLC Kirkland, Washington A.C. Hansen Windward Engineering Salt Lake City, Utah Subcontract Report NREL/SR-500-32495 Revised April 2006 WindPACT Turbine Rotor Design Study June 2000 - June 2002 D.J. Malcolm Global Energy Concepts, LLC Kirkland, Washington A.C. Hansen Windward Engineering Salt Lake City, Utah NREL Technical Monitor: A. Laxson Prepared under Subcontract No. YAT-0-30213-01 Subcontract Report NREL/SR-500-32495 Revised April 2006 National Renewable Energy Laboratory 1617 Cole Boulevard, Golden, Colorado 80401-3393 303-275-3000 * www.nrel.gov Operated for the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy by Midwest Research Institute * Battelle

204

Translational/rotational coupling of the hindered CH 3 quantum-rotor in lithium acetate dihydrate  

Science Journals Connector (OSTI)

The multiplet structure of the rotational-tunneling peaks in the inelastic neutron-scattering spectrum of lithium acetate is widely regarded as evidence of coupled pairs of CH 3 quantum rotors. However our molecular-mechanics study which has no adjustable parameters reveals that rotor/rotor coupling is less important than translational/rotational coupling. In order to remain at a potential-energy minimum during CH 3 group reorientation the center-of-mass of this group follows an almost circular path around its time-average position. The energy levels from this dynamical model reproduce the observed tunneling-transitions reasonably well and the predicted rectangular density distribution of the three methyl H-atoms is in good agreement with that measured by single-crystalneutron diffraction.

P. Schiebel; G. J. Kearley; M. R. Johnson

1998-01-01T23:59:59.000Z

205

Scnarios d'interaction rotor/stator pour un compresseur haute pression d'un moteur d'hlicoptre  

E-Print Network [OSTI]

Scénarios d'interaction rotor/stator pour un compresseur haute pression d'un moteur d'hélicoptère A plus de prévoir les zones d'interaction. Rotor-stator interaction scenarios for the centrifugal in the centrifugal com- pressor of helicopter engines when structural contacts occur between the blade

Boyer, Edmond

206

New membranes could speed the biofuels conversion process and reduce cost  

SciTech Connect (OSTI)

ORNL researchers have developed a new class of membranes that could enable faster, more cost efficient biofuels production. These membranes are tunable at the nanopore level and have potential uses in separating water from fuel and acid from bio-oils. The membrane materials technology just won an R&D 100 award. ORNL and NREL are partnering, with support from the DOE Bioenergy Technologies Office, to determine the best uses of these membranes to speed the biofuels conversion process. Development of the membranes was funded by DOE BETO and ORNL's Laboratory Directed Research and Development Program.

Hu, Michael

2014-07-23T23:59:59.000Z

207

New membranes could speed the biofuels conversion process and reduce cost  

ScienceCinema (OSTI)

ORNL researchers have developed a new class of membranes that could enable faster, more cost efficient biofuels production. These membranes are tunable at the nanopore level and have potential uses in separating water from fuel and acid from bio-oils. The membrane materials technology just won an R&D 100 award. ORNL and NREL are partnering, with support from the DOE Bioenergy Technologies Office, to determine the best uses of these membranes to speed the biofuels conversion process. Development of the membranes was funded by DOE BETO and ORNL's Laboratory Directed Research and Development Program.

Hu, Michael

2014-08-06T23:59:59.000Z

208

Sun Yat-sen University in Moscow and the Chinese Revolution: A Personal Account  

E-Print Network [OSTI]

Sun Yat-sen University in Moscow and the Chinese Revolution A Personal Account Yueh Sheng INTERNATIONAL STUDIES, EAST ASIAN SERIES RESEARCH PUBLICATION, NUMBER SEVEN CENTER EOR EAST ASIAN STUDIES THE UNIVERSITY OF KANSAS UNIVERSITY.... $2.50 5. AKASHI, YOJI The Nanyang Chinese National Salvation Movement, 1937-1941. $6.00 6. LEE, CHAE-JIN Communist China's Policy Toward Laos: A Case Study, 1954-67. $5.00 7. SHENG, YUEH Sun Yat-sen University in Moscow and the Chinese...

Sheng, Yueh

1971-01-01T23:59:59.000Z

209

A review of "Commonwealth Principles: Republican Writing of the English Revolution." by Jonathan Scott,  

E-Print Network [OSTI]

28 SEVENTEENTH-CENTURY NEWS Jonathan Scott. Commonwealth Principles: Republican Writing of the English Revolution. Cambridge and New York: Cambridge University Press, 2004. xii + 402 pp. $75.00. Review by CHARLES W. A. PRIOR, UNIVERSITY OF HULL... in no way disposed to require the definition of En- gland as a polis or the Englishman as a citizen? (334). To a very large extent, Jonathan Scott?s mission is to show how this process of domestication took place, and the result is a thought...

Prior, Charles W. A.

2007-01-01T23:59:59.000Z

210

Numerical methods of integration applied in the nonlinear dynamic analysis of shells of revolution  

E-Print Network [OSTI]

structural bel&avior a&d therefore cannot be used for nonlinear analyses. lhe second nðod of dynamic analysis uses numerical integra- tion of the equations of notion wit'bout necessitating a transforma- tion of coordinates. Tne numerical integration...!riinear beam analysis {first vibratory mode only) with the most prc!! ising methods b ing programmed for shell analy! es. Rea- listic test problems are used to evaluate three of the numerical integration procedures as applied in shell of revolution analyses...

Tillerson, Joe Richard

2012-06-07T23:59:59.000Z

211

The energy services revolution: New opportunities for commercial and industrial end-users  

SciTech Connect (OSTI)

The changing energy services industry presents significant cost-control opportunities for end-users. However, the transition period from a monopoly to a deregulated market will be chaotic and confusing. For end-users, knowing who to turn to is the first step in taking advantage of the energy services revolution. For energy and energy services providers, bridging the gap between what suppliers perceive as key customer needs and what large energy users actually want will be the key in producing mutually successful ventures.

Hoggard, J.

1997-07-01T23:59:59.000Z

212

Improved Structure and Fabrication of Large, High-Power KHPS Rotors - Final Scientific/Technical Report  

SciTech Connect (OSTI)

Verdant Power, Inc, working in partnership with the National Renewable Energy Laboratory (NREL), Sandia National Laboratories (SNL), and the University of Minnesota St. Anthony Falls Laboratory (SAFL), among other partners, used evolving Computational Fluid Dynamics (CFD) and Finite Element Analysis (FEA) models and techniques to improve the structure and fabrication of large, high-power composite Kinetic Hydropower System (KHPS) rotor blades. The objectives of the project were to: design; analyze; develop for manufacture and fabricate; and thoroughly test, in the lab and at full scale in the water, the improved KHPS rotor blade.

Corren, Dean [Verdant Power, Inc.; Colby, Jonathan [Verdant Power, Inc.; Adonizio, Mary Ann [Verdant Power, Inc.

2013-01-29T23:59:59.000Z

213

Control strategies of doubly fed induction generator-based wind turbine system with new rotor current protection topology  

Science Journals Connector (OSTI)

A protection scheme of a doubly fed induction generator (DFIG) based wind turbine system during faults is crowbar activation. With this protection the rotor side converter (RSC) is temporarily disconnected and its vector control over the stator active and reactive power is lost leading to poor power quality at the point of common coupling (PCC). This paper presents a new protection scheme for transient rotor current to improve the performance of DFIG during grid disturbance. The new scheme consisting of a crowbar and series circuit is connected between the rotor windings and RSC to enhance the low voltage ride-through capability of DFIG. The proposed scheme successfully limits the transient rotor current and dc-link voltage and a disconnection of RSC from the rotor windings is avoided during fault. Additionally RSC and grid-side converter controllers are modified to improve the voltage at PCC. Simulations on matlab/Simulink verify the effectiveness of the proposed scheme.

Jackson John Justo; Kyoung-Soo Ro

2012-01-01T23:59:59.000Z

214

To cite this document: Barbiero, Franck and Vincent, Franois and Deloues, Thierry and Letestu, Franck Effects of rotor blade modulation on GNSS anti-jamming algorithms.  

E-Print Network [OSTI]

, Franck Effects of rotor blade modulation on GNSS anti-jamming algorithms. (2014) In: ION International be sent to the repository administrator: staff-oatao@inp-toulouse.fr #12;Effects of rotor blade modulation rotating bodies, the signal undergo complex and non-stationary effects called Rotor Blade Modulation (RBM

Mailhes, Corinne

215

Revolution Now  

Broader source: Energy.gov (indexed) [DOE]

Clean Energy Technologies September 17, 2013 Lead author Dr. Levi Tillemann, Special Advisor for Policy and International Affairs Contributors Fredric Beck, DOE Wind Technology...

216

Revolution Now  

Energy Savers [EERE]

to produce at a lower capacity factor than nuclear generators (average for onshore wind turbines in the US from 2006-2013 was 32%). For more information on capacity factors, see...

217

Digital Revolutions  

Science Journals Connector (OSTI)

......cutting-edge work in this field such as augmented reality, artificial intelligence, wearable technologies, robotics and 3D printing. Drawing these at times disparate subjects and projects together to make a cohesive whole is no easy feat. The curator......

Catherine Mason

2014-01-01T23:59:59.000Z

218

Chu: U.S. Can "Lead this New Industrial Revolution" in Clean Energy |  

Broader source: Energy.gov (indexed) [DOE]

Chu: U.S. Can "Lead this New Industrial Revolution" in Clean Energy Chu: U.S. Can "Lead this New Industrial Revolution" in Clean Energy Chu: U.S. Can "Lead this New Industrial Revolution" in Clean Energy July 22, 2009 - 12:00am Addthis WASHINGTON, DC- The Wednesday, July 22, 2009 edition of the Richmond Times-Dispatch includes the following opinion piece from Energy Secretary Steven Chu: Cleaning Up: Energy and Climate Bill Will Boost the Economy US ENERGY SECRETARY STEVEN CHU Published: July 22, 2009 Over the next few months, Congress will decide on historic energy legislation that would create a generation of clean-energy jobs here in America, reduce our dependence on foreign oil, and prevent the worst effects of climate change. I believe passing a strong energy and climate bill is the single most important step we could take to secure our economic

219

Advancing our world. It's the Washington Way. The world is in the middle of a materials revolution. Advances in materials have preceded almost  

E-Print Network [OSTI]

Advancing our world. It's the Washington Way. The world is in the middle of a materials revolution. Advances in materials have preceded almost every technological leap since the beginning of civilization of Washington's Materials Science & Engineering department is at the heart of this revolution preparing our

Anderson, Richard

220

Modeling of residual service life of gas turbine rotors for minimizing replacement costs  

Science Journals Connector (OSTI)

One of the most catastrophic failures observed in gas turbine powered electrical powerplants is the fracture of the turbine rotor. A simplified model consisting of 3 macro-elements is suggested to model the dynamical behavior of the shaft with a propagating ... Keywords: crack propagation, gas-turbine, modeling, power-plant, replacement costs

Eusebia Zouridaki; Vasilios Spitas; Christos Spitas

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Experimental response of a rotor supported on Rayleigh step gas bearings  

E-Print Network [OSTI]

contact during start-up and shutdown. Quick lifting of the rotor in the air bearings reduces the wear and damage of solid surfaces for long durability of the bearings under cyclic start/stop operation. 6 Sastri et al. [27] study the tribological...

Zhu, Xuehua

2004-11-15T23:59:59.000Z

222

Toward a Better Understanding of Ducted Rotor Antitorque and Directional Control in Forward Flight  

E-Print Network [OSTI]

of the Core Automatic Flight Control System (CAFCS) mode. Figure 1 shows a sustained, large-amplitude 1-Hz yaw ABSTRACT Despite decades of very successful yaw-control and anti-torque applications, the aerodynamics dramatic. From a handling-qualities perspective, the ducted rotor provides the loads capacity required

223

Horizontal-axis wind-system rotor performance model comparison: a compendium  

SciTech Connect (OSTI)

This compendium consists of four reports, the purpose of which is to evaluate performance prediction methods for horizontal-axis wind turbines. The reports were prepared by four separate contractors. Oregon State University, AeroVironment, Inc., Aerospace Systems, Inc., and United Technologies Research Center (UTRC). Three of the four contractors used a blade-element/momentum analysis, while the fourth (UTRC) utilized a lifting line/prescribed wake analysis. These contractors were to apply their prediction methods to two rotors, that of the Enertech 1500 and that of the 1/3-scale UTRC 8 kW turbines. Results from the four prediction methods are compared with actual test data gathered via Controlled Velocity Testing (CVT), carried out by the Rocky Flats Wind Energy Research Center, operated by Rockwell International for the US Department of Energy. The conclusions of the four reports are reviewed in an introduction prepared by Rockwell International. For the Enertech 1500, rotor performance predictions closely agreed with CVT data. Yet, because of the lack of high tip speed ratio data, verification of the Glauert momentum theory was not possible. Predictions regarding the UTRC 1/3 scale 8 kW rotor did not agree well with test results. The reasons cited for the discrepancies center on inadequate airfoil section data and the varying blade pitch angles of the unique UTRC flexbeam rotor.

Not Available

1983-02-01T23:59:59.000Z

224

Concurrent Aerodynamic Optimization of Rotor Blades Using a Nash Game Method  

E-Print Network [OSTI]

Concurrent Aerodynamic Optimization of Rotor Blades Using a Nash Game Method Enric Roca Le´on Ph Aerodynamics Leader, Airbus Helicopter, Marignane, France Michel Costes Research Engineer, ONERA, Meudon OF THE AMERICAN HELICOPTER SOCIETY Abstract A multi-objective strategy adapted to the aerodynamic concurrent

Paris-Sud XI, Université de

225

Contribution of restricted rotors to quantum sieving of hydrogen isotopes B. C. Hathorn,1  

E-Print Network [OSTI]

have come to the forefront as a possible storage medium for hydrogen for fuel-cell de- vices. A number of isotopically substituted hydrogen molecules adsorbed into single-walled car- bon nanotubes are calculated usingContribution of restricted rotors to quantum sieving of hydrogen isotopes B. C. Hathorn,1 B. G

Hathorn, Bryan C.

226

2010 Asia-Pacific International Symposium on Aerospace Technology Rotor-stator interaction broadband noise  

E-Print Network [OSTI]

2010 Asia-Pacific International Symposium on Aerospace Technology Rotor-stator interaction-dimensional annular cascade to the impinging harmonic distortions. Each upstream har- monic mode is defined by its and Horan[2] . The #12;· 2 · Igor Vinogradov/ Chinese Journal of Aeronatics typical energy distribution over

Huang, Xun

227

Rotor current transient analysis of DFIG-based wind turbines during symmetrical voltage faults  

Science Journals Connector (OSTI)

Abstract The impact of grid voltage fault on doubly fed induction generators (DFIGs), especially rotor currents, has received much attention. So, in this paper, the rotor currents of based-DFIG wind turbines are considered in a generalized way, which can be widely used to analyze the cases under different levels of voltage symmetrical faults. A direct method based on space vector is proposed to obtain an accurate expression of rotor currents as a function of time for symmetrical voltage faults in the power system. The presented theoretical analysis is simple and easy to understand and especially highlights the accuracy of the expression. Finally, the comparable simulations evaluate this analysis and show that the expression of the rotor currents is sufficient to calculate the maximum fault current, DC and AC components, and especially helps to understand the causes of the problem and as a result, contributes to adapt reasonable approaches to enhance the fault ride through (FRT) capability of DFIG wind turbines during a voltage fault.

Yu Ling; Xu Cai; Ningbo Wang

2013-01-01T23:59:59.000Z

228

Reduction of teeter angle excursions for a two-bladed downwind rotor using cyclic pitch control  

E-Print Network [OSTI]

Reduction of teeter angle excursions for a two-bladed downwind rotor using cyclic pitch control methods are based on cyclic pitch through the pitch servo system. The first method is based on a PI of the pitch regulated 5MW reference turbine used in the IEA Annex 23 benchmark. KEYWORDS: TWO-BLADED WIND

229

Waves of constant shape and the structure of the \\rotors boundary" in excitable media.  

E-Print Network [OSTI]

Waves of constant shape and the structure of the \\rotors boundary" in excitable media. Yu.E. Elkin wave patterns in R 2 , in terms of the kinematic approach. These patterns include rotating waves (diverging and converging spiral waves), and translating waves (retracting waves, \\critical #12;ngers" and \\V

Biktashev, Vadim N.

230

MPC for Wind Power Gradients --Utilizing Forecasts, Rotor Inertia, and Central Energy Storage  

E-Print Network [OSTI]

MPC for Wind Power Gradients -- Utilizing Forecasts, Rotor Inertia, and Central Energy Storage iterations. We demonstrate our method in simulations with various wind scenarios and prices for energy. INTRODUCTION Today, wind power is the most important renewable energy source. For the years to come, many

231

American Institute of Aeronautics and Astronautics Wave Rotor Research Program at Michigan State University  

E-Print Network [OSTI]

and expansion waves to add or remove energy from a fluid flow. It has been proved that for modest pressure.g., number of ports and their positions) vary but a common feature of all wave rotors is an array of channels with straight channels. The drum rotates between two stationary end plates, each of which has a few ports

Müller, Norbert

232

Soft computing based optimum parameter design of PID controller in rotor speed control of wind turbines  

Science Journals Connector (OSTI)

Sensitivity and robustness is the primary issue while designing the controller for large non-linear systems such as offshore wind turbines. The main goal of this study is a novel soft computing based approach in controlling the rotor speed of wind turbine. ... Keywords: bacteria foraging optimization algorithm, optimization, particle swarm optimization, proportional-integral-derivative controller, wind turbines

R. Manikandan; Nilanjan Saha

2011-12-01T23:59:59.000Z

233

Simplifying and speeding the management of intra-node cache coherence  

DOE Patents [OSTI]

A method and apparatus for managing coherence between two processors of a two processor node of a multi-processor computer system. Generally the present invention relates to a software algorithm that simplifies and significantly speeds the management of cache coherence in a message passing parallel computer, and to hardware apparatus that assists this cache coherence algorithm. The software algorithm uses the opening and closing of put/get windows to coordinate the activated required to achieve cache coherence. The hardware apparatus may be an extension to the hardware address decode, that creates, in the physical memory address space of the node, an area of virtual memory that (a) does not actually exist, and (b) is therefore able to respond instantly to read and write requests from the processing elements.

Blumrich, Matthias A. (Ridgefield, CT); Chen, Dong (Croton on Hudson, NY); Coteus, Paul W. (Yorktown Heights, NY); Gara, Alan G. (Mount Kisco, NY); Giampapa, Mark E. (Irvington, NY); Heidelberger, Phillip (Cortlandt Manor, NY); Hoenicke, Dirk (Ossining, NY); Ohmacht, Martin (Yorktown Heights, NY)

2012-04-17T23:59:59.000Z

234

Access to affordable and reliable energy has been a cornerstone of the world's increasing prosperity and economic growth since the beginning of the industrial revolution. Our use of energy in the twenty-first century must also be  

E-Print Network [OSTI]

prosperity and economic growth since the beginning of the industrial revolution. Our use of energy to create the foundation for this new industrial revolution. The talk will also discuss policies public. F E A T U R I N G A New Industrial Revolution for a Sustainable Energy Future SCOB 228 · Friday

235

A Boring Material "Stretched" Could Lead to an Electronics Revolution |  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

At the Crossroads of Chromosomes At the Crossroads of Chromosomes Unveiling the Structure of Adenovirus Making Silicon Melt in Reverse In or Out: Setting a Trap for Radioactive Iodine Probing Spin Liquids with a New Pulsed-Magnet System Science Highlights Archives: 2013 | 2012 | 2011 | 2010 2009 | 2008 | 2007 | 2006 2005 | 2004 | 2003 | 2002 2001 | 2000 | 1998 | Subscribe to APS Science Highlights rss feed A Boring Material "Stretched" Could Lead to an Electronics Revolution SEPTEMBER 30, 2010 Bookmark and Share Predicted effect of biaxial strain on EuTiO3 and the approach to imparting such strain in EuTiO3 films using epitaxy. This schematic shows the in-plane expansion due to biaxial tension. (From Lee et al., Nature 466, 954, 19 August 2010) The oxide compound europium titanate is pretty boring on its own. But

236

Magnetic bearings for automatic control system of electromagnetic suspension of rotors of turbo-group gas-turbine thermal stations  

Science Journals Connector (OSTI)

A brief overview of suspensions is given. The type of suspension for rotors of turbogenerators is chosen. An automatic control system is developed for an electromagnetic suspension of the radial and axial magn...

I. V. Zotov; V. G. Lisienko

2010-03-01T23:59:59.000Z

237

Risk assessment of turbine rotor failure using probabilistic ultrasonic non-destructive evaluations  

SciTech Connect (OSTI)

The study presents a method and application of risk assessment methodology for turbine rotor fatigue failure using probabilistic ultrasonic nondestructive evaluations. A rigorous probabilistic modeling for ultrasonic flaw sizing is developed by incorporating the model-assisted probability of detection, and the probability density function (PDF) of the actual flaw size is derived. Two general scenarios, namely the ultrasonic inspection with an identified flaw indication and the ultrasonic inspection without flaw indication, are considered in the derivation. To perform estimations for fatigue reliability and remaining useful life, uncertainties from ultrasonic flaw sizing and fatigue model parameters are systematically included and quantified. The model parameter PDF is estimated using Bayesian parameter estimation and actual fatigue testing data. The overall method is demonstrated using a realistic application of steam turbine rotor, and the risk analysis under given safety criteria is provided to support maintenance planning.

Guan, Xuefei; Zhang, Jingdan; Zhou, S. Kevin [Siemens Corporation, Corporate Technology, 755 College Rd. E., Princeton NJ 08540 (United States); Rasselkorde, El Mahjoub; Abbasi, Waheed A. [Siemens Energy Inc., 841 Old Frankstown Road, Pittsburgh PA 15239 (United States)

2014-02-18T23:59:59.000Z

238

A new 2D FEM analysis of a disc machine with offset rotor  

SciTech Connect (OSTI)

The paper presents a new 2-Dimensional Finite Element Method (2D FEM) analysis of a double sided axial field, permanent magnet excited brushless DC motor. The rotor of the machine is free to move in a direction perpendicular to the axis of the shaft. Computed 2D results are compared with 3D FEM analysis and the new analysis method is shown to give close agreement.

Gair, S.; Canova, A. [Napier Univ., Edinburgh (United Kingdom). Dept. of Electrical, Electronic and Computer Engineering; Eastham, J.F.; Betzer, T. [Univ. of Bath (United Kingdom). School of Electronic and Electrical Engineering

1995-12-31T23:59:59.000Z

239

Application of SAFER-PC program to determine turbine rotor boresonic inspection intervals  

SciTech Connect (OSTI)

Public Service Company of Colorado (PSCC) used EPRI`s SAFER-PC Program to evaluate their HP/IP, LP, and generator rotors from Cherokee Station Unit 3, to determine appropriate boresonic re-inspection intervals. The program uses fracture mechanics to calculate critical crack sizes, which could lead to catastrophic failure of the rotors. Conservative stress and fracture mechanics analyses showed negligible fatigue crack growth of assumed bore surface cracks would occur over the proposed inspection interval of eighteen years. The evaluation assumed consistent operational start-up procedures for the inspection interval. If the unit experiences more severe operational procedures, the analysis may not be applicable, with smaller critical crack sizes and accelerated crack growth rates expected. The SAFER-PC analysis resulted in an extension of the previously recommended reinspection interval by eight years. By eliminating just this one inspection, PSCC achieved savings in the range of $100,000. Further savings are anticipated by utilizing the SAFER-PC Program to evaluate these and other PSCC rotors in the future.

Sachse, D.G.; Hellner, R.L.; Dupont, E.J. [Public Service Co., Denver, CO (United States)

1996-12-31T23:59:59.000Z

240

Artificial neural network based torque calculation of switched reluctance motor without locking the rotor  

Science Journals Connector (OSTI)

Feedback of motor torque is required in most of switched reluctance (SR) motor applications in order to control torque and its ripple. An SR motor shows highly nonlinear property which does not allow calculating torque analytically. Torque can be directly measured by torque sensor but it inevitably increases the cost and has to be properly mounted on the motor shaft. Instead of torque sensor finite element analysis(FEA) may be employed for torque calculation. However motor modeling and calculation takes relatively long time. The results of FEA may also differ from the actual results. The most convenient way seems to calculate torque from the measured values of rotor position current and flux linkage while locking the rotor at definite positions. However this method needs an extra assembly to lock the rotor. In this study a novel torque calculation based on artificial neural networks (ANNs) is presented. Magnetizing data are collected while a 6/4 SR motor is running. They need to be interpolated for torque calculation. ANN is very strong tool for data interpolation. ANN based torque estimation is verified on the 6/4 SR motor and is compared by FEA based torque estimation to show its validity.

Fuat Kucuk; Hiroki Goto; Hai-Jiao Guo; Osamu Ichinokura

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

A bibliography of the Frank E. Melvin collection of pamphlets of the French Revolution in the University of Kansas Libraries  

E-Print Network [OSTI]

the years in placing most of the standard books necessary for serious scholarship in the revolutionary period. It is right and proper that this collection should bear his name. The pamphlets here listed, provide basic material for the study of the period..., deal with the period of the Directory (1795-1799). The early years of the Consulate, which brought Napoleon to power, are represented only in relatively few miscellaneous pamphlets. The impact of the Revolution on various localities, notably...

Saricks, Ambrose

1960-01-01T23:59:59.000Z

242

Workers of the World, Unite! Franchise Extensions and the Threat of Revolution in Europe, 1820-1938  

E-Print Network [OSTI]

of democratization, such as national income, urbanization, education, war, trade integration, inequality, enlightenment shocks, etc. and for un- observed country speci?c ?xed factors and common time shocks. Yet, it is possible that countries which were ?ready... - tions (voting rights to all adults, secret ballot, civil liberties, e¤ective accountability, etc.). On the contrary, it suggests that the elites would seek to grant the minimum concession needed to ?calm the waters?and avoid a revolution. Accordingly...

Aidt, Toke S.; Jensen, Peter S.

2014-01-01T23:59:59.000Z

243

Research-Technology Management November--December 2013 | 1 Before the Industrial Revolution, goods were produced by  

E-Print Network [OSTI]

to the manufacturing sector as the Industrial Revolution was--the age of 3D printing and the digital tools that support-build-deliver model with the emerging 3D printing model: Ask a factory today to make you a single hammer to your own-scale production with an economies-of-one production model enabled by 3D printing and additive manufactur- ing

244

Independent modal space control and modal filters for active vibration control of rotors  

E-Print Network [OSTI]

, as shown in equation (3. 7): ((t) = At(t) + Z(t) (3. 7) where Z is the modal force vector, and is given by: Z(t) = V BQ(t) = Vr M 'Q(t) (3 g) in which the right hand side of the equation results from the fact that only the lower n rows of the B matrix... gg Alan B. Pal o (Chair of Committee) James S. Noel (Member) Richard . Alexander (Member) Walter L. B ley (Head of Department) August 1992 ABSTRACT Independent Modal Space Control and Modal Filters for Active Vibration Control of Rotors...

Roever, Douglas Michael

2012-06-07T23:59:59.000Z

245

Design of outer-rotor-type multipolar switched reluctance motor for electric vehicle  

Science Journals Connector (OSTI)

In an electric vehicle(EV) with in-wheel motors reducing the weight of the motor is a very important problem in order to improve the driving performance. In this paper we examine the lightweight design of an outer-rotor-type multipolar switched reluctance (SR) motor applied to a prototype EV. We design three SR motors which have different yoke widths and calculate the motor characteristics at a steady rotational speed based on a finite element method. We discuss the optimum relationship between a pole and yoke widths.

Satoshi Fujishiro; Kazumi Ishikawa; Shinki Kikuchi; Kenji Nakamura; Osamu Ichinokura

2006-01-01T23:59:59.000Z

246

An experimental investigation of a tilt rotor aircraft wake in ground effect  

E-Print Network [OSTI]

: Sktlld dS t' 1, "~Et 18, 6 (1975), pp. 51-673. Hunt, J. C. R. , Poulton, E. C. , and Mumford, J. C. , "The Effects of Wldppl:Sd't*l Bd tldt lt*p*' t, "~Bi1di Environment, 11 (1976), pp. 15-28. 50 VITA gichael Louis Frey III was born January 4, 1957...EXPERIMENTAL INVESTIGATION OF A TILT ROTOR AIRCRAFT WAKE IN GROUND EFFECT A Thesis by MICHAEL LOUIS FREY III Submi. tted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER...

Frey, Michael Louis

1982-01-01T23:59:59.000Z

247

Characterizing Inflow Conditions Across the Rotor Disk of a Utility-Scale Wind Turbine (Poster)  

SciTech Connect (OSTI)

Multi-megawatt utility-scale wind turbines operate in a turbulent, thermally-driven atmosphere where wind speed and air temperature vary with height. Turbines convert the wind's momentum into electrical power, and so changes in the atmosphere across the rotor disk influence the power produced by the turbine. To characterize the inflow into utility scale turbines at the National Wind Technology Center (NWTC) near Boulder, Colorado, NREL recently built two 135-meter inflow monitoring towers. This poster introduces the towers and the measurements that are made, showing some of the data obtained in the first few months of operation in 2011.

Clifton, A.; Lundquist, J. K.; Kelley, N.; Scott, G.; Jager, D.; Schreck, S.

2012-01-01T23:59:59.000Z

248

Abstract--This paper proposes a methodology to decide the optimal matching between the size of the rotor of a wind turbine  

E-Print Network [OSTI]

of the rotor of a wind turbine and the rated power of a permanent magnet synchronous machine. This is made of the wind turbine, the gearbox's transformation ratio, the battery voltage and the wind speed probability's rated power and the wind turbine's rotor size. The system studied in this paper consists of 220 (V)/50

Paris-Sud XI, Université de

249

Measured and predicted rotor performance for the SERI advanced wind turbine blades  

SciTech Connect (OSTI)

Measured and predicted rotor performance for the SERI advanced wind turbine blades were compared to assess the accuracy of predictions and to identify the sources of error affecting both predictions and measurements. An awareness of these sources of error contributes to improved prediction and measurement methods that will ultimately benefit future rotor design efforts. Propeller/vane anemometers were found to underestimate the wind speed in turbulent environments such as the San Gorgonio Pass wind farm area. Using sonic or cup anemometers, good agreement was achieved between predicted and measured power output for wind speeds up to 8 m/sec. At higher wind speeds an optimistic predicted power output and the occurrence of peak power at wind speeds lower than measurements resulted from the omission of turbulence and yaw error. In addition, accurate two-dimensional (2-D) airfoil data prior to stall and a post stall airfoil data synthesization method that reflects three-dimensional (3-D) effects were found to be essential for accurate performance prediction. 11 refs.

Tangler, J.; Smith, B.; Kelley, N.; Jager, D.

1992-02-01T23:59:59.000Z

250

Rotor dynamic analysis of GCEP (Gas Centrifuge Enrichment Plant) Tails Withdrawal Test Facility AC-12 compressor  

SciTech Connect (OSTI)

The reliable operation of the centrifugal compressors utilized in the gaseous diffusion process is of great importance due to the critical function of these machines in product and tails withdrawal, cascade purge and evacuation processes, the purge cascade and product booster applications. The same compressors will be used in equally important applications within the Gas Centrifuge Enrichment Plant (GCEP). In response to concern over the excessive vibration exhibited by the AC-12 compressor in the No. 3 position of the GCEP Tails Withdrawal Test Facility, a rotor-bearing dynamic analysis was performed on the compressor. This analysis included the acquisition and reduction of compressor vibration data, characterization and modeling of the rotorbearing system, a computer dynamic study, and recommendations for machine modification. The compressor dynamic analysis was performed for rotor speeds of 9000 rpm and 7200 to 7800 rpm, which includes all possible opreating speeds of the compressor in the GCEP Test Facility. While the analysis was performed on this particular AC-12 compressor, the results should be pertinent to other AC-12 applications as well. Similar diagnostic and analytical techniques can be used to evaluate operation of other types of centrifugal compressors.

Spencer, J.W.

1982-01-22T23:59:59.000Z

251

Mass Transfer Testing of a 12.5-cm Rotor Centrifugal Contactor  

SciTech Connect (OSTI)

TRUEX mass transfer tests were performed using a single stage commercially available 12.5 cm centrifugal contactor and stable cerium (Ce) and europium (Eu). Test conditions included throughputs ranging from 2.5 to 15 Lpm and rotor speeds of 1750 and 2250 rpm. Ce and Eu extraction forward distribution coefficients ranged from 13 to 19. The first and second stage strip back distributions were 0.5 to 1.4 and .002 to .004, respectively, throughout the dynamic test conditions studied. Visual carryover of aqueous entrainment in all organic phase samples was estimated at < 0.1 % and organic carryover into all aqueous phase samples was about ten times less. Mass transfer efficiencies of = 98 % for both Ce and Eu in the extraction section were obtained over the entire range of test conditions. The first strip stage mass transfer efficiencies ranged from 75 to 93% trending higher with increasing throughput. Second stage mass transfer was greater than 99% in all cases. Increasing the rotor speed from 1750 to 2250 rpm had no significant effect on efficiency for all throughputs tested.

D. H. Meikrantz; T. G. Garn; J. D. Law; N. R. Mann; T. A. Todd

2008-09-01T23:59:59.000Z

252

User`s Guide for the NREL Teetering Rotor Analysis Program (STRAP)  

SciTech Connect (OSTI)

The following report gives the reader an overview of instructions on the proper use of the National Renewable Energy Laboratory (formerly the Solar Energy Research Institute, or SERI) teetering Rotor Analysis Program (STRAP version 2.20). STRAP is a derivative of the Force and Loads Analysis program (FLAP). It is intended as a tool for prediction of rotor and blade loads and response for only two-bladed teetering hub wind turbines. The effects of delta-3, undersling, hub mass, and wind turbulence are accounted for. The objectives of the report are to give an overview of the code and also show the methods of data input and correct code execution steps in order to model an example two-bladed teetering hub turbine. A large portion of the discussion (Sections 6.0, 7.0, and 8.0) is devoted to the subject of inputting and running the code for wind turbulence effects. The ability to include turbulent wind effects is perhaps the biggest change in the code since the release of FLAP version 2.01 in 1988. This report is intended to be a user`s guide. It does not contain a theoretical discussion on equations of motion, assumptions, underlying theory, etc. It is intended to be used in conjunction with Wright, Buhl, and Thresher (1988).

Wright, A.D.

1992-08-01T23:59:59.000Z

253

A review of "European Weapons and Armour From the Renaissance to the Industrial Revolution" by Ewart Oakeshott  

E-Print Network [OSTI]

arrangements of subject matter. Ewart Oakeshott. European Weapons and Armour From the Renaissance to the Industrial Revolution. Rochester, NY: #14;e Boydell Press, 2012. Xviii + 288 pp. + c. illus. $28.45. Review by #31;#8;#18;#28;#25;#8; #7;. #19...;#23;#25;#6;#24;#30;, #7;#24;#29;#20;#6;#24;#7;#31;#25;#26; #17;#24;#30;#30;#31;#6;#31;-#25;#24;#17;#11;#27;#22;#30;#30;#31;, #7;#8;. Oakeshott has written an engaging book of great use to scholars and students of the sixteenth and seventeenth centuries. #14;e book...

Furgol, Edward M.

2013-01-01T23:59:59.000Z

254

Estimation of rotor angles of synchronous machines using artificial neural networks and local PMU-based quantities  

Science Journals Connector (OSTI)

This paper investigates a possibility for estimating rotor angles in the time frame of transient (angle) stability of electric power systems, for use in real-time. The proposed dynamic state estimation technique is based on the use of voltage and current ... Keywords: Electric power systems, Multilayer perceptrons, Phasor measurement units, Transient stability monitoring and control

Alberto Del Angel; Pierre Geurts; Damien Ernst; Mevludin Glavic; Louis Wehenkel

2007-10-01T23:59:59.000Z

255

Design of Rotor-side Controller Using Adaptive Time-frequency Method for DFIG Bearing Fault Detection  

Science Journals Connector (OSTI)

To ensure the reliable operation and power quality of wind power systems, the fault-tolerant control for DFIG is studied in this paper. Based on measured motor currents data, an adaptive statistical time-frequency method is then used to detect the fault ... Keywords: Doubly-fed induction generator, monitoring, wind turbine, rotor side inverter

Suratsavadee K. Korkua

2013-07-01T23:59:59.000Z

256

Wind turbine rotor blade with in-plane sweep and devices using the same, and methods for making the same  

DOE Patents [OSTI]

A wind turbine includes a rotor having a hub and at least one blade having a torsionally rigid root, an inboard section, and an outboard section. The inboard section has a forward sweep relative to an elastic axis of the blade and the outboard section has an aft sweep.

Wetzel, Kyle Kristopher

2014-06-24T23:59:59.000Z

257

Virtual dynamic balancing method without trial weights for multi-rotor series shafting based on finite element model analysis  

Science Journals Connector (OSTI)

The traditional influence coefficient dynamic balancing method for multi-rotor series shafting such as turbine-generator sets gas turbines compressor trains and others usually needs to startup many times using trial weights along the rotor. Based on finite element model analysis for the multi-rotor series shafting a virtual dynamic balancing methodology which only needs to collect data of vibration response at operating speed without trial weights is developed in this paper. According to shafting structure and operating parameters the dynamic finite element model was built by using rotor dynamics theory and finite element simulation technology. The shafting dynamic characteristics and weighted influence coefficient matrix can be gotten by exciting virtual unbalance force on the balance place correspondingly. The effectiveness and flexibility of the proposed method have been illustrated by solving a shafting dynamic balancing example with no trial weights requirements. It is believed that the new methods developed in this work will help in reducing the time and cost of the equipment manufacturer or field dynamic balancing procedures.

2014-01-01T23:59:59.000Z

258

Atmospheric Pb deposition since the Industrial Revolution recorded by five Swiss peat profiles: Enrichment factors, fluxes, isotopic composition, and sources  

SciTech Connect (OSTI)

Atmospheric Pb deposition since the Industrial Revolution was studied in western, central, and southern Switzerland using five rural peat bogs. Similar temporal patterns were found in western and central Switzerland, with two distinct periods of Pb enrichment relative to the natural background: between 1880 and 1920 with enrichments ranging from 40 to 80 times, and between 1960 and 1980 with enrichments ranging from 80 to 100 times. The fluxes also were generally elevated in those time periods: in western Switzerland between 1.16 and 1.55 {micro}g cm{sup {minus}2} y{sup {minus}1} during the second period. Between the Industrial Revolution and 1985, nonradiogenic Pb became increasingly important in all five cores because of the replacement of coal by oil after ca. 1920, the use of Australian Pb in industry, and the extensive combustion of leaded gasoline after 1950. The introduction of unleaded gasoline in 1985 had a pronounced effect on the Pb deposition in all five cores. Enrichments dropped sharply, and the isotopic ratios reverted back toward natural values. The cores from western and central Switzerland showed very similar isotopic trends throughout the time period studied, implying that these sites were influenced contemporaneously by similar pollution sources and atmospheric pathways. Southern Switzerland revealed a different record with respect to the Pb pollution: it was dominated by a single massive Pb enrichment dated between 1930 and 1950.

Weiss, D.; Shotyk, W.; Kramers, J.D. [Univ. of Bern (Switzerland)] [Univ. of Bern (Switzerland); Appleby, P.G. [Univ. of Liverpool (United Kingdom). Dept. of Mathematical Sciences] [Univ. of Liverpool (United Kingdom). Dept. of Mathematical Sciences; Cheburkin, A.K. [Ukrainian Academy of Sciences, Kiev (Ukraine). Inst. of Geological Sciences] [Ukrainian Academy of Sciences, Kiev (Ukraine). Inst. of Geological Sciences

1999-05-01T23:59:59.000Z

259

A review of "The Huguenot Soldiers of William of Orange and the Glorious Revolution of 1688: The Lions of Judah." by Matthew Glozier  

E-Print Network [OSTI]

of William of Orange and the Glorious Revolution of 1688: The Lions of Judah. Brighton: Sussex Academic Press, 2002. xi + 228 pp. + 4 illus. $69.95. Review by EDWARD M. FURGOL, NAVY MUSEUM, WASHINGTON NAVY YARD, D.C. As an early modern military historian... of William of Orange and the Glorious Revolution of 1688: The Lions of Judah. Brighton: Sussex Academic Press, 2002. xi + 228 pp. + 4 illus. $69.95. Review by EDWARD M. FURGOL, NAVY MUSEUM, WASHINGTON NAVY YARD, D.C. As an early modern military historian...

Edward M. Furgol

2003-01-01T23:59:59.000Z

260

Sulphur and nitrogen fluxes and budgets in the Bohemian Forest andTatra Mountains during the Industrial Revolution Hydrology and Earth System Sciences, 5(3), 391405 (2001) EGS  

E-Print Network [OSTI]

the Industrial Revolution 391 Hydrology and Earth System Sciences, 5(3), 391­405 (2001) © EGS Sulphur and nitrogen fluxes and budgets in the Bohemian Forest and Tatra Mountains during the Industrial Revolution of the Bohemian Forest (forest lakes) and Tatra Mountains (alpine lakes) over the industrial period. Sulphur

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Hydrodynamic Optimization Method and Design Code for Stall-Regulated Hydrokinetic Turbine Rotors  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

5021 5021 August 2009 Hydrodynamic Optimization Method and Design Code for Stall-Regulated Hydrokinetic Turbine Rotors D. Sale University of Tennessee J. Jonkman and W. Musial National Renewable Energy Laboratory Presented at the ASME 28 th International Conference on Ocean, Offshore, and Arctic Engineering Honolulu, Hawaii May 31-June 5, 2009 NOTICE The submitted manuscript has been offered by an employee of the Alliance for Sustainable Energy, LLC (ASE), a contractor of the US Government under Contract No. DE-AC36-08-GO28308. Accordingly, the US Government and ASE retain a nonexclusive royalty-free license to publish or reproduce the published form of this contribution, or allow others to do so, for US Government purposes. This report was prepared as an account of work sponsored by an agency of the United States government.

262

Indirect rotor position sensing in real time for brushless permanent magnet motor drives  

SciTech Connect (OSTI)

This paper describes a modern solution to real-time rotor position estimation of brushless permanent magnet (PM) motor drives. The position estimation scheme, based on flux linkage and line-current estimation, is implemented in real time by using the abc reference frame, and it is tested dynamically. The position estimation model of the test motor, development of hardware, and basic operation of the digital signal processor (DSP) are discussed. The overall position estimation strategy is accomplished with a fast DSP (TMS320C30). The method is a shaft position sensorless method that is applicable to a wide range of excitation types in brushless PM motors without any restriction on the motor model and the current excitation. Both rectangular and sinewave-excited brushless PM motor drives are examined, and the results are given to demonstrate the effectiveness of the method with dynamic loads in closed estimated position loop.

Ertugrul, N. [Univ. of Adelaide (Australia). Dept. of Electrical and Electronic Engineering] [Univ. of Adelaide (Australia). Dept. of Electrical and Electronic Engineering; Acarnley, P.P. [Univ. of Newcastle upon Tyne (United Kingdom). Dept. of Electrical and Electronic Engineering] [Univ. of Newcastle upon Tyne (United Kingdom). Dept. of Electrical and Electronic Engineering

1998-07-01T23:59:59.000Z

263

New Method to Study Spin Conversion of a Nuclear-Spin Rotor with Low Tunnel Splitting  

Science Journals Connector (OSTI)

A new method is developed to measure the spin-conversion time ?con in low-tunnel-frequency systems. The experiment uses field cycling and consists of three steps: saturation of the tunnel reservoir by Zeeman-tunnel resonance; waiting, away from resonance, during a variable time interval tW; and measurement of the decreased tunnel temperature TT, by use of a saturated Zeeman reservoir. A plot of TT vs tW yields ?con. ?con of CH3 rotors in copper acetate is measured at 15, 12.5, and 6 K and turns out to be extremely long, at least 20T1. This discrepancy is discussed and compared with the one found in lithium acetate.

Greta Vandemaele; Paul Coppens; Lieven Van Gerven

1986-03-17T23:59:59.000Z

264

Chirality in odd-A Rh isotopes within the triaxial particle rotor model  

SciTech Connect (OSTI)

By adopting the fully quantal triaxial particle-rotor model, the candidate chiral doublet bands in odd-A nuclei {sup 103}Rh and {sup 105}Rh with {pi}g{sub 9/2}{sup -1} x {nu}h{sub 11/2}{sup 2} configuration are studied. For the doublet bands in both nuclei, agreement is excellent for the observed energies over the entire spin range and B(M1)/B(E2) at higher spin range. The evolution of the chiral geometry with angular momentum is discussed in detail by using the angular momentum components and their probability distributions. Chirality is found to change from chiral vibration to nearly static chirality at spin I=37/2 and back to another type of chiral vibration at higher spin. The influence of the triaxial deformation {gamma} is also studied.

Qi, B.; Wang, S. Y. [Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Shandong University at Weihai, Weihai 264209 (China); Zhang, S. Q. [State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, 100871 Beijing (China); Meng, J. [State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, 100871 Beijing (China); School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191 (China); Department of Physics, University of Stellenbosch, Matieland 7602 (South Africa); Koike, T. [Department of Physics, Tohoku University, Sendai 980-8578 (Japan)

2011-03-15T23:59:59.000Z

265

The Esso Energy Award Lecture, 1998. Boosting production from low-pressure oil and gas fields: a revolution in hydrocarbon production  

Science Journals Connector (OSTI)

...Boosting production from low-pressure oil and gas fields: a revolution in hydrocarbon...major part of the future source of oil and gas supply. Full development...Caledonia Ltd (Wood Group Engineering), Marathon Oil UK Ltd, Mobil North Sea Ltd, Oil...

1999-01-01T23:59:59.000Z

266

Revolution in Microbial Contamination Control ReliOxTM Corporation has licensed a patented chemical production technology from the University of  

E-Print Network [OSTI]

Revolution in Microbial Contamination Control ReliOxTM Corporation has licensed a patented chemical-fashioned way requires many hazardous chemicals such as concentrated acids and volatile, dangerous gases for generating Chlorine Dioxide with an innovative, compact, and simple- to-operate process platform. Reli

Jawitz, James W.

267

WindPACT Turbine Design Scaling Studies Technical Area 1ÂŒComposite Blades for 80- to 120-Meter Rotor  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1 * NREL/SR-500-29492 1 * NREL/SR-500-29492 Dayton A. Griffin Global Energy Concepts Kirkland, Washington WindPACT Turbine Design Scaling Studies Technical Area 1-Composite Blades for 80- to 120-Meter Rotor March 21, 2000 - March 15, 2001 National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401-3393 NREL is a U.S. Department of Energy Laboratory Operated by Midwest Research Institute * * * * Battelle * * * * Bechtel Contract No. DE-AC36-99-GO10337 April 2001 * NREL/SR-500-29492 WindPACT Turbine Design Scaling Studies Technical Area 1-Composite Blades for 80- to 120-Meter Rotor March 21, 2000 - March 15, 2001 Dayton A. Griffin Global Energy Concepts Kirkland, Washington NREL Technical Monitor: Alan Laxson Prepared under Subcontract No. YAM-0-30203-01 National Renewable Energy Laboratory

268

Rotor reference frame models of a multiloop 2-phase motor drive in brushless DC and microstepping modes  

SciTech Connect (OSTI)

This paper describes non-linear models of a 2-phase permanent magnet synchronous motor drive in brushless DC and microstepping modes. The models account for everything from the main power bus up to and including the mechanical load and velocity feedback loop. In particular, the models include the power electronics for each phase complete with their internal feedback loops. Classical state space averaged power electronics models are transformed to the rotor reference frame along with the usual electromechanical variables. Since SPICE linearizes the rotor reference frame model about shaft velocity, instead of shaft angle, frequency domain methods apply. The frequency domain analysis detects unstable interactions between torque angle and deliberate feedback within the drives. Time domain simulations using stator reference frame models confirm the results. All models are SPICE-compatible but were developed on Cadence`s Analog Workbench.

Chen, J.E. [Lockheed Missiles and Space Co. Inc., Sunnyvale, CA (United States)

1995-12-31T23:59:59.000Z

269

Predictive current control of outer-rotor five-phase BLDC generators applicable for off-shore wind power plants  

Science Journals Connector (OSTI)

Abstract Model predictive control algorithms have recently gained more importance in the field of wind power generators. One of the important categories of model predictive control methods is improved deadbeat control in which the reverse model of generator is used to calculate the appropriate inputs for the next iteration of controlling process. In this paper, a new improved deadbeat algorithm is proposed to control the stator currents of an outer-rotor five-phase BLDC generator. Extended Kalman filter is used in the estimation step of proposed method, and generator equations are used to calculate the appropriate voltages for the next modulation period. Two aspects of proposed controlling method are evaluated including its sensitivity to generator parameter variations and its speed in following the reference values of required torque during transient states. Wind power generators are kept in mind, and proposed controlling method is both simulated and experimentally evaluated on an outer-rotor five-phase BLDC generator.

Jose Luis Romeral Martinez; Ramin Salehi Arashloo; Mehdi Salehifar; Juan Manuel Moreno

2014-01-01T23:59:59.000Z

270

Spinning rotor gauge based vacuum gauge calibration system at the Institute for Plasma Research (IPR)  

Science Journals Connector (OSTI)

The Steady-state Superconducting Tokamak (SST-1) is an indigenously built medium sized fusion device at IPR designed for plasma duration of 1000 seconds. It consists of two large vacuum chambers – Vacuum Vessel (16 m3) and Cryostat (39 m3) which will be pumped to UHV and HV pressures respectively using a set of turbo molecular pumps, Cryo-pumps and Roots pumps. The total as well as the partial pressure measurement in these chambers will be carried out using a set of Pirani gauges, Bayard Alpert type gauges, Capacitance manometers and Residual Gas Analyzers (RGA). A reliable and accurate pressure measurement is essential for successful operation of SST-1 machine. For this purpose a gauge calibration system is set up in SST-1 Vacuum laboratory based on Spinning Rotor Gauge which can measure absolute pressure in the range 1.0 mbar to 1.0 ? 10?7 mbar. This system is designed to calibrate up to five gauges simultaneously for different gases in different operating pressure ranges of the gauges. This paper discusses the experimental set-up and the procedure adopted for the calibration of such vacuum gauges.

Pratibha Semwal; Ziauddin Khan; Kalpesh R Dhanani; Firozkhan S Pathan; Siju George; Dilip C Raval; Prashant L Thankey; Yuvakiran Paravastu; Himabindu M

2012-01-01T23:59:59.000Z

271

Rotor Support Technology Developments for Long Life Closed Brayton Cycle Turbines  

Science Journals Connector (OSTI)

Power conversion systems based upon the Closed Brayton Cycle (CBC) turbine are under consideration for space power generation applications. Using this approach inert gas heated with a nuclear reactor or other means is used to drive a turbine?generator in a recirculating flow path. As a closed system contamination of the working fluid for instance with bearing lubricating oil cannot be tolerated. To prevent this possibility compliant surface gas film bearings are employed that use the working fluid as their lubricant. Foil gas bearings are in widespread use in turbocompressors and microturbines in aeronatuics and terrestrial applications. To successfully implement them for space power CBC systems research is underway at NASA’s Glenn Research Center to assess foil bearing start?up torque requirements bearing thermal management and the effects of high ambient pressures in inert gases on performance. This paper introduces foil gas bearing rotor support technologies and provides an update on bearing performance testing and evaluations being conducted to integrate foil bearings in future CBC turbine systems.

Christopher DellaCorte; Kevin C. Radil; Robert J. Bruckner; Steven W. Bauman; Bernadette J. Puleo; Samuel A. Howard

2006-01-01T23:59:59.000Z

272

Control of a DFIG-based wind energy conversion system operating under harmonically distorted unbalanced grid voltage along with nonsinusoidal rotor injection conditions  

Science Journals Connector (OSTI)

Abstract In this study, novel hybrid proportional-integral-harmonic resonant (PI-R) controllers implemented in the both (dq)+ and rotor (?r?r) reference frames are presented to control a doubly fed induction generator (DFIG)-based wind power generation system operating simultaneously under the three conditions which are nonsinusoidal rotor voltage injection, harmonically distorted grid voltage, and unbalanced grid voltage. The contribution of this work is to present a novel control scheme implemented in the both (dq)+ and rotor (?r?r) reference frames by considering all the three mentioned conditions (no one or two of them). It will be shown that the proposed control scheme keeps the DFIG in an acceptable operation margin and furthermore, it eliminates all harmonics and pulsations components from the stator and the rotor circuits when the DFIG operates under harmonically distorted unbalanced grid voltage along with quasi-sine rotor injection conditions. The proposed control scheme is simulated in MATLAB/Simulink and simulated results are presented to validate the theoretical results. Although this work is carried out under the three mentioned conditions and other related works have been reported under only one condition, comparison between the results of this work and other works is performed to prove the excellent performances of the proposed control scheme.

Hassan Fathabadi

2014-01-01T23:59:59.000Z

273

Transportation of a 451 ton generator stator and a 234 ton generator rotor from Hartsville, TN, to Los Alamos, NM  

SciTech Connect (OSTI)

A 1430 MVA steam turbine generator was acquired from a cancelled nuclear power plant in Tennessee to be used as the pulsed power and energy storage unit for the Confinement Physics Research Facility being built at Los Alamos, NM. The transportation from Hartsville, near Nashville, TN, to Los Alamos, NM, of the two largest single pieces of the generator, a 451 t stator and a 234 t rotor presented a special challenge. Details of the move, by barge from Hartsville to Catoosa, near Tulsa, OK, by rail from Catoosa to Lamy, near Santa Fe, NM, and by road from Lamy to Los Alamos are described. The greatest difficulty of the successful move was the crossing of the Rio Grande river on an existing reinforced concrete bridge. The two-lane wide road transporters for the stator and rotor were fitted with outriggers to provide a four-lane wide vehicle, thus spreading the load over the entire bridge width and meeting acceptable load distribution and bridge safety factors. 2 refs., 6 figs.

Boenig, H.J.; Rogers, J.D.; McLelland, G.R.; Pelts, C.T. (Los Alamos National Lab., NM (USA); McLelland Engineering, Dallas, TX (USA); Reliance Crane and Rigging, Inc., Phoenix, AZ (USA))

1989-01-01T23:59:59.000Z

274

Estimation of rotor angles of synchronous machines using artificial neural networks and local PMU-based quantities  

Science Journals Connector (OSTI)

This paper investigates a possibility for estimating rotor angles in the time frame of transient (angle) stability of electric power systems, for use in real-time. The proposed dynamic state estimation technique is based on the use of voltage and current phasors obtained from a phasor measurement unit supposed to be installed on the extra-high voltage side of the substation of a power plant, together with a multilayer perceptron trained off-line from simulations. We demonstrate that an intuitive approach to directly map phasor measurement inputs to the neural network to generator rotor angle does not offer satisfactory results. We found out that a good way to approach the angle estimation problem is to use two neural networks in order to estimate the sin ( ? ) and cos ( ? ) of the angle and recover the latter from these values by simple post-processing. Simulation results on a part of the Mexican interconnected system show that the approach could yield satisfactory accuracy for real-time monitoring and control of transient instability.

Alberto Del Angel; Pierre Geurts; Damien Ernst; Mevludin Glavic; Louis Wehenkel

2007-01-01T23:59:59.000Z

275

Analyse numrique qualitative d'interactions rotor/stator dans un compresseur haute pression d'un moteur d'hlicoptre  

E-Print Network [OSTI]

are carried out on the centrifugal compressor of a modern heli- copter engine, for which it is assumed méthodologie systématique d'analyse. Les simulations d'interaction sont réalisées sur un compresseur centrifuge-harmoniques du chargement imposé. A qualitative numerical analysis of rotor-casing interactions in centrifugal

Paris-Sud XI, Université de

276

Preliminary Structural Design Conceptualization for Composite Rotor for Verdant Power Water Current: Cooperative Research and Development Final Report, CRADA Number CRD-08-296  

SciTech Connect (OSTI)

The primary thrust of the CRADA will be to develop a new rotor design that will allow higher current flows (>4m/s), greater swept area (6-11m), and in the process, will maximize performance and energy capture.

Hughes, S.

2011-02-01T23:59:59.000Z

277

Real-time Stereo Visual Servoing Control of an UAV having Eight-Rotors Sergio Salazar, Hugo Romero, Jose Gomez and Rogelio Lozano  

E-Print Network [OSTI]

Real-time Stereo Visual Servoing Control of an UAV having Eight-Rotors Sergio Salazar, Hugo Romero UAV using image-based visual servoing with stereo vision. In order to control the orientation vision system we are able to estimate the UAV 3D position, while from the inertial sensors we can obtain

Paris-Sud XI, Université de

278

3038 IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 55, NO. 8, AUGUST 2008 Control of High-Speed Solid-Rotor Synchronous  

E-Print Network [OSTI]

Stator resistance. I. INTRODUCTION UNINTERRUPTIBLE power supply (UPS) systems have been widely utilized]­[5]. High-power flywheels can provide backup power to handle the majority of power disruptions that last-Speed Solid-Rotor Synchronous Reluctance Motor/Generator for Flywheel-Based Uninterruptible Power Supplies Jae

Hofmann, Heath F.

279

Natural gas from shale formation – The evolution, evidences and challenges of shale gas revolution in United States  

Science Journals Connector (OSTI)

Abstract Extraction of natural gas from shale rock in the United States (US) is one of the landmark events in the 21st century. The combination of horizontal drilling and hydraulic fracturing can extract huge quantities of natural gas from impermeable shale formations, which were previously thought to be either impossible or uneconomic to produce. This review offers a comprehensive insight into US shale gas opportunities, appraising the evolution, evidence and the challenges of shale gas production in the US. The history of US shale gas in this article is divided into three periods and based on the change of oil price (i.e., the period before the 1970s oil crisis, the period from 1970s to 2000, and the period since 2000), the US has moved from being one of the world's biggest importers of gas to being self-sufficient in less than a decade, with the shale gas production increasing 12-fold (from 2000 to 2010). The US domestic natural gas price hit a 10-year low in 2012. The US domestic natural gas price in the first half of 2012 was about $2 per million British Thermal Unit (BTU), compared with Brent crude, the world benchmark price for oil, now about $ 80–100/barrel, or $14–17 per million BTU. Partly due to an increase in gas-fired power generation in response to low gas prices, US carbon emissions from fossil-fuel combustion fell by 430 million ton CO2 – more than any other country – between 2006 and 2011. Shale gas also stimulated economic growth, creating 600,000 new jobs in the US by 2010. However, the US shale gas revolution would be curbed, if the environmental risks posed by hydraulic fracturing are not managed effectively. The hydraulic fracturing is water intensive, and can cause pollution in the marine environment, with implications for long-term environmental sustainability in several ways. Also, large amounts of methane, a powerful greenhouse gas, can be emitted during the shale gas exploration and production. Hydraulic fracturing also may induce earthquakes. These environmental risks need to be managed by good practices which is not being applied by all the producers in all the locations. Enforcing stronger regulations are necessary to minimize risk to the environment and on human health. Robust regulatory oversight can however increase the cost of extraction, but stringent regulations can foster an historic opportunity to provide cheaper and cleaner gas to meet the consumer demand, as well as to usher in the future growth of the industry.

Qiang Wang; Xi Chen; Awadhesh N. Jha; Howard Rogers

2014-01-01T23:59:59.000Z

280

Revolution Coffees Classic Coffees  

E-Print Network [OSTI]

high in antioxidants Fruit And Herbal Infusions Small Regular Large Chai Tea £1.65 £1.85 £2.20 A spiced.85 Big Leaf Peppermint Served by the pot £1.85 Selection of herbal and fruit infusions Served by the cup

Oakley, Jeremy

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

The refrigerator revolution  

SciTech Connect (OSTI)

This article discusses how a simple, new technology threw the best-laid plans of the chemical and refrigerator industries into disarray-and provided a new perspective on how future environmental agreements can be reached. In recent years, a series of massive business mergers has mesmerized the industrial world. However in the early 1990s a German environmentalist, triggered global reprocussions in the wake of the mandate to phase out the use of ozone depleting substances. The economic and political background of this is explained in detail.

Ayres, E.; French, H.

1996-09-01T23:59:59.000Z

282

Launching a Technology Revolution  

SciTech Connect (OSTI)

This paper describes the technological challenges and opportunities that spring from the goal of stabilizing the concentration of greenhouse gases particularly as they affect energy systems.

Edmonds, James A.; Stokes, Gerald M.

2003-02-02T23:59:59.000Z

283

WindPACT Turbine Design Scaling Studies Technical Area 2: Turbine, Rotor, and Blade Logistics; March 27, 2000 to December 31, 2000  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

1 * NREL/SR-500-29439 1 * NREL/SR-500-29439 Kevin Smith Global Energy Concepts LLC Kirkland, Washington WindPACT Turbine Design Scaling Studies Technical Area 2: Turbine, Rotor, and Blade Logistics March 27, 2000 to December 31, 2000 National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401-3393 NREL is a U.S. Department of Energy Laboratory Operated by Midwest Research Institute * * * * Battelle * * * * Bechtel Contract No. DE-AC36-99-GO10337 June 2001 * NREL/SR-500-29439 WindPACT Turbine Design Scaling Studies Technical Area 2: Turbine, Rotor, and Blade Logistics March 27, 2000 to December 31, 2000 Kevin Smith Global Energy Concepts LLC Kirkland, Washington NREL Technical Monitor: Alan Laxson Prepared under Subcontract No. YAM-0-30203-01 National Renewable Energy Laboratory

284

Synchronous motor with soft start element formed between the motor rotor and motor output shaft to successfully synchronize loads that have high inertia and/or high torque  

DOE Patents [OSTI]

A line-start synchronous motor has a housing, a rotor shaft, and an output shaft. A soft-start coupling portion is operatively coupled to the output shaft and the rotor shaft. The soft-start coupling portion is configurable to enable the synchronous motor to obtain synchronous operation and to drive, at least near synchronous speed during normal steady state operation of the motor, a load having characteristics sufficient to prevent obtaining normal synchronous operation of the motor when the motor is operatively connected to the load in the absence of the soft-start coupling. The synchronous motor is sufficiently rated to obtain synchronous operation and to drive, at least near synchronous speed during normal steady state operation of the motor, a load having characteristics sufficient to prevent obtaining normal synchronous operation of the motor when the motor is operatively connected to the load in the absence of the soft-start coupling.

Umans, Stephen D; Nisley, Donald L; Melfi, Michael J

2014-10-28T23:59:59.000Z

285

Development and Field-Scale Optimization of a Honeycomb Zeolite Rotor Concentrator/Recuperative Oxidizer for the Abatement of Volatile Organic Carbons from Semiconductor Industry  

Science Journals Connector (OSTI)

Also the developed rotor performance’s was evaluated in the field; (2) Direct Fired Thermal Oxidizer (DFTO), Recuperative Oxidizer (RO), Regenerative Thermal Oxidizer (RTO) and Regenerative Catalytic oxidizer (RCO) are the available incinerators and the RO was selected as the oxidizer in this work; (3) The overall performance of the developed rotor/oxidizer was explored in a field scale under varying conditions; (4) The energy saving strategy was fulfilled by reducing heat loss from the oxidizer and recovering heat from the exhaust gas. ... The available types of oxidizers include Direct Fired Thermal Oxidizer (DFTO), Recuperative Oxidizer (RO), Regenerative Thermal Oxidizer (RTO) and Regenerative Catalytic oxidizer (RCO). ... cost models were derived for recuperative thermal (TO) and regenerative thermal oxidizers (RTO). ...

Ji Yang; Yufeng Chen; Limei Cao; Yuling Guo; Jinping Jia

2011-11-17T23:59:59.000Z

286

Reliability of steam-turbine rotors. Task 1. Lifetime prediction analysis system. Final report. [Using STRAP and SAFER computer codes and boresonic data  

SciTech Connect (OSTI)

Task 1 of RP 502, Reliability of Steam Turbine Rotors, resulted in the development of a computerized lifetime prediction analysis system (STRAP) for the automatic evaluation of rotor integrity based upon the results of a boresonic examination of near-bore defects. Concurrently an advanced boresonic examination system (TREES), designed to acquire data automatically for lifetime analysis, was developed and delivered to the maintenance shop of a major utility. This system and a semi-automated, state-of-the-art system (BUCS) were evaluated on two retired rotors as part of the Task 2 effort. A modified nonproprietary version of STRAP, called SAFER, is now available for rotor lifetime prediction analysis. STRAP and SAFER share a common fracture analysis postprocessor for rapid evaluation of either conventional boresonic amplitude data or TREES cell data. The final version of this postprocessor contains general stress intensity correlations for elliptical cracks in a radial stress gradient and provision for elastic-plastic instability of the ligament between an imbedded crack and the bore surface. Both linear elastic and ligament rupture models were developed for rapid analysis of linkup within three-dimensional clusters of defects. Bore stress-rupture criteria are included, but a creep-fatigue crack growth data base is not available. Physical and mechanical properties of air-melt 1CrMoV forgings are built into the program; however, only bounding values of fracture toughness versus temperature are available. Owing to the lack of data regarding the probability of flaw detection for the boresonic systems and of quantitative verification of the flaw linkup analysis, automatic evlauation of boresonic results is not recommended, and the lifetime prediction system is currently restricted to conservative, deterministic analysis of specified flaw geometries.

Nair, P.K.; Pennick, H.G.; Peters, J.E.; Wells, C.H.

1982-12-01T23:59:59.000Z

287

Manufacturing and properties of newly developed 9%CrMoVNiNbN high-pressure low-pressure rotor shaft forging  

SciTech Connect (OSTI)

In order to obtain the improved strength and toughness for high-pressure low-pressure rotor shaft forging, fundamental studies using laboratory heats were performed on the 9CrMoV base materials, and effects of chemistry on toughness and creep rupture strength were investigated. From the investigation, it is showed that the superclean 9CrMoVNiNbN steel with reduced Si and Mn contents and Ni addition provides a superior strength versus toughness balance. Based on these fundamental studies, a trial high-pressure low-pressure rotor shaft forging with diameter of low-pressure section of 1,750 mm and diameter of high-pressure section of 1,200 mm was successfully manufactured from the diameter of 1,800 mm, and the weight of 65 ton ESR ingot. From the evaluation test results of this trial rotor forging, homogeneous distribution of chemistry was confirmed and low impurity contents was observed in the whole forging. The superior strength and toughness were confirmed with good creep rupture strength. The FATT at the center of low-pressure section was {minus}3 C with the tensile strength level of 870 MPa. From the results of fracture toughness test, low cycle fatigue test, and isothermal aging test, superior mechanical properties were demonstrated. Thus, the superclean 9CrMoVNiNbN steel with reduced Si and Mn contents and Ni addition, is particularly suitable for the high-pressure low-pressure rotor material for advanced combined cycle power plants.

Azuma, Tsukasa; Tanaka, Yasuhiko; Ishiguro, Tohru; Yoshida, Hajime; Ikeda, Yasumi [Japan Steel Works, Muroran (Japan)

1997-12-31T23:59:59.000Z

288

Experimental investigation of pressure loss and heat transfer in a rotor–stator cavity with two outlets  

Science Journals Connector (OSTI)

Abstract This article presented detailed measurements of the pressure distribution and heat transfer in a rotor–stator cavity with inlet of orifices on the rotating disk and two outlets at both low radius and high radius. Transient thermochromic liquid crystal (TLC) technique was employed to determine the convective heat transfer characteristics on the test surface of the rotating disk. Rotational Reynolds numbers (Re?) ranging from 4.9 × 105 to 2.47 × 106 and dimensionless flow rate (Cw) between 6.9 × 103 and 2.72 × 104 were considered. Experimental results indicated that the characteristics of the pressure loss coefficient between the inlet and the outlet was strongly dependent on the Re? and Cw. Under the current operating conditions, the heat transfer on the surface of the rotating disk was weakened at both in the upper and lower edges for the case of r/R = 0.775 due to the existence of the recirculation. Whereas the heat transfer were enhanced near the upper radius with relatively low flow rate and high rotational speed, as well as on the middle radius with relatively high flow rate and low rotational speed.

X. Luo; G. Han; H. Wu; L. Wang; G. Xu

2014-01-01T23:59:59.000Z

289

Modeling Creep-Fatigue-Environment Interactions in Steam Turbine Rotor Materials for Advanced Ultra-supercritical Coal Power Plants  

SciTech Connect (OSTI)

The goal of this project is to model creep-fatigue-environment interactions in steam turbine rotor materials for advanced ultra-supercritical (A-USC) coal power Alloy 282 plants, to develop and demonstrate computational algorithms for alloy property predictions, and to determine and model key mechanisms that contribute to the damages caused by creep-fatigue-environment interactions. The nickel based Alloy 282 is selected for this project because it is one of the leading candidate materials for the high temperature/pressure section of an A-USC steam turbine. The methods developed in the project are expected to be applicable to other metal alloys in similar steam/oxidation environments. The major developments are: ? failure mechanism and microstructural characterization ? atomistic and first principles modeling of crack tip oxygen embrittlement ? modeling of gamma prime microstructures and mesoscale microstructure-defect interactions ? microstructure and damage-based creep prediction ? multi-scale crack growth modeling considering oxidation, viscoplasticity and fatigue The technology developed in this project is expected to enable more accurate prediction of long service life of advanced alloys for A-USC power plants, and provide faster and more effective materials design, development, and implementation than current state-of-the-art computational and experimental methods. This document is a final technical report for the project, covering efforts conducted from January 2011 to January 2014.

Shen, Chen

2014-01-20T23:59:59.000Z

290

Sensitivity of transitions in internal rotor molecules to a possible variation of the proton-to-electron mass ratio  

SciTech Connect (OSTI)

Recently, methanol was identified as a sensitive target system to probe variations of the proton-to-electron mass ratio {mu}[Jansen et al., Phys. Rev. Lett. 106, 100801 (2011)]. The high sensitivity of methanol originates from the interplay between overall rotation and hindered internal rotation of the molecule; that is, transitions that convert internal rotation energy into overall rotation energy, or vice versa, have an enhanced sensitivity coefficient, K{sub {mu}}. As internal rotation is a common phenomenon in polyatomic molecules, it is likely that other molecules display similar or even larger effects. In this paper we generalize the concepts that form the foundation of the high sensitivity in methanol and use this to construct an approximate model which makes it possible to estimate the sensitivities of transitions in internal rotor molecules with C{sub 3v} symmetry, without performing a full calculation of energy levels. We find that a reliable estimate of transition sensitivities can be obtained from the three rotational constants (A, B, and C) and three torsional constants (F, V{sub 3}, and {rho}). This model is verified by comparing obtained sensitivities for methanol, acetaldehyde, acetamide, methyl formate, and acetic acid with a full analysis of the molecular Hamiltonian. Of the molecules considered, methanol is by far the most suitable candidate for laboratory and cosmological tests searching for a possible variation of {mu}.

Jansen, Paul; Ubachs, Wim; Bethlem, Hendrick L. [Institute for Lasers, Life and Biophotonics, VU University Amsterdam, De Boelelaan 1081, NL-1081 HV Amsterdam (Netherlands); Kleiner, Isabelle [Laboratoire Interuniversitaire des Systemes Atmospheriques (LISA), CNRS UMR 7583 et Universites Paris 7 et Paris Est, 61 avenue du General de Gaulle, FR-94010 Creteil Cedex (France); Xu, Li-Hong [Department of Physics and Centre for Laser, Atomic, and Molecular Sciences, University of New Brunswick, Saint John, New Brunswick, Canada E2L 4L5 (Canada)

2011-12-15T23:59:59.000Z

291

Bayesian computation: a statistical revolution  

Science Journals Connector (OSTI)

...part, to the domination One contribution...x, i.e. to set l( | x1...Therefore, locating the mode of the...the chances of locating the correct peak...param- eter (or set of parameters...ages 2 and 3 and set it constant for...the problem of locating Phil. Trans...

2003-01-01T23:59:59.000Z

292

SCIENCE IN THE FRENCH REVOLUTION  

Science Journals Connector (OSTI)

...chorus by 1793: Intellect is the enemy of liberty; erudition is unsuited to a Republic...followed by purge. Direction of the metric project, for example, was assumed by a provisional...by his research assistants-"O Happy Liberty." Throughout, the spokesmen for science...

Charles Coulston Gillispie

1959-01-01T23:59:59.000Z

293

THE NUCLEAR ENERGY REVOLUTION—1966  

Science Journals Connector (OSTI)

...power. The estimated water cost at the plant site...assessed against municipal water projects. A more recent...using an organic- cooled heavy-water reactor as the energy source and a slightly more advanced evaporator with a performance...

Alvin M. Weinberg; Gale Young

1967-01-01T23:59:59.000Z

294

Revolution in European nuclear law  

Science Journals Connector (OSTI)

Until now, there has been no European Community Law about nuclear safety. According to decisions of the European Court of Justice (ECJ), the community has the right to regulate this field, but the former policy neglected this. Now, a draft has been published that seems to revolutionise the standards of nuclear safety in Europe.

Wolf-Georg Scharf

2009-01-01T23:59:59.000Z

295

THE NUCLEAR ENERGY REVOLUTION—1966  

Science Journals Connector (OSTI)

...Edison Niagara Mohawk Connecticut Yankee Commonwealth Edison Boston Edison...E Northern States Power Co. TVA Vermont Yankee Duke Power Company Philadelphia...experience with such power plants as the Yankee pressurized-water reactor (175...

Alvin M. Weinberg; Gale Young

1967-01-01T23:59:59.000Z

296

Revolution Now | Department of Energy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

investments, the clean energy future has already arrived for four key technologies: wind turbines, solar panels, electric vehicles and LED light bulbs, each of which has seen drops...

297

Nepal's Election: A Peaceful Revolution?  

E-Print Network [OSTI]

................................................................................................................2 B. THE STUTTERING CHALLENGE.....................................................................................................3 C. THE MADHESIS PARTIES: MOTIVATION AMID MUTUAL SUSPICION .............................................4 D... national election with the mix of strategic firmness and tactical flexibility with which they had pursued the armed conflict. Above all, they demonstrated their ability to learn and adapt. B. THE STUTTERING CHALLENGE For their opponents, the picture...

International Crisis Group

2008-07-03T23:59:59.000Z

298

Revolutions in the earth sciences  

Science Journals Connector (OSTI)

...spawning formation of other solar systems. A uni ed scenario...Milankovic cycles, due to changes in solar insulation, linked with changes...one second to the age of the solar system. Various time-scales...the giant Chicxulub crater in Mexico, 65 Myr ago. Extinction of...

1999-01-01T23:59:59.000Z

299

THE NUCLEAR ENERGY REVOLUTION—1966  

Science Journals Connector (OSTI)

...of the coming generation. It is this...cheap nuclear power, about which...water nuclear power plant. At its...for a coal-fired power plant of the...Utilities Rochester Gas & Electric Consolidated...available for generation 76 per cent of...

Alvin M. Weinberg; Gale Young

1967-01-01T23:59:59.000Z

300

The GIS Revolution in Transportation  

E-Print Network [OSTI]

Analysis (http://cta.ornl.gov/cta/) at Oak Ridge National Laboratory. This is a group of 34 researchers and support contractors that focus on freight, energy, safety, supply chain, defense, and security studies and systems development for air, rail, water...

Harrison, Glen

2006-11-15T23:59:59.000Z

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Riddell Revolution Speed Adult Large  

E-Print Network [OSTI]

Available: Adult Football Helmet Detailed Ratings May 2012 Riddell 360 Sample 1 2 3 Size Adult Large Adult.237 0.239 Overall STAR 0.239 Best Available: A total of 15 adult football helmet models that have been values. Helmet Ratings #12;Adult Football Helmet Detailed Ratings May 2012 Schutt ION 4D Sample 1 2 3

Lu, Chang

302

THE NUCLEAR ENERGY REVOLUTION—1966  

Science Journals Connector (OSTI)

...plant. Most of the development in evaporator design...currently accessible technology. But the next factor...and research and development must precede any...supposes that the turbine power generated...recasting this advanced technology into the design...reforming of natural gas. Table 5 gives...

Alvin M. Weinberg; Gale Young

1967-01-01T23:59:59.000Z

303

Final report on grand challenge LDRD project : a revolution in lighting : building the science and technology base for ultra-efficient solid-state lighting.  

SciTech Connect (OSTI)

This SAND report is the final report on Sandia's Grand Challenge LDRD Project 27328, 'A Revolution in Lighting -- Building the Science and Technology Base for Ultra-Efficient Solid-state Lighting.' This project, which for brevity we refer to as the SSL GCLDRD, is considered one of Sandia's most successful GCLDRDs. As a result, this report reviews not only technical highlights, but also the genesis of the idea for Solid-state Lighting (SSL), the initiation of the SSL GCLDRD, and the goals, scope, success metrics, and evolution of the SSL GCLDRD over the course of its life. One way in which the SSL GCLDRD was different from other GCLDRDs was that it coincided with a larger effort by the SSL community - primarily industrial companies investing in SSL, but also universities, trade organizations, and other Department of Energy (DOE) national laboratories - to support a national initiative in SSL R&D. Sandia was a major player in publicizing the tremendous energy savings potential of SSL, and in helping to develop, unify and support community consensus for such an initiative. Hence, our activities in this area, discussed in Chapter 6, were substantial: white papers; SSL technology workshops and roadmaps; support for the Optoelectronics Industry Development Association (OIDA), DOE and Senator Bingaman's office; extensive public relations and media activities; and a worldwide SSL community website. Many science and technology advances and breakthroughs were also enabled under this GCLDRD, resulting in: 55 publications; 124 presentations; 10 book chapters and reports; 5 U.S. patent applications including 1 already issued; and 14 patent disclosures not yet applied for. Twenty-six invited talks were given, at prestigious venues such as the American Physical Society Meeting, the Materials Research Society Meeting, the AVS International Symposium, and the Electrochemical Society Meeting. This report contains a summary of these science and technology advances and breakthroughs, with Chapters 1-5 devoted to the five technical task areas: 1 Fundamental Materials Physics; 2 111-Nitride Growth Chemistry and Substrate Physics; 3 111-Nitride MOCVD Reactor Design and In-Situ Monitoring; 4 Advanced Light-Emitting Devices; and 5 Phosphors and Encapsulants. Chapter 7 (Appendix A) contains a listing of publications, presentations, and patents. Finally, the SSL GCLDRD resulted in numerous actual and pending follow-on programs for Sandia, including multiple grants from DOE and the Defense Advanced Research Projects Agency (DARPA), and Cooperative Research and Development Agreements (CRADAs) with SSL companies. Many of these follow-on programs arose out of contacts developed through our External Advisory Committee (EAC). In h s and other ways, the EAC played a very important role. Chapter 8 (Appendix B) contains the full (unedited) text of the EAC reviews that were held periodically during the course of the project.

Copeland, Robert Guild; Mitchell, Christine Charlotte; Follstaedt, David Martin; Lee, Stephen Roger; Shul, Randy John; Fischer, Arthur Joseph; Chow, Weng Wah Dr.; Myers, Samuel Maxwell, Jr.; Thoma, Steven George; Gee, James Martin; Coltrin, Michael Elliott; Burdick, Brent A.; Salamone, Angelo, L., Jr.; Hadley, G. Ronald; Elliott, Russell D.; Campbell, Jonathan M.; Abrams, Billie Lynn; Wendt, Joel Robert; Pawlowski, Roger Patrick; Simpson, Regina Lynn; Kurtz, Steven Ross; Cole, Phillip James; Fullmer, Kristine Wanta; Seager, Carleton Hoover; Bogart, Katherine Huderle Andersen; Biefeld, Robert Malcolm; Kerley, Thomas M.; Norman, Adam K.; Tallant, David Robert; Woessner, Stephen Matthew; Figiel, Jeffrey James; Moffat, Harry K.; Provencio, Paula Polyak; Emerson, John Allen; Kaplar, Robert James; Wilcoxon, Jess Patrick; Waldrip, Karen Elizabeth; Rohwer, Lauren Elizabeth Shea; Cross, Karen Charlene; Wright, Alan Francis; Gonzales, Rene Marie; Salinger, Andrew Gerhard; Crawford, Mary Hagerott; Garcia, Marie L.; Allen, Mark S.; Southwell, Edwin T. (Perspectives, Sedona, AZ); Bauer, Tom M.; Monson, Mary Ann; Tsao, Jeffrey Yeenien; Creighton, James Randall; Allerman, Andrew Alan; Simmons, Jerry A.; Boyack, Kevin W.; Jones, Eric Daniel; Moran, Michael P.; Pinzon, Marcia J. (Perspectives, Sedona, AZ); Pinson, Ariane O. (Perspectives, Sedona, AZ); Miksovic, Ann E. (Perspectives, Sedona, AZ); Wang, George T.; Ashby, Carol Iris Hill; Missert, Nancy A.; Koleske, Daniel David; Rahal, Nabeel M.

2004-06-01T23:59:59.000Z

304

The new ductile fracture criterion for 30Cr2Ni4MoV ultra-super-critical rotor steel at elevated temperatures  

Science Journals Connector (OSTI)

Abstract In this paper a new ductile fracture criterion was derived by taking into account the plastic deformation capacity of material and stress states, which can be used to describe fracture behavior and critical rupture conditions of 30Cr2Ni4MoV ultra-super-critical rotor steel during hot forging process. In order to establish this criterion, the tensile tests at different temperatures and strain rates were firstly conducted on Gleeble-1500 thermo-mechanical simulator, and then a measurement and conversion method was applied to estimate the equivalent fracture strain ? ¯ f that represents the deformation capacity of material in ductile fracture process. Experimental results indicated that ? ¯ f greatly depends on the temperature and strain rate. A model of ? ¯ f as a function of the temperature and strain rate was also established. To validate the proposed fracture criterion, additionally, the simulation of tensile test and the fractographic observation of the tensile specimen were conducted. The upsetting tests that possess different stress states and the corresponding numerical simulations were also performed. These results show that the developed criterion can accurately predict the cracks initiation and the location of the cracks at elevated temperatures.

Jianli He; Zhenshan Cui; Fei Chen; Yanhong Xiao; Liqun Ruan

2013-01-01T23:59:59.000Z

305

Structural health and prognostics management for offshore wind turbines : case studies of rotor fault and blade damage with initial O&M cost modeling.  

SciTech Connect (OSTI)

Operations and maintenance costs for offshore wind plants are significantly higher than the current costs for land-based (onshore) wind plants. One way to reduce these costs would be to implement a structural health and prognostic management (SHPM) system as part of a condition based maintenance paradigm with smart load management and utilize a state-based cost model to assess the economics associated with use of the SHPM system. To facilitate the development of such a system a multi-scale modeling approach developed in prior work is used to identify how the underlying physics of the system are affected by the presence of damage and faults, and how these changes manifest themselves in the operational response of a full turbine. This methodology was used to investigate two case studies: (1) the effects of rotor imbalance due to pitch error (aerodynamic imbalance) and mass imbalance and (2) disbond of the shear web; both on a 5-MW offshore wind turbine in the present report. Based on simulations of damage in the turbine model, the operational measurements that demonstrated the highest sensitivity to the damage/faults were the blade tip accelerations and local pitching moments for both imbalance and shear web disbond. The initial cost model provided a great deal of insight into the estimated savings in operations and maintenance costs due to the implementation of an effective SHPM system. The integration of the health monitoring information and O&M cost versus damage/fault severity information provides the initial steps to identify processes to reduce operations and maintenance costs for an offshore wind farm while increasing turbine availability, revenue, and overall profit.

Myrent, Noah J. [Purdue Center for Systems Integrity, Lafayette, IN; Kusnick, Joshua F. [Purdue Center for Systems Integrity, Lafayette, IN; Barrett, Natalie C. [Purdue Center for Systems Integrity, Lafayette, IN; Adams, Douglas E. [Purdue Center for Systems Integrity, Lafayette, IN; Griffith, Daniel Todd

2013-04-01T23:59:59.000Z

306

Nomenclature R mean rotor radius  

E-Print Network [OSTI]

; Hysteresis loops 1. Introduction Axial #ow compressors are subject to two distinct aerodynamic instabilities). Automatica 37 (2001) 921}931 Brief Paper Rotating stall control for axial #ow compressors Calin Belta, rotating stall and surge, which can severely limit the compressor performance. Both these instabilities

Belta, Calin A.

307

Sandia National Laboratories: Rotor Innovation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Engine Test Facility Central Receiver Test Facility Power Towers for Utilities Solar Furnace Dish Test Facility Optics Lab Parabolic Dishes Work For Others (WFO) User...

308

Solar Photovoltaics Technology: The Revolution Begins  

Science Journals Connector (OSTI)

The prospects of solar-photovoltaic (PV) technologies are envisioned, arguing this electricity source is at a tipping point in the complex, worldwide energy outlook. The emphasis of...

Kazmerski, Lawrence L

309

Nutational damping times in solids of revolution  

Science Journals Connector (OSTI)

......solar-system bodies (asteroids and comets) has improved dramatically over...despite a small sample - several comets, most notably Halley, exhibit...benefits may be substantial now as landings on comets (Rosetta) and asteroids (Muses......

Ishan Sharma; Joseph A. Burns; C.-Y. Hui

2005-05-01T23:59:59.000Z

310

CHP -- A revolution in the making  

SciTech Connect (OSTI)

Liberalization, globalization, and particularly climate change are changing energy thinking. In the future, climate change will be tackled by improved energy efficiency and carbon neutral sources of energy, but much more could be done today by the more widespread use of CHP. CHP has made reasonably good progress in the UK and Europe, due to energy industry liberalization and the widespread availability of gas. But the pursuit of sustainability objectives requires government intervention into liberalized markets. While the current UK Government is a strong supporter of CHP, major opportunities to develop CHP were missed in favor of less efficient CCGT power stations over the last decade. The two critical policy issues in the UK now are the proposed tax on the business use of energy and the current reform of electricity trading arrangements. Both could impact favorably on the development of CHP. The UK CHP Association, COGEN Europe and the International Cogeneration Alliance continue to press the case for CHP.

Green, D.

1999-07-01T23:59:59.000Z

311

Quantum technology: the second quantum revolution  

Science Journals Connector (OSTI)

...be an electron or nuclear spin in a molecule...the Coulomb energy cost of adding one extra...1667 A B A' B' C D BS M M S - 0 2.0 1...resolution at low cost. In addition to writing...A silicon-based nuclear spin quantum computer...

2003-01-01T23:59:59.000Z

312

The Clean Tech Revolution: Why It's Real  

E-Print Network [OSTI]

(GW) 0 1 2 3 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Total Installed Solar Capacity(GW) 0 Irvine, California The problem is huge #12;4/1/2011 2 The problem is getting worse * Harvard Public 10 20 30 40 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 Total Installed Wind Capacity

Loudon, Catherine

313

Capturing Sunlight: A Revolution in Collector Design  

Science Journals Connector (OSTI)

...heat swim-ming pools-reflecting in...Source: Grumman Energy Systems, Inc...sensitive to climate, efficiencies can range from 70...pump (60 F); swimming pool heat-ing (80...relying on back-up energy systems for the...

ALLEN L. HAMMOND; WILLIAM D. METZ

1978-07-07T23:59:59.000Z

314

Internet star shoots for a rocket revolution  

Science Journals Connector (OSTI)

... Scrounge for money, mostly without success. Badmouth NASA and established rocket manufacturers such as Boeing. Fail, usually before reaching the launch pad. And disappear. Musk has heard all ... the established rocket manufacturers are engaged in unfair trade practices. In October, he sued Boeing and Lockheed Martin in an attempt to block a proposed merger of their Atlas and ...

Tony Reichhardt

2005-12-07T23:59:59.000Z

315

Emerging Shale Gas Revolution in China  

Science Journals Connector (OSTI)

? Agri-Environment Branch, Agri-Food and Biosciences Institute, Belfast BT9 5PX, U.K. ... The US therefore has a world lead in ‘fracking’ techniques and also research on the potential adverse environmental consequences of this technology. ... China is now embarking upon substantial development of shale gas extraction but the question of major public concern is whether or not the Chinese government will try to learn from the US experience not only to benefit from the new engineering techniques but also to minimize the negative impacts of this technology on environmental and human health. ...

Yunhua Chang; Xuejun Liu; Peter Christie

2012-11-02T23:59:59.000Z

316

Energy and the English Industrial Revolution  

Science Journals Connector (OSTI)

...revised edn (1906). New York, NY:Kelley. 10...Wrigley, EA . 2010 Energy and the English Industrial...Cottrell, F . 1955 Energy and society: the relation between energy, social changes...economic development. New York, NY: McGraw-Hill...

2013-01-01T23:59:59.000Z

317

Ceramic fabricator quality revolution: A case study  

SciTech Connect (OSTI)

This case study discusses statistical process control and other quality tools in the application of continuous improvement and total quality management programs to a mature ceramic parts manufacturing operation that had been producing quality'' products for many years. By applying these tools, significant incremental improvements in process performance and product quality were achieved.

Martin, S.C. (Advanced Refractory Technologies, Inc., Buffalo, NY (United States))

1993-11-01T23:59:59.000Z

318

Revolutions in energy through modeling and simulation  

SciTech Connect (OSTI)

The development and application of energy technologies for all aspects from generation to storage have improved dramatically with the advent of advanced computational tools, particularly modeling and simulation. Modeling and simulation are not new to energy technology development, and have been used extensively ever since the first commercial computers were available. However, recent advances in computing power and access have broadened the extent and use, and, through increased fidelity (i.e., accuracy) of the models due to greatly enhanced computing power, the increased reliance on modeling and simulation has shifted the balance point between modeling and experimentation. The complex nature of energy technologies has motivated researchers to use these tools to understand better performance, reliability and cost issues related to energy. The tools originated in sciences such as the strength of materials (nuclear reactor containment vessels); physics, heat transfer and fluid flow (oil production); chemistry, physics, and electronics (photovoltaics); and geosciences and fluid flow (oil exploration and reservoir storage). Other tools include mathematics, such as statistics, for assessing project risks. This paper describes a few advancements made possible by these tools and explores the benefits and costs of their use, particularly as they relate to the acceleration of energy technology development. The computational complexity ranges from basic spreadsheets to complex numerical simulations using hardware ranging from personal computers (PCs) to Cray computers. In all cases, the benefits of using modeling and simulation relate to lower risks, accelerated technology development, or lower cost projects.

Tatro, M.; Woodard, J.

1998-08-01T23:59:59.000Z

319

Nonlinear analysis of anisotropic shells of revolution  

E-Print Network [OSTI]

Modifications REFERENCES BIBLIOGRAPHY VITA 25 34 41 48 54 55 56 57 LIST OF FIGURES Figure Page l. Shell Geometry 2. Positive Direction for Oisplacements 3. Positive Direction for Rotations 4. Positive Direction for Forces . . . 5. Positive... Direction for Moments 6 . Positive Direction for Loads 7. U Displacement for Conical Shell 8. M Displacement for Conical Shell . 9. M Displacement for Spherical Cap 10. I4 Displacement for 4. 5 psi Load, Linear and Nonlinear Solution . ll. Load vs M...

Kelley, William Rhea

1970-01-01T23:59:59.000Z

320

The environmental eScience revolution  

Science Journals Connector (OSTI)

...facing huge challenges of very high...sustainably, a challenge for physical...to harness renewable energy resources...emissions, and a challenge to biological...USA by the National Science Foundation...longer time integrations and (iii...a compute grid, so that...

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Film Cooling, Heat Transfer and Aerodynamic Measurements in a Three Stage Research Gas Turbine  

E-Print Network [OSTI]

turbine rotational speeds namely, 2400rpm, 2550rpm and 3000rpm. Interstage aerodynamic measurements with miniature five hole probes are also acquired at these speeds. The aerodynamic data characterizes the flow along the first stage rotor exit, second...

Suryanarayanan, Arun

2010-07-14T23:59:59.000Z

322

Presented at the AHS National Forum in 1989. Prediction and Measurement of the Aerodynamic Interactions Between a  

E-Print Network [OSTI]

the vortical wake generated by its rotors while hovering or flying at low speeds. The resulting interactions. With better engines, higher disk loading, higher forward speeds, and low-altitude mission requirements

323

The influence of internal friction on rotordynamic instability  

E-Print Network [OSTI]

Internal friction has been known to be a cause of whirl instability in built-up rotors since the early 1900's. This internal damping tends to make the rotor whirl at shaft speeds greater than a critical speed, the whirl speed usually being equal...

Srinivasan, Anand

2004-09-30T23:59:59.000Z

324

Sandia National Laboratories: SMART Rotor Video  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Photovoltaics Engine Test Facility Central Receiver Test Facility Power Towers for Utilities Solar Furnace Dish Test Facility Optics Lab Parabolic Dishes Work For Others...

325

Sandia National Laboratories: Rotor Design Tools  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Engine Test Facility Central Receiver Test Facility Power Towers for Utilities Solar Furnace Dish Test Facility Optics Lab Parabolic Dishes Work For Others (WFO) User...

326

Sandia National Laboratories: Rotor Aerodynamic Design  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Engine Test Facility Central Receiver Test Facility Power Towers for Utilities Solar Furnace Dish Test Facility Optics Lab Parabolic Dishes Work For Others (WFO) User...

327

Energy storage in composite flywheel rotors.  

E-Print Network [OSTI]

??ENGLISH ABSTRACT: As the push continues for increased use of renewables on the electricity grid, the problem of energy storage is becoming more urgent than… (more)

Janse van Rensburg, Petrus J.

2011-01-01T23:59:59.000Z

328

Sandia National Laboratories: functional rotor scaling  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Doppler Velocimeter EC Top Publications A Comparison of Platform Options for Deep-water Floating Offshore Vertical Axis Wind Turbines: An Initial Study Nonlinear Time-Domain...

329

Speeding the transition: Designing a fuel-cell hypercar  

SciTech Connect (OSTI)

A rapid transformation now underway in automotive technology could accelerate the transition to transportation powered by fuel cells. Ultralight, advanced-composite, low-drag, hybrid-electric hypercars--using combustion engines--could be three- to fourfold more efficient and one or two orders of magnitude cleaner than today`s cars, yet equally safe, sporty, desirable, and (probably) affordable. Further, important manufacturing advantages--including low tooling and equipment costs, greater mechanical simplicity, autobody parts consolidation, shorter product cycles, and reduced assembly effort and space--permit a free-market commercialization strategy. This paper discusses a conceptual hypercar powered by a proton-exchange-membrane fuel cell (PEMFC). It outlines the implications of platform physics and component selection for the vehicle`s mass budget and performance. The high fuel-to-traction conversion efficiency of the hypercar platform could help automakers overcome the Achilles` heel of hydrogen-powered vehicles: onboard storage. Moreover, because hypercars would require significantly less tractive power, and even less fuel-cell power, they could adopt fuel cells earlier, before fuel cells` specific cost, mass, and volume have fully matured. In the meantime, commercialization in buildings can help prepare fuel cells for hypercars. The promising performance of hydrogen-fueled PEMFC hypercars suggests important opportunities in infrastructure development for direct-hydrogen vehicles.

Williams, B.D.; Moore, T.C.; Lovins, A.B. [Rocky Mountain Inst., Snowmass, CO (United States). Hypercar Center

1997-12-31T23:59:59.000Z

330

Revolution may end repression of academic freedom in Tunisia  

Science Journals Connector (OSTI)

... , and things really degenerated around 1992 to 1993. We had pretences of democracy and liberty, but we knew that we were hopeless in terms of human rights such as ... we kept telling ourselves that this would gradually come. One got used to the limited liberty. ...

Declan Butler

2011-01-26T23:59:59.000Z

331

The Poverty of Philosophy II: "Evolution" versus "Revolution"  

Science Journals Connector (OSTI)

......identity if, as Kuhn and his followers failed to understand Planck's tongue-in-cheek mode of joking (eine scherzhafte Rede), the "opponents" who "eventually die" were considered referring to those (headed by Ostwald, 1853-1932) against Boltzmann......

J. F.

1988-01-01T23:59:59.000Z

332

The Nuclear Revolution, Relative Gains, and International Nuclear Assistance  

E-Print Network [OSTI]

Organizations, accidents, and nuclear weapons. Princeton,the likelihood of a nuclear accident (Sagan 1993, 1995). “potential for a nuclear accident. Yet it seems implausible

Kroenig, Matthew

2006-01-01T23:59:59.000Z

333

Lin Yutang and the revolution of modern Chinese humor  

E-Print Network [OSTI]

into eight sections with each section corresponding to approximately one year of Lin's contributions the China Critic magazine and specifically his "Little Critic" column. Chapter Five concludes the thesis by considering Lin's contributions as a social...

Sample, Joseph Clayton

1993-01-01T23:59:59.000Z

334

The Nuclear Revolution, Relative Gains, and International Nuclear Assistance  

E-Print Network [OSTI]

international nuclear assistance dataset, this article findsinternational nuclear assistance dataset. Table 2 presentsinternational nuclear assistance dataset. Table 3 presents

Kroenig, Matthew

2006-01-01T23:59:59.000Z

335

Is The Distributed Generation Revolution Coming: A Federal Perspective  

Office of Environmental Management (EM)

generation and transmission construction and retirements, energy efficiency and demand response programs, regional system plans, and the implications of federal and state...

336

Henry Cavendish: the catalyst for the chemical revolution  

Science Journals Connector (OSTI)

...water as a compound formed of hydrogen and oxygen rather than an element...if it indeed existed, was hydrogen, the most basic substance...such as the production of hydrogen by the interaction of water...help undermine the British economy. Because sugar from the West...

2005-01-01T23:59:59.000Z

337

An improved shell of revolution element utilizing cubic displacement functions  

E-Print Network [OSTI]

-curved sheli of revolu Lion element developed by Stricklin, et al. ' uses polynomial displac ment functions similar 11 to Eq. (I. l) in the m. ridional direction and a Fourier series in the cir "umferential direction. For axisyrmetric loadinc, this fi. Id..., and e are defined in Fig. 2-1. The rotations of the normal to the shell about the o- and s -axes are defined by e&3 and e23, respectively. Using th, strains described in Eq, (2 . 4), the strai n energy expression for orthotropi c shells may...

Mebane, Paul Mitchell

2012-06-07T23:59:59.000Z

338

The Nuclear Revolution, Relative Gains, and International Nuclear Assistance  

E-Print Network [OSTI]

204. Bhatia, Shyam. 1988. Nuclear rivals in the Middle East.of the merits of selective nuclear proliferation. Journal ofThe Case for a Ukranian nuclear deterrent. Foreign Affairs.

Kroenig, Matthew

2006-01-01T23:59:59.000Z

339

Joseph Fourier and the Revolution in Mathematical Physics  

Science Journals Connector (OSTI)

......a function not only of the material of the body but also of the...d'Alembert had used it in handling their solution (3) ofthe...was very successful in his handling of (28) and devoted the rest...been infuriated with all those diagrams of oddly-shaped functions......

I. GRATTAN-GUINNESS

1969-06-01T23:59:59.000Z

340

Cell evolution and Earth history: stasis and revolution  

Science Journals Connector (OSTI)

...depend on local recycling efficiency compared with mixing in the atmospheric pool. Section 5d develops...depended fundamentally on energy and fixed carbon provided...creeping or directional swimming rather than sedentary...and compartmentation efficiency. In Origins of mitochondria...

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Smart Bombs: Air Warfare Undergoes a Reluctant Revolution  

Science Journals Connector (OSTI)

...sig-nificant. The Russians have larger, but less accurate, warheads and are not ex-pected to have a good supply of MIRV's for...destruction of the Thanh Hoa bridge in North Vietnam, which stood intact under repeated bombing raids from 1965-68. Aviation Week...

Robert Gillette

1972-06-09T23:59:59.000Z

342

Michigan v. Bryant: The Counter-Revolution Begins  

E-Print Network [OSTI]

that “the guy in the gas station shot me. ” 223 Standingthat in 2011 there were two gas stations nearby on CadillacEven though the guy in the gas station is still there with a

Graham, Kenneth W. Jr.

2011-01-01T23:59:59.000Z

343

The Green Building Revolution: Advancing Sustainability at Exponential Speed  

Science Journals Connector (OSTI)

Civilization inherits the earth from their parents, and then nurtures the earth for their children. What is the “Triple Bottom Line (TBL or 3BL)”? The “Triple Bottom Line” is the three pillars of Sustainability: ...

Jeffrey S. Seigel

2013-01-01T23:59:59.000Z

344

The Manycore Revolution and Parallel Software Projects at NERSC  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

forward, lowering the barrier to entry for parallel computing and making parallel machines more attractive as commercial products. Why it Matters: Although MPI is currently the...

345

The shale revolution: Global gas and oil markets under transformation  

Science Journals Connector (OSTI)

Environmental concerns have also been raised about the unsustainable use of freshwater and contamination of aquifers during the fracking process. However, advances have been made...2012). Also, advances in well d...

Roberto F. Aguilera; Marian Radetzki

2014-01-01T23:59:59.000Z

346

SciTech Connect: NANOFLUIDICS REVOLUTION: PROTECTING THE WORLD...  

Office of Scientific and Technical Information (OSTI)

of the leaching and migration of radionuclides outside the cementitious barriers for nuclear waste storage facilities. This innovative method has promise for the nuclear...

347

Quest for a novel force: a possible revolution in aerospace  

Science Journals Connector (OSTI)

Conventional understanding of flight in aerospace depends primarily on the application of Newton's laws in the design of components providing propulsive and lifting forces. This reality has given incredible advances in capability during nearly a century of endeavour. But this century of achievement was preceded by millennia of speculation, literary fantasies, some tentative scientific proposals and brave practical attempts of how manned flight might be attained. However, the coming of reality did not stop the aerial speculation which has continued over the last century with various doubtful claims that have disguised an underlying seriousness seeking for alternative means of accomplishing aeronautical ambitions. Recently, three professional programmes have emerged, directed to discovering such new ways of propulsion, viz., the NASA Breakthrough Propulsion Physics programme, the BAE SYSTEMS Project Greenglow and work at ESA. The author has followed these novel developments for over half a century and is now a consultant to the BAE SYSTEMS programme. BAE SYSTEMS monitors many evolving scientific and technical advances to seek competitive advantages for its products and pays appropriate attention to the most promising solutions. Some of these are correctly described as breakthroughs and in the speculative field of advanced propulsion it seeks advice on the truth or falsehood of the many quantitative claims that have been published. The primary task is to design radically new aeronautical systems based on new physical principles. This paper sets out this strategy which has the following logic: • to account for previous claims, patents and investigations and assess their validity, • make scientific experiments of new phenomena and generate theories, • propose radically new ways (engines) of providing aeronautical forces, • assess whether any of these imaginary engines could improve aerospace performance, • if so, how significant would the improvement be? • it appears that one solution offers superb improvement, globally, for over a century ahead, • hence, it is well worth the effort to realise this in practice, • one of the proposed engines is in sequence with previous transport systems, • the best way forward is serendipitous collaboration with advanced thinkers in physics, and • Project Greenglow links new physics with novel engines and global transport performance by means of evolving techniques used in novel ways This process, described in this paper, is essentially ‘project-led research’ (sometimes called ‘focussed search’), in which theoretical possibilities are subjected to the classical process of conjecture and refutation, also employed in a previous paper published in this journal, viz., ‘Global issues affecting aeronautics’ (Prog. Aerosp. Sci. 1999; 35: 413). There is an important distinction between the UK programme and others, i.e., the inclusion of aeronautics as well as spaceflight, whereas the others deal exclusively with spaceflight.

John E Allen

2003-01-01T23:59:59.000Z

348

Jarry, Agent of Three Powers During the French Revolution  

E-Print Network [OSTI]

was at t h i s t ime a P russ ian a l l i a a o o . I t i s around t h i s proposed a l l i a n c e tha t th© i n t e r e s t centers , 1, Sent by th© C o n s t i t u t i o n a l i s t s . I t s moat ardent advocates were S i r e n (3 ) , a general i n th... Prussian neu t r a l i t y , disconcerted for a time the bolder pl-ans of B i r on and his associates ($) for b r ib ing the Pruss ian court in to an ac t i ve a l l i ance wi th France, But B i r on soon 1,Sorel , I I . , 338. 2. SoreX I I . , 333. 3...

Manning, William Roy

1902-01-01T23:59:59.000Z

349

The Culture of revolution: Revolutionary transformation in Iran.  

E-Print Network [OSTI]

??The current challenges to the authority of the Islamic Republic and mass demonstrations in opposition to the presidential elections of 2009 in Iran, have raised… (more)

Kojoori-Saatchi, Autoosa Elizabeth

2010-01-01T23:59:59.000Z

350

Revolution Now: The Future Arrives for Four Clean Energy Technologies...  

Energy Savers [EERE]

that are here today: onshore wind power, polysilicon photovoltaic (PV) modules, light-emitting diodes (LEDs), and electric vehicles (EVs). That study showed how dramatic...

351

Green Revolution: Impacts, limits, and the path ahead  

Science Journals Connector (OSTI)

...detrimental impacts of climate change on food security...provide tools to adapt to climate change. Epidemics such as...have become research leaders in their own right...multinational life sciences companies are now the leading...

Prabhu L. Pingali

2012-01-01T23:59:59.000Z

352

The Nuclear Revolution, Relative Gains, and International Nuclear Assistance  

E-Print Network [OSTI]

nature of the nuclear recipient’s security environment. ThisKeywords: Nuclear weapons proliferation; security; securitynature of the nuclear recipient’s security environment. This

Kroenig, Matthew

2006-01-01T23:59:59.000Z

353

Measurements of leakage, power loss and rotordynamic force coefficients in a hybrid brush seal  

E-Print Network [OSTI]

This thesis presents measurements of power loss and leakage in a hybrid brush seal (HBS) for increasing pressure differentials and over a range of rotor speeds. The test HBS, Haynes-25 bristle pack [~850 bristles/cm] and 45o lay angle, is 166.4 mm...

Baker, Jose Enrique

2009-05-15T23:59:59.000Z

354

Real-Time Fuzzy Control of Sensorless PM Drive Systems Dr. Kasim M. Al-Aubidy  

E-Print Network [OSTI]

oscillator controls the motor speed. The other mode is the closed-loop mode, in which the inverter power is essential for controlling the power devices of the inverter. The main problem with present rotor position without the new trends in softcomputing. There is a lot of literature on the design of AC drive systems

355

Fuzzy logic control implementation in sensorless PM drive systems  

E-Print Network [OSTI]

is essential for controlling the power devices of the inverter. The main problem with present rotor position be difficult to implement without the new trends in softcomputing. There is a lot of literature on the design an independent oscillator controls the motor speed. The other mode is the closed-loop mode, in which the inverter

356

Flow visualization and analysis of aerodynamically detuned supersonic rotors  

Science Journals Connector (OSTI)

The effect of aerodynamic detuning on the supersonic steady and unsteady blade passage flow field is experimentally investigated on a free surface water table by means of color Schlieren and shadowgraph flow v...

C. S. Farmer; S. Fleeter

1988-01-01T23:59:59.000Z

357

SMART Wind Turbine Rotor: Data Analysis and Conclusions  

Broader source: Energy.gov [DOE]

This report documents the data post-processing and analysis performed to date on the field test data.

358

DOE and Sandia National Laboratories Develop National Rotor Testbed...  

Energy Savers [EERE]

The SWiFT facility, which was commissioned this July, is unique in that it utilizes wind turbines that are large enough to represent the physics relevant to utility-scale machines,...

359

Chaos in a rotor system supported by ball bearings  

E-Print Network [OSTI]

. The positioning of the probes can be seen in Figure l. These voltages were read digitally using a computer equipped with an Analog/Digital Card. MATLAB Simulink was used to interface with the data acquisition card and obtain the data. A Simulink model... enters the window it is perturbed so that it is forced into the orbit just below the window. This orbit can be of any period. The MATLAB Simulink implementation of this controller used for experimentation is shown below: Figure 14: Simulink Model...

Fisher, James Robert, 1979-

2013-02-22T23:59:59.000Z

360

Magnetism and Mott transition: A slave-rotor study  

E-Print Network [OSTI]

Motivated by the debate of the spin-density-wave (SDW) versus local-moment (LM) picture in the iron-based superconducting (FeSC) materials, we consider a two-band orbital-symmetric Hubbard model in which there is robust ...

Ko, Wing Ho

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Symmetry and dynamics of molecular rotors in amphidynamic molecular crystals  

Science Journals Connector (OSTI)

...similar in magnitude to the gas phase rotational barrier for the methyl groups...Medicine, University of Missouri-Columbia, 1514 Research...dispersion in mineral oil) in 500 mL of 1,2-dimethoxyethane...Eibling and J. Li, Unique gas and hydrocarbon adsorption...

Steven D. Karlen; Horacio Reyes; R. E. Taylor; Saeed I. Khan; M. Frederick Hawthorne; Miguel A. Garcia-Garibay

2010-01-01T23:59:59.000Z

362

Symmetry and dynamics of molecular rotors in amphidynamic molecular crystals  

Science Journals Connector (OSTI)

...axial symmetry order Cn represented with a heavy line with the enclosure formed by their close...Nano & Molecular Medicine, University of Missouri-Columbia...20 g of a 60% dispersion in mineral oil) in 500 mL of 1,2-dimethoxyethane...

Steven D. Karlen; Horacio Reyes; R. E. Taylor; Saeed I. Khan; M. Frederick Hawthorne; Miguel A. Garcia-Garibay

2010-01-01T23:59:59.000Z

363

Hybrid Rotor Compression for Multiphase and Liquids-Rich Wellhead  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Introduction OsComp Systems sought out to design a compressor that could help to make the production and transportation of natural gas more cost effective for producers,...

364

Bending vibration measurement on rotors by laser vibrometry  

Science Journals Connector (OSTI)

A new technique is proposed for noncontact measurement of bending vibration directly from a rotating component. This notoriously difficult and previously unattained measurement is a...

Miles, Toby; Lucas, Margaret; Rothberg, Steve

1996-01-01T23:59:59.000Z

365

A Design Study ofa 1MW Stall Regulated Rotor  

E-Print Network [OSTI]

of special tailored airfoils has been found to be around 4% on the annual energy production and 1 55 4.8 Summary 56 5 Comparison with LM 24.0 59 5.1 Assumptions 59 5.2 Geometry 60 5.3 Annual energy production and loads 62 5.4 Materia

366

Engineering rotor ring stoichiometries in the ATP synthase  

Science Journals Connector (OSTI)

...for the future. The proposed strategy for altering the ion-to-ATP...force fields: Limitations of gas-phase quantum mechanics...sequencing (Scientific Research and Development GmbH and Eurofins MWG GmbH...biology. Proton-powered turbine of a plant motor. Nature 405...

Denys Pogoryelov; Adriana L. Klyszejko; Ganna O. Krasnoselska; Eva-Maria Heller; Vanessa Leone; Julian D. Langer; Janet Vonck; Daniel J. Müller; José D. Faraldo-Gómez; Thomas Meier

2012-01-01T23:59:59.000Z

367

SMART Wind Turbine Rotor: Data Analysis and Conclusions  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

system HP high-pressure (the nominally upwind surface of a HAWT blade) IMU inertial measurement unit inboard toward the root end of a wind turbine blade LE leading edge of wind...

368

CFD Simulation of the NREL Phase VI Rotor  

E-Print Network [OSTI]

The simulation of the turbulent and potentially separating flow around a rotating, twisted, and tapered airfoil is a challenging task for CFD simulations. This paper describes CFD simulations of the NREL Phase VI turbine that was experimentally characterized in the 24.4m x 36.6m NREL/NASA Ames wind tunnel (Hand et al., 2001). All computations in this article are performed on the experimental base configuration of 0o yaw angle, 3o tip pitch angle, and a rotation rate of 72 rpm. The significance of specific mesh resolution regions to the accuracy of the CFD prediction is discussed. The ability of CFD to capture bulk quantities, such as the shaft torque, and the detailed flow characteristics, such as the surface pressure distributions, are explored for different inlet wind speeds. Finally, the significant three-dimensionality of the boundary layer flow is demonstrated.

Song, Yang

2014-01-01T23:59:59.000Z

369

Substantially Parallel Flux Uncluttered Rotor Machines (U-Machine...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

brushless adjustable field excitation for high starting torque, field weakening, and power factor improvement and novel locks for higher peak speed. This novel machine shows...

370

Sandia National Laboratories: capture more wind with longer rotors  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Plan Webinar Wednesday, Jan. 14 Sandian Presents on PV Failure Analysis at European PV Solar Energy Conference and Exhibition (EU PVSC) EC Top Publications Design and Analysis for...

371

Sandia National Laboratories: Rotor Blade Sensors and Instrumentation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Engine Test Facility Central Receiver Test Facility Power Towers for Utilities Solar Furnace Dish Test Facility Optics Lab Parabolic Dishes Work For Others (WFO) User...

372

Development of integral bladed rotor using linear optimisation technique  

Science Journals Connector (OSTI)

Bladed disks are the most flexible elements in high speed rotating machinery. Stress analysis of these elements present some challenges. These challenges stem from high stress gradients due to contact faces, the non-linearities attending conforming contact with friction. Thermal gradients are also encountered across the disc bore and rim due to uneven temperature distribution. The rim of the disc is made heavier to resist the centrifugal pull of the blade, thus making the assembly heavier. Investigations have been carried out to develop and improve 'blisks' which are integrated version of blades and disc, offering significant weight saving. The present paper describes the possible development process of upgrading a general purpose conventional bladed disc of a single stage compressor into blisk, using linear programme, a finite element analysis tool for linear optimisation, as a dedicated 'design-tool' keeping the same operating conditions and the allowable design limits through numerical models. Design methodology, burst-failure criteria of blisk and bladed disc are discussed in full length. This tool developed exploits the quick convergence ability of a linear system for handling large iterations and overcomes the limitation imposed by material non-linearity, over-speed and burst margin for all decision points based on stress, strain and displacement, in the design-flow process.

K. Kumar; S.L. Ajit Prasad; K. Ramachandra

2012-01-01T23:59:59.000Z

373

Engineering rotor ring stoichiometries in the ATP synthase  

Science Journals Connector (OSTI)

...Limitations of gas-phase quantum mechanics...the University of Technology...Scientific Research and Development GmbH and Eurofins...10 Genetic fusion technology (3, 4) Thermophilic...10 Genetic fusion technology...Proton-powered turbine of a plant motor...

Denys Pogoryelov; Adriana L. Klyszejko; Ganna O. Krasnoselska; Eva-Maria Heller; Vanessa Leone; Julian D. Langer; Janet Vonck; Daniel J. Müller; José D. Faraldo-Gómez; Thomas Meier

2012-01-01T23:59:59.000Z

374

Characteristics of a multiple disk pump with turbulent rotor flow  

E-Print Network [OSTI]

DIRHETER IINIt tl, DISCHARGE OIANETER IINlt 3. CLEARANCE OETHEEN DISKS 0. 13636 IN. TYPE SEALJ PRCKING DISKFLO PUHP; NODEL K03 TOTRL HERO HORSEPOHER X EFFICIENCY + NPSH AVAIL V Figure 12. Performance of the 11 Disk Pump at 890 rpm (Test 2) C& C...: D. 13636 IN 111'E 5EAI. PACK(NO OISKFLD PL'. "P: HDD L 40 TOTAL HERO HDRSEPOHER X EFFICIENCY + NPSH AVAIL Y Figure 14 . Performance of the 1 1 Disk Pump at 1 790 rpm ( Tes t 1 ) CV o O C) CI O C) O \\ C CC C O I-!-W I o O O O 6 )3...

Roddy, Patrick James

1985-01-01T23:59:59.000Z

375

Michigan State University Press  

E-Print Network [OSTI]

..................................................................... 13 Labor and Industrial Revolution ........................................ 6 Lawns

Liu, Taosheng

376

Unfolding the conical zones of the dissipation-induced subcritical flutter for the rotationally symmetrical gyroscopic systems  

E-Print Network [OSTI]

Flutter of an elastic body of revolution spinning about its axis of symmetry is prohibited in the subcritical spinning speed range by the Krein theorem for the Hamiltonian perturbations. Indefinite damping creates conical domains of the subcritical flutter (subcritical parametric resonance) bifurcating into the pockets of two Whitney's umbrellas when non-conservative positional forces are additionally taken into account. This explains why in contrast to the common intuition, but in agreement with experience, symmetry-breaking stiffness variation can promote subcritical friction-induced oscillations of the rotor rather than inhibit them.

Oleg N. Kirillov

2008-09-20T23:59:59.000Z

377

Dynamic alliances : political economy of labor organization in post-revolution Egypt  

E-Print Network [OSTI]

The last decade in Egypt has witnessed significant innovations in the structure of social organizations spurred by the fraying of central government legitimacy. Within this dense network of new social actors independent ...

Lopez, Sofia Alejandra

2013-01-01T23:59:59.000Z

378

A review of "Rebranding Rule: The Restoration and Revolution Monarchy, 1660-1714" by Kevin Sharpe  

E-Print Network [OSTI]

in this series, Sharpe argues that the successful fashioning of the royal image was vital to an early modern monarch’s grasp on power and authority. For Charles II, this representation of rule was trickier than for his forebears. The events of 1649 and those... that followed had profound revolutionary consequences, throwing the very meaning of kingship into question. The genie of republicanism, once released from the bottle, could never be completely put back inside. Powerful images of royal authority flourished...

Patterson, Catherine

2014-01-01T23:59:59.000Z

379

Picturing Soldaderas: Agency, Allegory, and Memory in Images of the 1910 Mexican Revolution  

E-Print Network [OSTI]

project  was   “reviving  in  an  ‘illustrative  form’  the  heroic  struggle  of  our  country  for  ‘Land  and   Liberty. ’”    

Orzulak, Jessica Lynn

2014-01-01T23:59:59.000Z

380

Revolutions of the heart : cultivating love as a means for personal & collective transformation  

E-Print Network [OSTI]

This thesis is an exploration of people and places who, through our own lived experiences, have come to realize that the physical, ideological, and institutional separation caused by dominant American cultures and institutional ...

Supple, Courtney Rampe

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Women weaving the dream of the revolution in the American continent  

E-Print Network [OSTI]

as a starting point for Indian populations identifyingfigures. ” “The Indian extends his arc or points histhesis” on Mexican Indian women. His point of departure drew

Angeleri, Sandra

2006-01-01T23:59:59.000Z

382

Pennsylvania Sparks an Energy Efficiency Revolution: Weatherization Assistance Close-Up Fact Sheet  

SciTech Connect (OSTI)

Pennsylvania demonstrates its commitment to technology and efficiency through the Weatherization Program. Weatherization uses advanced technologies and techniques to reduce energy costs for low-income families by increasing the energy efficiency of their homes.

D& R International

2001-10-10T23:59:59.000Z

383

Repräsentationen der OUN und UPA im kollektiven Gedächtnis der Ukraine nach der Orangen Revolution.  

E-Print Network [OSTI]

??Die vorliegende Diplomarbeit beschäftigt sich mit der Repräsentation zweier nationalistischer Organisationen während des Zweiten Weltkrieges in der Gedächtnispolitik der Ukraine. Die Organisation Ukrainischer Nationalisten (OUN)… (more)

Rauch, Katharina

2012-01-01T23:59:59.000Z

384

The New Green Revolution: Sustainable Agriculture for the Caribbean Through the Use of Renewable Energy  

Science Journals Connector (OSTI)

Application of renewable energy technologies can serve as an effective mitigation tool for climate change and lead to energy security for the Caribbean region. There are...

Indra Haraksingh

2013-01-01T23:59:59.000Z

385

Travel, work, and telecommunications: a view of the electronics revolution and its potential impacts  

E-Print Network [OSTI]

Jovanis P. (1983) Telecommunications and alternative workple TRAVEL, WORK, AND TELECOMMUNICATIONS: A VIEW OF THEon opportunities for telecommunications to replace, or

Garrison, William L.; Deakin, Elizabeth

2006-01-01T23:59:59.000Z

386

Passive revolution in the green economy: activism and the Belo Monte dam  

Science Journals Connector (OSTI)

Belo Monte is slated to be the world’s third largest dam, and it is Brazil’s largest infrastructure project, at a cost of at least USD 13 billion. It is forecast to produce around 11,000 GW of energy

Eve Bratman

2014-11-01T23:59:59.000Z

387

The World Our Grandchildren Will Inherit: The Rights Revolution and Beyond  

E-Print Network [OSTI]

Following on Keynes’s Economic Possibilities for Our Grandchildren, this paper develops conjectures about the world we will leave to our grandchildren. It starts by outlining the 10 most important trends that have defined ...

Acemoglu, Daron

2012-04-06T23:59:59.000Z

388

The time revolution of 1859 and the stratification of the primeval mind  

Science Journals Connector (OSTI)

...skilled design they had turned an old concept into a new object for scientific enquiry. That concept was the existence of pre-Adamite Man that had exercised theologians, philologists and those interested in the origins of human society for more than 300-years...

2011-01-01T23:59:59.000Z

389

The Sober Revolution: The Political and Moral Economy of Alcohol in Modern France, 1954-1976  

E-Print Network [OSTI]

organisations vitivinicoles de 1884 aux AOC. Dijon: Éditionsd’origine contrôlée (AOC) labeling system and discouragedrevolution. v Abbreviations AOC APV CAP CCDBN CDDCA CGA CGB

Bohling, Joseph Estle

2012-01-01T23:59:59.000Z

390

Revolution Now: The Future Arrives for Four Clean Energy Technologies-- 2014 Update  

Broader source: Energy.gov [DOE]

This report provides an update and finds that cost reductions and deployment have continued to advance in the past year for onshore wind power, polysilicon photovoltaic (PV) modules, light-emitting diodes (LEDs), and electric vehicles (EVs).

391

Precision engineering for astronomy: historical origins and the future revolution in ground-based astronomy  

Science Journals Connector (OSTI)

...absorption in intermediate media such as dust and gas. One of the most challenging applications...chemistry and physical conditions in the cold gas in galaxies-the fundamental fuel for star...Online version in colour.) Figure 7. The Hale 200-inch telescope-completed in 1948...

2012-01-01T23:59:59.000Z

392

Out of the Closed World: how the Computer Revolution helped to End the Cold War  

E-Print Network [OSTI]

Intuitive Science of Thermonuclear War. Harvard UniversityHerman Kahn, author of On Thermonuclear War (1960), with hisIntuitive Science of Thermonuclear War. Harvard University

Skinner, Rebecca Elizabeth

2013-01-01T23:59:59.000Z

393

13. Engineering and Computer Science in Action: A Course on "The Structure of Engineering Revolutions"  

E-Print Network [OSTI]

history can successfully enrich the education of advanced computer science and engineering students. MIT a better understanding of engineering practice by conducting original research on the history157 13. Engineering and Computer Science in Action: A Course on "The Structure of Engineering

Medina, Eden

394

Picturing Soldaderas: Agency, Allegory, and Memory in Images of the 1910 Mexican Revolution  

E-Print Network [OSTI]

Consciousness:  James  Agee  and  Walker   Evans,  ‘Let  Consciousness:  James  Agee  and  Walker   Evans,   ‘Let  

Orzulak, Jessica Lynn

2014-01-01T23:59:59.000Z

395

Traditional revolution : formalizing the informal : a proposal for the "periphery urbanite" Lagos, Abuja & Port-Harcourt  

E-Print Network [OSTI]

The inherited modernist principles of urban design and development policy have left Social exclusion in its wake.The cities founded during colonial times and there-after continue the legacy of colonial urban development. ...

Rhodes-Vivour, Patrick

2008-01-01T23:59:59.000Z

396

Women weaving the dream of the revolution in the American continent  

E-Print Network [OSTI]

Partidos y Sindicatos en Venezuela, 1936-1950. Centauro,en Cuadernos de Cendes, Universidad Central de Venezuela,Caracas, Venezuela, Año Segundo, Enero-Abril 1994, pp. 25-

Angeleri, Sandra

2006-01-01T23:59:59.000Z

397

Evolution, revolution or saltation scenario for the emergence of modern cultures?  

Science Journals Connector (OSTI)

...ornaments, consisting of perforated marine shells belonging to a single species...figure-1 p) with clear evidence of use-wear, some bearing traces of ochre come...Contrebandiers in Morocco [67]. Other marine shells interpreted as beads (figure-1...

2011-01-01T23:59:59.000Z

398

Review: Solar Revolution: The Economic Transformation of the Global Energy Industry by Travis Bradford  

E-Print Network [OSTI]

the Present." A brief history of energy is presented first.solar energy. A short history of solar energy along with its

Mirza, Umar Karim

2007-01-01T23:59:59.000Z

399

Precision engineering for astronomy: historical origins and the future revolution in ground-based astronomy  

Science Journals Connector (OSTI)

...Edinburgh EH9 3HJ, UK 2 European Southern Observatory, Karl-Schwarzschild-Strabetae 2, 85748-Garching bei Munchen, Germany One...regime. However, sub-millimetre telescopes use the same two mirror design as most optical telescopes. A sub-millimetre antenna...

2012-01-01T23:59:59.000Z

400

1The recent biotechnology revolution resembles information 1 (Professor of Computer Science, Mathemat-  

E-Print Network [OSTI]

to CIA World Factbook 2 , 1,166,079,217 people 2 The World Factbook by Central Intelligence Agency. https://www.cia

Mishra, Bud

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

The Communications Revolution and Health Inequalities in the 21st Century: Implications for Cancer Control  

Science Journals Connector (OSTI)

...treatment through survivorship or end-of-life care. The current...amount of data generated by humankind increased from 150 exabytes...posttreatment or during the end-of-life stages (13, 14...life during survivorship or end-of-life. Cancer Disparities...

K. Viswanath; Rebekah H. Nagler; Cabral A. Bigman-Galimore; Michael P. McCauley; Minsoo Jung; and Shoba Ramanadhan

2012-10-01T23:59:59.000Z

402

Rep. Rivers: Military Spokesman Hopes To See McNamara Revolution Upset  

Science Journals Connector (OSTI)

...felt was worth the high cost over conven-tional power...effort to off-set the cost of the big pay bill...in-novations (to which cost-effectiveness analysis...aIuthorize the use of nuclear ss!eapons to savc themii...than risk myi own life bs throw ing the Bomihb...

Luther J. Carter

1968-03-15T23:59:59.000Z

403

Issue 273 5 june 2014 Sharing stories of Imperial's community robot revolution  

E-Print Network [OSTI]

: "Innovation is critical to deliver an increasingly cost efficient and less carbon intensive industry will draw on world-class expertise to carry out research to address critical issues for gas sustainability in both the short and long-term: energy efficiency, gas innovation, and carbon capture, storage and use

404

Nature's green revolution: the remarkable evolutionary rise of C4 plants  

Science Journals Connector (OSTI)

...plants wastes captured solar energy and causes a net...southern Texas-central Mexico, central Asia...model of planetary energy balance that collapses...sensitive to changes in solar forcing, especially...without the effects of solar forcing) shown in...

2006-01-01T23:59:59.000Z

405

he Green Revolution of the 20th generated unparalleled levels of agricultural  

E-Print Network [OSTI]

converts soluble nitrate to N gas, and plant and microbial biomass retains N. Nitrogen sinks include productivity based on advances in crop breeding � and ample inputs of inexpensive nitrogen (N) fertilizer and marine waters leading to loss of fisheries and spawning habitats and creation of multitudes of hypoxic

David, Mark B.

406

A linear dynamic analysis of stiffened shells of revolution by the matrix displacement method  

E-Print Network [OSTI]

displacement approach and Houbolt's numerical method of integration. The stiffened shell structure considered here is a combination of shell structure with either meridional or circumferential stiff- eners or both. The structure is idealized... Survey Shell Structures. Stiffened Shell Structures. Objective Scope of Investigation. 1 4 4 8 13 15 II GENERAL DESCRIPTION OF THE MATRIX DISPLACEMENT METHOD. . . . . . . . . . . . . . . . . . . . . 17 Static Analysis Dynamic Analysis. 17...

Hoover, Charlie Doll

2012-06-07T23:59:59.000Z

407

THE INDUSTRIOUS REVOLUTION, THE INDUSTRIOUSNESS DISCOURSE, AND THE DEVELOPMENT OF MODERN ECONOMIES  

E-Print Network [OSTI]

modify the results. 10 Finally, there is also a fundamental problem with publications in the steam-press era (i.e. roughly after 1830). By allowing very large editions to be printed, it radically expanded the circulation and diffusion of some... the traditional meaning of luxury (hedonism) and industriousness. Desire could not be the real 20 engine of the sort continuous material progress he called luxury, for all worldly pleasures could eventually be satiated. On the contrary, he saw industriousness...

Litvine, Alexis D.

2014-05-08T23:59:59.000Z

408

A review of "1688: The First Modern Revolution" by Steve Pincus  

E-Print Network [OSTI]

,? the Edinburgh-born Bishop Gilbert Burnet somewhat surprisingly announced in 1689, quoted 348); at the same time he sees their purview beyond the boundaries of the nation, as his extensive account of the impact of Robert Molesworth?s Account of Denmark (1693...

Key, Newton

2012-01-01T23:59:59.000Z

409

Nature's green revolution: the remarkable evolutionary rise of C4 plants  

Science Journals Connector (OSTI)

...rapidly than C3 grasses in hot, open conditions after a recent burn (Knapp Medino 1999). Herbivores may also tip the balance between...Carboniferous limestone series stem scars 24.8 23.3 88 BurghLee Pit, UK Carboniferous limestone series internal stem 23.5 21...

2006-01-01T23:59:59.000Z

410

Drag and Drop Streaming: the Next Revolution in E-Learning Laura Guerra  

E-Print Network [OSTI]

Terms Management, Design, Human Factors, Standardization. Keywords University of Houston, VClass in a streaming format. In just three simple steps professors are able to capture and publish lectures on-line what was said in class, but also what was displayed on the overhead and what was written on the board

Azevedo, Ricardo

411

1. The Next Revolution in Wireless and Mobility How RFID and Sensing Is Automating  

E-Print Network [OSTI]

No Greenwashing Here: How RFID Helps the Environment 3 Powerful Examples: EV Power Station Billing, Pedal Power Line with Patron ID and Point-of-Sale Wristbands RFID and the Beverage Market (part 5) Serving Up Soft

Roussos, George

412

Exodus industrious : a new American dream for the next industrial revolution  

E-Print Network [OSTI]

Exodus Industrious has many beginnings, but few endings. Exodus Industrious is two parallel tales, told as one, which ultimately arrive at a critical moment in the history of the Americanism. Exodus is the story of capitalism ...

Marshall, Alexander William

2013-01-01T23:59:59.000Z

413

Radical Catholic resistance to the Mexican Revolution: the Cristero Rebellion and the Sinarquista Movement  

E-Print Network [OSTI]

the status quo of Mexican politics. This thesis demonstrates that Catholic resistance against Mexico?s anticlerical government was a changing process. This struggle, which emerged as early as the Bourbon reforms of the eighteenth century, depended... ...............................................................................8 The Bourbon Reforms...........................................................................12 Conservatism vs. Liberalism .................................................................14...

Velazquez, Martin Tomas

2009-05-15T23:59:59.000Z

414

The Sober Revolution: The Political and Moral Economy of Alcohol in Modern France, 1954-1976  

E-Print Network [OSTI]

a broad coalition emerged to support the modern French wineroots that fixed French identity. 56 A broad consensus had

Bohling, Joseph Estle

2012-01-01T23:59:59.000Z

415

21H.802 Modern Latin America, 1808-Present: Revolution, Dictatorship, Democracy, Fall 2002  

E-Print Network [OSTI]

Selective survey of Latin American history from the wars of independence at the start of the nineteenth century to the present. Issues studied include: independence and its aftermath, slavery and its abolition, Latin America ...

Ravel, Jeffrey S.

416

How to manage a revolution: Isaac Newton in the early twentieth century  

Science Journals Connector (OSTI)

...received his scientific training in an environment that valued precision measurement and...utility, for the astronomer and the engineer, and in the science of everyday life...mathematicians to a hostile intellectual environment, Hist. Stud. Phys. Sci. 3, 1-116...

2014-01-01T23:59:59.000Z

417

Achieving business process change in the public sector: revolution or evolution?  

Science Journals Connector (OSTI)

This paper explores the relationship between intranet technology and business process change (BPC) using case studies conducted in two Irish public sector hospitals. The management method used in the two case studies was diametrically opposed â?? one chose an evolutionary implementation, while the other commenced from a revolutionary strategic perspective. Given the unique characteristics of public sector organisations, this paper proposes that evolutionary based development is better positioned to achieve BPC using intranet technology. This is due to the fact that cultural acceptance of the technology is a critical success factor in public sector organisations due to their individual departmental structures.

Martin Hughes; William Golden

2004-01-01T23:59:59.000Z

418

SciTech Connect: From the Building to the Grid: An Energy Revolution...  

Office of Scientific and Technical Information (OSTI)

SYSTEMS; INTEGRATION; MODELLING; MODELING; DUBLIN; BUILDING; GRID; Energy Analysis; Electricity, Resources, and Buildings Systems Word Cloud More Like This Full Text preview image...

419

Nanotechnology Patents : The next technological revolution and the future of the patent system.  

E-Print Network [OSTI]

??Experiences from ICT and biotechnology have shown that the current patent system has increasing difficulties with the numbers and complexity of patent applications. As a… (more)

Helwegen, Wim

2013-01-01T23:59:59.000Z

420

Perceptions of Duty and Motivations for Service of American Seagoing Officers During the American Revolution  

E-Print Network [OSTI]

small ships, the brig Boston and schooner Hawk, but was roughly handled in an engagement with an inferior British warship, the twenty-gun Glasgow, as it cruised off Block Island on April 6. Although outgunned and outnumbered, Captain Tyringham Howe... Monk and 32-gun frigate Quebec, Barney directed his helmsman to obey the opposite of his orders yelled within earshot of General Monk. The ruse worked; Barney and his crew soon captured General Monk with a loss of only four men dead and eleven...

Duerksen, Benjamin

2012-07-16T23:59:59.000Z

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

The space photometry revolution and our understanding of RR Lyrae stars  

E-Print Network [OSTI]

The study of RR Lyrae stars has recently been invigorated thanks to the long, uninterrupted, ultra-precise time series data provided by the Kepler and CoRoT space telescopes. We give a brief overview of the new observational findings concentrating on the connection between period doubling and the Blazhko modulation, and the omnipresence of additional periodicities in all RR Lyrae subtypes, except for non-modulated RRab stars. Recent theoretical results demonstrate that if more than two modes are present in a nonlinear dynamical system such as a high-amplitude RR Lyrae star, the outcome is often an extremely intricate dynamical state. Thus, based on these discoveries, an underlying picture of complex dynamical interactions between modes is emerging which sheds new light on the century-old Blazhko-phenomenon, as well. New directions of theoretical efforts, like multi-dimensional hydrodynamical simulations, future space photometric missions and detailed spectroscopic investigations will pave the way towards a mo...

Szabó, R; Paparó, M; Chapellier, E; Poretti, E; Baglin, A; Weiss, W W; Kolenberg, K; Guggenberger, E; Borgne, J -F Le

2014-01-01T23:59:59.000Z

422

Accurate Automatic Localization of Surfaces of Revolution for Self-Calibration and Metric  

E-Print Network [OSTI]

such as the Straight Ho- mogeneous Generalized Cylinder (SHGC) were extensively used in the past for the specific on this problem is described in [9], where a bottom-up strategy is used to recognize SHGC models from B's), which are a subclass of SHGC's. In [13] it is shown that a single SOR view can provide two constraints

Colombo, Carlo

423

RECONSTRUCTION OF SURFACE OF REVOLUTION FROM MULTIPLE UNCALIBRATED VIEWS: A BUNDLE-ADJUSTMENT APPROACH  

E-Print Network [OSTI]

] and [2], which provides algorithms for identifying the axis and the ending cross- sections of SHGC

Wong, Kenneth K.Y.

424

Food security: contributions from science to a new and greener revolution  

Science Journals Connector (OSTI)

...044007 ) EEA 2007 Estimating the environmentally compatible bioenergy potential from agriculture. Copenhagen, Denmark: European...of the 7th International Wheat Conference, Mar del Plata, Argentina. Hoekstra, A. Y. , Chapagain, A. K. 2007 Water footprints...

2010-01-01T23:59:59.000Z

425

A computer procedure for evaluating the effects of loading thin isotropic shells of revolution  

E-Print Network [OSTI]

geometry. riis method is used. in th? soluticn of the pro'blem. The computer used for thc program checxout and the test runs was the 1Bld 70P4 at the Texas AQN University Data Processing Center. Plot- ting wss done on CALCOii2 digit 1 plotter...-I (J). = 2C(ds)(Z. I - 2 ~I) (K). = 2(e + 1)(ds)ripn (ri+I i-I I + 2(ds)r. (r. (p - p ) + p (r. + - r. )] r ni+I ni-I ni 1+I 1 I (rgp (ds) + 2(ds)e((Z ~I - & 1)(r p )) 10 Solution of Bquations 1'quations of the form used in equations (14) and (15...

Petersen, Gary Stanley

2012-06-07T23:59:59.000Z

426

The early research of John B. Watson: Before the behavioral revolution  

E-Print Network [OSTI]

Presents an overview of Watson's pre-1913 research that focuses on (1) his doctoral thesis and 1st book; (2) his studies with H. Carr on the role of the various sense modalities in rats' maze learning; (3) his collaboration with R. M. Yerkes...

Todd, James T.; Morris, Edward K.

1986-01-01T23:59:59.000Z

427

Citizenship and Emancipation: Voting Rights during the Haitian Revolution after 1793  

E-Print Network [OSTI]

into the debates that gave way to emancipation throughout the French Republic in 1794. Because emancipation took place under the Constitution of 1793, which extended voting rights to all male citizens, those who had once been enslaved were fully enfranchised...

Gaffney, Jennifer Ann

2014-04-23T23:59:59.000Z

428

E-Print Network 3.0 - african green revolution Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

arrangements aimed... and technical knowledge that was not available when the Green ... Source: Kammen, Daniel M. - Renewable and Appropriate Energy Laboratory,...

429

Review: Solar Revolution: The Economic Transformation of the Global Energy Industry by Travis Bradford  

E-Print Network [OSTI]

are renewable as well. Solar energy, one such resource, isThe Inevitability of Solar Energy," contains one chapter inenergy system, introduces solar energy with its merits and

Mirza, Umar Karim

2007-01-01T23:59:59.000Z

430

From the Building to the Grid: An Energy Revolution and Modeling...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and Modeling Challenge Workshop Proceedings Benjamin Kroposki and Connie Komomua National Renewable Energy Laboratory Mark O'Malley University College Dublin Technical Report NREL...

431

New Scientist|Space|Technology|Environment|New Scientist Jobs|Subscribe to New Scientist New Scientist, 2578, 18 November 2006  

E-Print Network [OSTI]

revolution will be recognised as a transformation as significant as the industrial revolution. The evolution

Horvitz, Eric

432

Cyclogiro windmill  

DOE Patents [OSTI]

A cyclogiro windmill has a rotor provided with blades shaped in the configuration of symmetrical airfoils and actuators to pivot the blades about axes parallel to the axis of rotation for the rotor. The actuator for each blade constantly changes the rock angle for the blade, that is its angle with respect to a reference on the rotor, and this modulation is such that the blade in making a revolution around the axis of rotation for the rotor undergoes an interval of static operation wherein its angle of attack is for the most part constant and less than the static stall angle, a short interval where the blade flips to position in which its opposite surface is presented toward the free wind, a short interval of dynamic operation wherein the angle of attack exceeds the static stal angle, another interval of static operation at an angle of attack of essentially the same magnitude as before, another interval of blade flip, and another interval of dynamic operation. During the intervals of dynamic operation, the blades experience a significant increase in lift force without a corresponding increase in drag, so that a high lift-to-drag ratio develops. The blades during dynamic operation further develop strong vortices which are directed outwardly at the sides of the windmill stream tube, and this increases the width of the stream tube, causing a greater mass of air to flow through the rotor. The short intervals of operation under dynamic conditions enable the blades to extract more energy from the free wind than would be possible if the blade operated solely under static conditions, and this in turn renders the windmill more useful in moderate velocity winds as well as high velocity winds.

Brulle, R.V.

1981-09-03T23:59:59.000Z

433

Dynamic modeling and optimal control of DFIG wind energy systems using DFT and NSGA-II  

Science Journals Connector (OSTI)

Abstract Once a doubly-fed induction generator (DFIG) is subjected to a disturbance by a change in the wind speed, the stator flux cannot change instantly. Under this condition, rotor back-EMF voltages reflect the effects of stator dynamics on rotor current dynamics, and have an important role on the oscillations of the rotor current. These oscillations decrease the DFIG system reliability and gear lifetime. Moreover, by focusing only on small signal analysis, the dynamic damping performance immediately following such disturbances is often degraded. Additional improvement in performance will be achieved if discrete Fourier transform (DFT) is used to quantify damping characteristic of the rotor current during changes of the operating points. This paper introduces an optimization technique based on non-dominated sorting genetic algorithm-II (NSGA-II) incorporating DFT analysis to achieve better control performance for DFIG system stability. Considering small signal stability, the main purpose of the control system in the present paper is to increase the system damping ratio as well as to guarantee enough stability margin. Eigenvalue analysis and time-domain simulations have been presented to demonstrate that the proposed optimizing method yields better control performance in comparison with one designed using mere eigenvalue relocation.

M. Zamanifar; B. Fani; M.E.H. Golshan; H.R. Karshenas

2014-01-01T23:59:59.000Z

434

A power control strategy for flywheel doubly-fed induction machine storage system using artificial neural network  

Science Journals Connector (OSTI)

A large-capacity low-speed flywheel energy storage system (FESS) based on a doubly-fed induction machine (DFIM) consists of a wound-rotor induction machine and a back-to-back converter rated at 30–35% of the machine power rating used for rotor excitation. This system has been promoted as a viable mean of energy storage for power system applications as grid frequency support/control, uninterruptible power supply (UPS), power conditioning, and voltage sag mitigation. This paper presents a simple power control strategy based on artificial neural networks (ANN) to charge/discharge a flywheel DFIM (FW-DFIM) storage system while maintaining controllable grid side power. The proposed controller is based on conventional vector control system supplemented by an ANN-based current decoupling network used to develop the required rotor current components based on the required grid power level and flywheel instantaneous speed. The controller is designed to avoid overloading both stator and rotor circuits while the flywheel is charged/discharged. Additionally, it avoids using the required outer power loop or a hysteresis power controller, hence, simplifies the overall control algorithm. The validity of the developed concept along with the effectiveness and viability of the control strategy in power system applications is confirmed by computer simulation using Matlab/Simulink for a medium voltage 1000hp FW-DFIM. The simulation study is carried out for uninterruptible power supply (UPS) applications and power leveling to improve the quality of electric power delivered by wind generators.

A. Abdel-Khalik; A. Elserougi; A. Massoud; S. Ahmed

2013-01-01T23:59:59.000Z

435

Computation of the National Renewable Energy Laboratory Phase-VI Rotor in Pitch Motion during Standstill  

SciTech Connect (OSTI)

Previously, computational fluid dynamics (CFD) computations of dynamic stall on wind turbine blades have been performed for stand still conditions with moderate success by among others the present authors. In the present work, numerical investigations are performed to illustrate the possibilities of state of the art CFD methods for this problem, including the numerical requirements as time-step and grid resolution. Additionally, the effect of different types of modeling is investigated, ranging from fully turbulent Reynolds-averaged Navier-Stokes (RANS), transitional RANS, to transitional delayed detached-eddy simulation computations. The investigation indicates that detailed information and fair agreement with measurements can be obtained.

Sorensen, N. N.; Schreck, S.

2012-04-01T23:59:59.000Z

436

Analytical determination of performance degradation on a helicopter main rotor due to ice accretion  

E-Print Network [OSTI]

1 ), aerodynami c center (A. C. ) ~ and moment coefficient at zero I iFt (Cm ). These are al 1 derived from mo the previously calculated Fourier coefficients. 26 z ? Plane 1 Figure 10a The Airfoil Plane z ? Plane 2 -S 1 -e r x2 Figure 10b... 1-e where, 'o ' cl'n"0 + 'Z(a"Kp) + c3 + 4 p + C5?anKO + c6? anK + c ? (anK ) 2 2 2 2 2 8?0/e ) + cg(~KO/e ) + clpr + cllt + c12ranKO + t + c ?/r ?/10 ?/10 2 2 2 2 2 15 0 + c15?/t + c17r + cl8t + clg(r?) + c20(tKO) + c (rK ) 22 t 23 0"t + C243...

Camba, Javier

2012-06-07T23:59:59.000Z

437

COE Reductions through Active Aerodynamic Control of Rotor Aerodynamics and Geometry  

SciTech Connect (OSTI)

This study investigates potential cost of energy reductions that might be achieved by designing active systems to mitigate loads throughout the wind turbine system.

Griffin, D. A.; McCoy, T. J.

2008-12-01T23:59:59.000Z

438

Rational design of molecular rotors as beta amyloid binding agents and viscosity sensors  

E-Print Network [OSTI]

out on 0.25 mm Dynamic Adsorbents, Inc. silica gel plates (and applying heat. Dynamic Adsorbents, Inc. silica gel (60,out on 0.25 mm Dynamic Adsorbents, Inc. silica gel plates (

Chang, Willy M.

2011-01-01T23:59:59.000Z

439

Multi-piece wind turbine rotor blades and wind turbines incorporating same  

DOE Patents [OSTI]

A multisection blade for a wind turbine includes a hub extender having a pitch bearing at one end, a skirt or fairing having a hole therethrough and configured to mount over the hub extender, and an outboard section configured to couple to the pitch bearing.

Moroz; Emilian Mieczyslaw (San Diego, CA) [San Diego, CA

2008-06-03T23:59:59.000Z

440

Measurements of unbalance response in a squeeze film damper test rotor-kit  

E-Print Network [OSTI]

for three cases: centered journal, offcentered journal at 30% and 60% of the radial clearance. Different masses of unbalance are used for each case . All the experiments were performed at room temperature and at an oil inlet pressure of 6.9 kPa. The cascade...

Laos, Hector Emilio

1995-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

The effect of adding axial freedom to the blades of a two bladed helicopter rotor  

E-Print Network [OSTI]

n f O C4 31 O CV 2 Jl C Id c3 O Qk z QJ w 2 CL ~ Z 0 O J z 0 lal I- o o X 0 ('&3g), 315NQ 596/ I 32 t 1 I Il A INj &~a tlB5 ~ ?)gal~ 4 Qw44g 98~gAgA II IC / j l 0 3- l f WWMc C cC y-I c-I A ~t ~+~t...'19N Q 99Qg Cl AJ CL Id w & cd 0 IU A UI LU 0 35 Fit. IS TIP BEFLECT)ON Y5 DRAG AOGLE (+I) Posivio~ ~=. r 0 t G ill 4. 4J A-2 4 Za~e hr O- l I PL4TE UNLOGKE b PLATE LOGKEb CoHWO PL A@I LE ( DEGJ 270 DISCUSSIOI OP RESETS...

Oradat, Frank Robert

2012-06-07T23:59:59.000Z

442

Transient processes in an asynchronous induction electronic excited generator with a short cut rotor  

Science Journals Connector (OSTI)

Electronic transients in an induction electronic excited generator during self-excitation and load variation have...

M. L. Kostyrev

2012-04-01T23:59:59.000Z

443

Numerical simulation of geometry effects for concentric-rotor labyrinth seals  

E-Print Network [OSTI]

a single cavity of a seal. Naturally it &could be preferable to include all cayities, h()&i( ver con)put atiousl resource limil at iona preclude this possil&ilit y. Fi ) ur(. . sh()ivs a magnified view of a small i&(l)'1 n)ll ()I & he g)'Icl. sh... a single cavity of a seal. Naturally it &could be preferable to include all cayities, h()&i( ver con)put atiousl resource limil at iona preclude this possil&ilit y. Fi ) ur(. . sh()ivs a magnified view of a small i&(l)'1 n)ll ()I & he g)'Icl. sh...

Ko, Sung-Ho

2012-06-07T23:59:59.000Z

444

Co-Simulation of an Interior Permanent Magnet Synchronous Motor with Segmented Rotor Structure  

E-Print Network [OSTI]

Christoph Schulte and Joachim B¨ocker Power Electronics and Electrical Drives, Paderborn University, D-33095 Paderborn, Germany schulte@lea.upb.de, boecker@lea.upb.de Abstract--Accurate simulation of electric drives, electrical drive, multi-slice approach I. INTRODUCTION Conventionally, a two-step process is being used

Paderborn, Universität

445

Identification of force coefficients in flexible rotor-bearing systems - enhancements and further validations  

E-Print Network [OSTI]

identification of bearing force parameters, i.e. stiffness and damping coefficients, is one of the most difficult to achieve. Field identification by imbalance response measurements is a simple and often reliable way to determine synchronous speed force...

Balantrapu, Achuta Kishore Rama Krishna

2005-11-01T23:59:59.000Z

446

Magnetic Patterning of Permanent-Magnet Rotors for Microscale Motor/Generators  

E-Print Network [OSTI]

offers three advantages. First, eliminating the integrated winding permits simpler MH design element modeling 1. INTRODUCTION High power-density, microscale, axial-flux, PM machines [1-3] typically (Thickness = 0.5 mm, OD=9.5 mm) encased in a Ti adaptor used for microscale power generator [1]; (b

447

Performance of Rotors in a Brushless Doubly-Fed Induction Machine (BDFM)  

E-Print Network [OSTI]

and the output frequency of the inverter. In common with the currently used double-fed induction generator (DFIG the construction of a machine with a rating similar to that of existing DFIGs, see Figure 1. The authors' BDFM uses

Cambridge, University of

448

The effect of imbalance distribution and measurement locations on critical speeds in a turboprop engine rotor  

E-Print Network [OSTI]

The critical speeds of a turbomachine can be defined as the speeds at which synchronous response to imbalance is maximum (Vance,1988). Identifying the proper placement of critical speeds is very important in the design process of turbomachinery...

Marin, Manuel

2012-06-07T23:59:59.000Z

449

Hybrid gas bearings with controlled supply pressure to eliminate rotor vibrations while crossing system critical speeds  

E-Print Network [OSTI]

turbomachinery because of their inherent stability characteristics resulting from no generation of cross- coupled stiffness coefficients [7]. Flexure pivot tilting pad bearings, machined as a single piece using wire EDM (Electrical Discharge Machining) shown... conditions [5]. Gas foil bearings are customarily used in air cycle machines, auxiliary power units, and commercial MTM because of their distinct advantages including tolerance to shaft misalignment and centrifugal/thermal growth, and large load capacity...

Ryu, Keun

2009-05-15T23:59:59.000Z

450

On the characteristics of fault-induced rotor-dynamic bifurcations and nonlinear responses  

E-Print Network [OSTI]

and Poincare map of the response in (a) .........41 3.4 (a) Time history of a nonlinear time-delay model. (b) Corresponding phase portrait and Poincare map of the response in (a) .........42 3.5 Phase portrait and Poincare map of a fractal... reaction forces, which in turn could result in strong nonlinear responses including period-doubling bifurcation, quasi-periodic bifurcation, and even chaotic response [4,5]. Nonlinear dynamical states of quasi-periodic, fractal, and chaotic motions...

Yang, Baozhong

2004-11-15T23:59:59.000Z

451

Numerical study of a rotor/stator interaction case experimentally simulated with an industrial compressor  

E-Print Network [OSTI]

energy efficiency may be achieved by minimizing the clearance between the rotating blade tips- tion of the HR15Y hardness test on abradable material. It was shown that a bilinear plastic law could developments focused on the modeling of abradable coating through mono-dimensional plastic el- ements [10

Paris-Sud XI, Université de

452

Measurements of imbalance response for a rigid rotor fully supported on squeeze film dampers.  

E-Print Network [OSTI]

??Modern high performance turbomachinery providing increased power to weight ratios and larger efficiencies are designed to operate at higher speeds than prior designs. These machines… (more)

Lubell, Daniel Roger

2012-01-01T23:59:59.000Z

453

Imbalance response of a rotor supported on a floating ring fluid film bearing  

E-Print Network [OSTI]

rig model. 5. 14 Rotordynamic damped natural frequency map for nominal clearance configuration (C, =114. 3 pm, C, =165. 1tim). 5. 15 Rotordynamic damped natural frequency map for n- clearance configuration (C, =114. 3 pm, C, =152. 4 lrm) 5. 16...). . . . . . . . . . 7. 16 Peak to peak vibration amplitude versus journal speed. Pressure Page 86 supply 41. 4 kPa (6 psig). nominal clearance configuration (C, =114. 3 lrm and C, =165. 1 lrm). Residual imbalance. Semi-floating bearing. . 88 7. 17 Contour plots...

Naranjo, Julio Enrique

2012-06-07T23:59:59.000Z

454

The effect of teeth-on-stator labyrinth seals on rotor imbalance response  

E-Print Network [OSTI]

difficuhies that necessitated major design changes. These changes included teplacement of the hydrostatic air bearings suppordng the jack shaft with grease lubricated bearings, modification of the seal housing to allow adequate air flow to the seal chamber... the effect on the mtor imbalance response. Tests were performed over a shaft speed range of 0 to 5000 tpm and an air pressure range of 0 to 225 psig at the seal inlet. The fourth objective of this research was to determine the cross-coupled stiffness...

Conway, Eileen Marie

2012-06-07T23:59:59.000Z

455

American Institute of Aeronautics and Astronautics Numerical Solutions for Ultra-Micro Wave Rotors (UWR)  

E-Print Network [OSTI]

) commercial code. Nomenclature A = cross-sectional area Cpair = specific heat for air e = internal energy f = friction coefficient fx = body forces in x-direction air = air specific heat ratio comb = efficiency University of Technology, Warsaw, Poland and Norbert Müller Michigan State University, East Lansing, MI

Müller, Norbert

456

Inlet swirl distortion effects on the generation and propagation of fan rotor shock noise  

E-Print Network [OSTI]

A body-force-based fan model for the prediction of multiple-pure-tone noise generation is developed in this thesis. The model eliminates the need for a full-wheel, three-dimensional unsteady RANS simulation of the fan blade ...

Defoe, Jeff (Jeffrey James)

2011-01-01T23:59:59.000Z

457

UNIVERSITY of CALIFORNIA INVESTIGATION OF HOW ANGLE OF ATTACK AFFECTS ROTOR SPEED  

E-Print Network [OSTI]

.1 Wind Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 Wind Turbines Mathematica Notebook 37 Appendix D Multiview and Assembly Drawings 40 #12;1 1 Introduction 1.1 Wind Power To determine the available power in the wind consider a thin disc of cross- sectional area A and thickness dx

Belanger, David P.

458

Removing the Influence of Rotor Harmonics for Improved Monitoring of Offshore Wind Turbines  

Science Journals Connector (OSTI)

The ability to identify the dynamic properties of offshore wind turbines allows validating and updating numerical tools, which ... of the machine. However, modal identification of turbines in operating conditions...

S. Manzato; C. Devriendt; W. Weijtjens…

2014-01-01T23:59:59.000Z

459

Enertech 2-kW high-reliability wind system. Phase II. Fabrication and testing  

SciTech Connect (OSTI)

A high-reliability wind machine rated for 2 kW in a 9 m/s wind has been developed. Activities are summarized that are centered on the fabrication and testing of prototypes of the wind machine. The test results verified that the wind machine met the power output specification and that the variable-pitch rotor effectively controlled the rotor speed for wind speeds up to 50 mph. Three prototypes of the wind machine were shipped to the Rocky Flats test center in September through November of 1979. Work was also performed to reduce the start-up wind speed. The start-up wind speed to the Enertech facility has been reduced to 4.5 m/s.

Cordes, J A; Johnson, B A

1981-06-01T23:59:59.000Z

460

Gas turbine power plant with supersonic shock compression ramps  

DOE Patents [OSTI]

A gas turbine engine. The engine is based on the use of a gas turbine driven rotor having a compression ramp traveling at a local supersonic inlet velocity (based on the combination of inlet gas velocity and tangential speed of the ramp) which compresses inlet gas against a stationary sidewall. The supersonic compressor efficiently achieves high compression ratios while utilizing a compact, stabilized gasdynamic flow path. Operated at supersonic speeds, the inlet stabilizes an oblique/normal shock system in the gasdynamic flow path formed between the rim of the rotor, the strakes, and a stationary external housing. Part load efficiency is enhanced by use of a lean pre-mix system, a pre-swirl compressor, and a bypass stream to bleed a portion of the gas after passing through the pre-swirl compressor to the combustion gas outlet. Use of a stationary low NOx combustor provides excellent emissions results.

Lawlor, Shawn P. (Bellevue, WA); Novaresi, Mark A. (San Diego, CA); Cornelius, Charles C. (Kirkland, WA)

2008-10-14T23:59:59.000Z

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Supersonic gas compressor  

DOE Patents [OSTI]

A gas compressor based on the use of a driven rotor having a compression ramp traveling at a local supersonic inlet velocity (based on the combination of inlet gas velocity and tangential speed of the ramp) which compresses inlet gas against a stationary sidewall. In using this method to compress inlet gas, the supersonic compressor efficiently achieves high compression ratios while utilizing a compact, stabilized gasdynamic flow path. Operated at supersonic speeds, the inlet stabilizes an oblique/normal shock system in the gasdyanamic flow path formed between the rim of the rotor, the strakes, and a stationary external housing. Part load efficiency is enhanced by the use of a pre-swirl compressor, and using a bypass stream to bleed a portion of the intermediate pressure gas after passing through the pre-swirl compressor back to the inlet of the pre-swirl compressor. Inlet guide vanes to the compression ramp enhance overall efficiency.

Lawlor, Shawn P. (Bellevue, WA); Novaresi, Mark A. (San Diego, CA); Cornelius, Charles C. (Kirkland, WA)

2007-11-13T23:59:59.000Z

462

Image examples of marketing claims to accompany “Smoking Revolution".  A Content Analysis of Electronic Cigarette Retail Websites    

E-Print Network [OSTI]

of Electronic Cigarette Retail Websites W ebsites Americanof Electronic Cigarette Retail Websites American Journal ofon branded e-cigarette retail websites. Methods: Websites

Grana, Rachel A.; Ling, Pamela M.

2014-01-01T23:59:59.000Z

463

A review of "The English Atlantic in an Age of Revolution, 1640-1661." by Carla Gardina Pestana  

E-Print Network [OSTI]

of the seven- teenth century. By emphasizing that the Interregnum government was far more imperially ambitious than that of the early Stuarts, Pestana?s research has important implications for scholars who specialize in the history of either colonial America... the Atlantic. The Navigation Act of 1651 and the campaign launched in 1654 against the Spanish West Indies reflected the imperial ambitions of the English government, which proved itself far more willing to direct colonial affairs than had been Charles I...

Ward, Joseph P.

2006-01-01T23:59:59.000Z

464

A review of "The English Radical Imagination: Culture, Religion, and Revolution, 1630-1660" by Nicholas McDowell.  

E-Print Network [OSTI]

- derestimates the extent to which ?post-revisionist? historians?not least Alasdair Bellany?have begun to reassert the legitimacy of historicising and contextualising such tracts. Nevertheless, he is surely right in claiming that there is much to be learnt about... in order to boast of their ?holy simplicity,? they never- theless blended this with displays of learning which reflected the fact that some of them were demonstrably learned, and even uni- versity educated. As McDowell claims at the outset: ?I show how...

Jason Peacey

2004-01-01T23:59:59.000Z

465

The Homeowner Revolution: Democracy, Land Use and the Los Angeles Slow-Growth Movement, 1965-1992  

E-Print Network [OSTI]

Sustainability Special Reader and Teaching Assistant, Department of Urban Planning Occidental College

Morrow, Gregory D.

2013-01-01T23:59:59.000Z

466

The Homeowner Revolution: Democracy, Land Use and the Los Angeles Slow-Growth Movement, 1965-1992  

E-Print Network [OSTI]

Report, January 1983. “Rocketdyne to Build Two AdditionalMonorail Plan View of Rocketdyne Facility, 1960 1960 LAMTAMonorail Plan Ads for Rocketdyne Jobs, 1950s Map of Key

Morrow, Gregory D.

2013-01-01T23:59:59.000Z

467

Global market integration increases likelihood that a future African Green Revolution could increase crop land use and CO2 emissions  

Science Journals Connector (OSTI)

...short/1403543111 3 of 9 ordinary demand elasticity. Indeed, even if global demand is wholly inelastic, the excess demand response can be elastic if producers in the rest of the world are sufficiently responsive to a price change induced by developments...

Thomas W. Hertel; Navin Ramankutty; Uris Lantz C. Baldos

2014-01-01T23:59:59.000Z

468

Rudwick, M. J. S. 2004. The New Science of Geology. Studies in the Earth Sciences in the Age of Revolution.:  

Science Journals Connector (OSTI)

...established'. Great stuff and a real eye opener to the personalities...surrounded by dense housing estates with their attendant vandalism...Valuing the Resource: the Sustainable Ap-proach', was introduced...in Somerset has remained a sustainable resource despite two centuries...

Douglas Palmer

469

The Homeowner Revolution: Democracy, Land Use and the Los Angeles Slow-Growth Movement, 1965-1992  

E-Print Network [OSTI]

Architecture) ACADEMIC APPOINTMENTS University of California, Los Angeles Fellow, Institute of the Environment & Sustainability

Morrow, Gregory D.

2013-01-01T23:59:59.000Z

470

Mexican Provincial Society during the Age of Revolution: A Social and Economic History of Toluca, 1790-1834  

E-Print Network [OSTI]

Rosaura. Toluca 1603: Vista de ojos. Zinacantepec, México:Rodríguez, Toluca, 1603: vista de ojos (Zinacantepec,in Selected Sources, 1603-1834 .. 205!

Mairot, Mark

2013-01-01T23:59:59.000Z

471

An engineer-oriented optimisation of Stirling engine cycle with finite-size finite-speed of revolution thermodynamics  

Science Journals Connector (OSTI)

Finite-time thermodynamics takes into account exo-irreversibilities which are not managed by reversible thermodynamics, especially reservoir-to-gas temperature gaps. In today's works, thermodynamicists use the working gas mass as the main imposed parameter. In this paper, the study of the Stirling engine cycle is carried out with a motorist-oriented viewpoint: instead of the working gas mass, the reference parameters are those linked to engineering constraints; they are the maximum pressure, the maximum volume, the extreme temperatures and the overall thermal conductance; the adjustable parameters are the volumetric compression ratio, the hot-to-cold conductance ratio and the regenerator efficiency. Analytical normalised expressions of the operating characteristics of the engine, such as power, work, efficiency, speed and their optima are set up. Classical results of analytical optimisation are found back and new ones are established, leading to new conclusions. Some dimensionless and dimensional numbers are put into evidence.

Lavinia Grosu; Pierre Rochelle; Nadia Martaj

2012-01-01T23:59:59.000Z

472

The lost revolution : capitalism, democracy and black citizenship in early twentieth-century America's biggest race conflicts  

E-Print Network [OSTI]

This new racial conflict over the future of blacks' social, political and economic self determination became an inescapable "trial by fire" for American democracy. Throughout the United States, W.E.B. Du Bois' "New Negroes," ...

Butler, Katonio A. (Katonio Arthella)

2007-01-01T23:59:59.000Z

473

History of AUV's Hull shape Typically, hull shape is based on a body of revolution with a rounded bow,  

E-Print Network [OSTI]

for calculating laminar/turbulent boundary layer thickness and for transition prediction. · To study of how and the results of transition point (xtran) and drag cofficient (CDA) at Re = 5�107 picture from Zedan (1978 techniques or the designer's experience. · The computer CFD software simulation is the main design tool

Sóbester, András

474

A rooftop revolution? A multidisciplinary analysis of state-level residential solar programs in New Jersey and Massachusetts  

Science Journals Connector (OSTI)

The success of alternative energy policies is usually measured in terms of energy capacity. By this metric, state-level policies to promote solar installations in New Jersey and Massachusetts have been a success....

Alden B. Griffith; Monica R. Higgins…

2014-06-01T23:59:59.000Z

475

Image examples of marketing claims to accompany “Smoking Revolution".  A Content Analysis of Electronic Cigarette Retail Websites    

E-Print Network [OSTI]

Image examples of marketing claims to accompany “ SmokingImage examples of marketing claims to accompany “Smokingdriven and reinforced by marketing, it is important to

Grana, Rachel A.; Ling, Pamela M.

2014-01-01T23:59:59.000Z

476

The location of two-hand trip devices on full revolution mechanical power presses with regard to operator safety  

E-Print Network [OSTI]

, , Point of operation. Flywheel dl ive and single geared trans- m1 8'-' lo l 12 Accepted safe openings between the bottom edg of. a guard and feed table at various distances from the point of operation. . . . . . . 21 Timing arrangemen't used by Lobl...' cal presses I s I, h(l conversion of rotary motion of a flywheel to rcl i J)F oca. ? ting motion of the pre. , s ram by means of an eccentric. The most common form of eccentricity used on mech;)ni. cal 2 presses is the crankshaf*. Other forms...

Masters, Randall Wayne

2012-06-07T23:59:59.000Z

477

The atmosphere complex... or simple? Spurred on by the revolution in computer technology and a growing focus on  

E-Print Network [OSTI]

in atmospheric science. It is ironic that thanks to his pioneering book "Weather prediction by numerical process" in 1922, Richardson is much better known as the father of numerical weather prediction than? The surprising answer appears to be both: a recent study of the outputs of numerical weather models shows

Lovejoy, Shaun

478

International Class Conflict: A Study of Nicaraguan Domestic Policy and United States Foreign Policy Related to the Counter-Revolution  

E-Print Network [OSTI]

This thesis examines historical events which led to the direct and indirect involvement of United States government and industry resources in attempts to influence the political and economic structures of the Central ...

Fullerton, John Daniel

1997-01-01T23:59:59.000Z

479

F. Willoughby Smith and the development of American policy toward the Bolshevik Revolution, 7 November - 12 December, 1917  

E-Print Network [OSTI]

because of his upbringing he was adamantly opposed to the Bolsheviks and everything for which they stood. His consular dispatches to the Department of State advo- cated taking a strong stance toward the Bolsheviks while, at the same time, financially.... 8; Timothy C. Smith, U. S. consul at Odessa, to Secretary of State Wil liam H. Seward, Odessa, 3 September 1867, Dispatches from U. S. Consul s in Odessa, 1834-1906, M459, DSNAM. 23 and that "the future development of the vast resources...

Hammond, Terry Wayne

1986-01-01T23:59:59.000Z

480

The Laird’s Houses of Scotland: From the Reformation to the Industrial Revolution, 1560–1770   

E-Print Network [OSTI]

The purpose of this research is to define the architectural development of laird’s houses. The term ‘laird’s house’ can imply, simply, ‘the house of a laird’. Architecturally, it is used to describe a category of dwelling ...

Strachan, Sabina Ross

Note: This page contains sample records for the topic "rotor speed-the revolutions" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

(Digital) Revolution Girl Style Now!: Subcultures, Social Media, Subjectivity and the Videos of Sadie Benning and Thirza Cuthand  

E-Print Network [OSTI]

The Riot Grrrl Manifesto,” in Bikini Kill #2, 1992 In theBenning ends with a song by Bikini Kill—arguably the most

Royer, Alice

2012-01-01T23:59:59.000Z

482

Newsletter of the Buckminster Fuller Institute Vol. 15 No. 1 Spring 2002 Keeping a Pulse on the Design Science Revolution  

E-Print Network [OSTI]

, and waste is managed for productivity. A place where the neighbors, young and old, routinely help one potatoes. David Morris, vice president of the Institute for Local Self-Reliance (ILSR), coined the term waste disposal costs, lengthy permit processes and compliance costs. Since agricultural crops

Prigozhin, Leonid

483

Detailed design, fabrication and testing of an engineering prototype compensated pulsed alternator. Final report  

SciTech Connect (OSTI)

The design, fabrication, and test results of a prototype compensated pulsed alternator are discussed. The prototype compulsator is a vertical shaft single phase alternator with a rotating armature and salient pole stator. The machine is designed for low rep rate pulsed duty and is sized to drive a modified 10 cm Beta amplifier. The load consists of sixteen 15 mm x 20 mm x 112 cm long xenon flashlamps connected in parallel. The prototype compulsator generates an open circuit voltage of 6 kV, 180 Hz, at a maximum design speed of 5400 rpm. At maximum speed, the inertial energy stored in the compulsator rotor is 3.4 megajoules.

Bird, W.L. Jr.; Woodson, H.H.

1980-03-01T23:59:59.000Z

484

B3 Mutations and urban renewal | Mutations et renouvellement urbain --371 The contribution of the field of urban ambiance in  

E-Print Network [OSTI]

we have the Industrial Revolution, by the end of the 18 th century, and the scientific-technological revolution known as the Second Industrial Revolution for the dynamic in the expansionism. The scientific-technological revolution brought

Paris-Sud XI, Université de

485

International Conference on Nanoscience and Nanotechnology "Aligarh Nano-IV International 2014"  

E-Print Network [OSTI]

not and cannot miss the nanotechnology revolution as we have missed the industrial revolution , and that he

Nahar, Sultana Nurun

486

An experimental investigation of a swirl gas damper for turbomachinery  

E-Print Network [OSTI]

. Smooth Rotor ?2, Modulus at 2 psi Figure 40. Smooth Rotor ?2, Modulus at 3 psi Figure 41. Smooth Rotor ?2, Modulus at 4 psi Figure 42. Smooth Rotor ?2, Modulus at 5 psi Figure 43. Smooth Rotor ?2, Modulus at 6 psi Figure 44. Smooth Rotor ?2, Modulus.... Knurled Rotor ?3, Modulus at 4 psi Figure 54. Knurled Rotor ?3, Modulus at 5 psi 71 72 73 74 75 Page Figure 55. Knurled Rotor ?3, Modulus at 6 psi Figure 56. Knurled Rotor ?3, Modulus at 7 psi Figure 57. Knurled Rotor ?3, Modulus at 8 psi Figuxe...

Handy, Steven Brent

2012-06-07T23:59:59.000Z

487

Design guidelines for H-Darrieus wind turbines: Optimization of the annual energy yield  

Science Journals Connector (OSTI)

Abstract H-Darrieus wind turbines are gaining popularity in the wind energy market, particularly as they are thought to represent a suitable solution even in unconventional installation areas. To promote the diffusion of this technology, industrial manufacturers are continuously proposing new and appealing exterior solutions, coupled with tempting rated-power offers. The actual operating conditions of a rotor over a year can be, however, very different from the nominal one and strictly dependent on the features of the installation site. Based on these considerations, a turbine optimization oriented to maximize the annual energy yield, instead of the maximum power, is thought to represent a more interesting solution. With this goal in mind, 21,600 test cases of H-Darrieus rotors were compared on the basis of their energy-yield capabilities for different annual wind distributions in terms of average speed. The wind distributions were combined with the predicted performance maps of the rotors obtained with a specifically developed numerical code based on a Blade Element Momentum (BEM) approach. The influence on turbine performance of the cut-in speed was accounted for, as well as the limitations due to structural loads (i.e. maximum rotational speed and maximum wind velocity). The analysis, carried out in terms of dimensionless parameters, highlighted the aerodynamic configurations able to ensure the largest annual energy yield for each wind distribution and set of aerodynamic constraints.

Alessandro Bianchini; Giovanni Ferrara; Lorenzo Ferrari

2015-01-01T23:59:59.000Z

488

Precision electronic speed controller for an alternating-current  

DOE Patents [OSTI]

A high precision controller for an alternating-current multi-phase electrical motor that is subject to a large inertial load. The controller was developed for and is particularly suitable for controlling, in a neutron chopper system, a heavy spinning rotor that must be rotated in phase-locked synchronism with a reference pulse train that is representative of an ac power supply signal having a meandering line frequency. The controller includes a shaft revolution sensor which provides a feedback pulse train representative of the actual speed of the motor. An internal digital timing signal generator provides a reference signal which is compared with the feedback signal in a computing unit to provide a motor control signal. In the preferred embodiment, the motor control signal is a weighted linear sum of a speed error voltage, a phase error voltage, and a drift error voltage, each of which is computed anew with each revolution of the motor shaft. The stator windings of the motor are driven by two amplifiers which are provided with input signals having the proper quadrature relationship by an exciter unit consisting of a voltage controlled oscillator, a binary counter, a pair of readonly memories, and a pair of digital-to-analog converters.

Bolie, Victor W. (Albuquerque, NM)

1988-01-01T23:59:59.000Z

489

Experimental investigation of hinged and spring loaded rolling piston compressors pertaining to a turbo rotary engine  

Science Journals Connector (OSTI)

Hinged rolling piston compressor of a new thermodynamic cycle Pars engine promises high performance figures such as single stage high compression levels and higher volume flow discharge with competitively low input power and torque. The pumping characteristic of the present engine compressor unit has been increased by the implementation of a spring less vane configuration. The reciprocating vane which is usually operated by spring compression in air conditioning and refrigeration unit has been replaced by a hinge vane mechanism. At high speeds, the conventional spring loaded vane which is forced against the eccentrically moving rotor periphery does disconnect and starts rocking. With the new configuration, this mishap has been eliminated and subsequently resulting compressor pressure leaks have been avoided. Compressor experiments have been carried out at predetermined rotor speeds and compressed volume flow amounts and required shaft powers have been measured and derived accordingly. Experimentally determined pressure–volume relations have been compared with isentropic, isothermal, isochoric compressions as well as isobaric process. It is seen that at lower speeds, hinged vane compression is half way between isentropic and isochoric compressions whereas at high speed the compression process approaches further isochoric compression behavior. The isentropic compression efficiency of the hinged vane compressor is around 85% for pressures reaching 9 atm.

Melih Okur; Ibrahim Sinan Akmandor

2011-01-01T23:59:59.000Z

490

Eliciting a human understandable model of ice adhesion strength for rotor blade leading edge materials from uncertain experimental data  

E-Print Network [OSTI]

on the thermal conductivity of isotropic materials that protect the leading edge of the blade from erosion. For this reason, electro-thermal de-icing is not ideal for new high erosion resistant polymer based leading edge protec- tion materials because they have lower thermal conductivity than isotropic materials. Due

Granada, Universidad de

491

DEVELOPMENT OF TIP CLEARANCE FLOW DOWNSTREAM OF A ROTOR BLADE WITH COOLANT INJECTION FROM A TIP TRENCH  

E-Print Network [OSTI]

dimensional picture. The small leakage flow through the tip gap has an effect on the loss and heat transfer it imperative to understand the flow field and heat transfer distribution in the blade tip region. Most studies on the secondary flow. The ultimate objective is to re- duce losses by the introduction of high momentum air

Camci, Cengiz

492

Mach number correlation for a two-dimensional helicopter rotor-blade analysis in the tip region  

E-Print Network [OSTI]

. Comparison of chordwise pressure distributions between TRANDES and flight test (TAAT) results. Flight condition B, P = 90 degrees, radius = 86. 4 percent 16 17 3 c. Comparison of chordwise pressure distributions between TRANDES and flight test (TAAT.... 066 CP/SIG = 0. 008 Figure 3 c. Comparison of chordwise TRANDES and flight test 90 degrees, radius AZIMUTH = 90. 0 / RADIUS = 91. 0 MRCH NQ. (QRTRHAPI = 0. 813 CN = 0. 104 RLP(TRRNDESI = 0. 414 pressure distributions between (TAAT) results...

Schillings, John Joseph

1983-01-01T23:59:59.000Z

493

Measured and Predicted Rotor-Pad Transfer Functions for a Rocker-Pivot Tilting-Pad Journal Bearing  

E-Print Network [OSTI]

Many researchers have compared predicted stiffness and damping coefficients for tilting-pad journal bearings (TPJBs) to measurements. Most have found that direct damping is consistently overpredicted. The thrust of this research is to explain...

Wilkes, Jason Christopher

2012-02-14T23:59:59.000Z

494

Compressibility effects on rotor forces in the leakage path between a shrouded pump impeller and its housing  

E-Print Network [OSTI]

. Radial displacement perturbations were used to solve for radial and circumferential force coefficients. In addition, impeller-discharge pressure disturbances were used to obtain pressure oscillation responses due to precessing impeller pressure wave... oscillation was shown to occur at the wearing ring seal. Introduction of impeller discharge disturbances with n = 11 diametral nodes showed that maximum peak pressure oscillations occurred at nondimensional precession frequencies (f = Q(ai where co...

Cao, Nhai The

1993-01-01T23:59:59.000Z

495

A Study of the Causes of the Service Fracture of Turbine Rotor Blade of Compressor Station Gas-Turbine Unit  

Science Journals Connector (OSTI)

On the basis of structural and fractographic the analysis of the fractured surface of working turbine blade of GTK-10-2 gas-turbine unit of compressor station it is established...

A. Ya. Krasovs’kyi; O. E. Gopkalo; I. O. Makovets’ka; O. O. Yanko

2013-07-01T23:59:59.000Z

496

Influence of Rotor Structure and Number of Phases on Torque and Flux Weakening Characteristics of V-shape Interior PM  

E-Print Network [OSTI]

motor (PM) is one of the most attractive motors applied in compact electric propulsion system, due to its high efficiency, high reliability, and power density. The interior permanent magnet motor (IPM of V-shape Interior PM Electrical Machine Bassel Aslan, Julien Korecki, Thimoté Vigier, Eric Semail

Paris-Sud XI, Université de

497

A simple rotor current observer with an arbitrary rate of convergence for the Brushless Doubly-Fed  

E-Print Network [OSTI]

. These advantages are realised through a reduced capital installation cost, due to a frac- tional inverter power drive (VSD), and as a generator where the prime mover speed can be variable, such as in a wind turbine requirement (as compared to that for an induction machine VSD (or generator)), and further, the advantages

Cambridge, University of

498

IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 25, NO. 4, APRIL 2010 907 Rotor Position Feedback Over an RF Link  

E-Print Network [OSTI]

feedback control. The wireless scheme pre- cludes the need for the cable that feeds the position from the performance of the motor control system. As such, the feedback cable is shielded and the signals are provided in differential form, which increases the sensing cost. Therefore, motor-drive manufacturers have been focusing

Mazumder, Sudip K.

499

Numerical-experimental comparison in the simulation of rotor/stator interaction through blade-tip/abradable coating contact  

E-Print Network [OSTI]

-Cramayel, France Abstract Higher aircraft energy efficiency may be achieved by minimizing the clearance be- tween K plastic modulus T,int interaction rotational period Structural Dynamics & Vibration Laboratory 1

Paris-Sud XI, Université de

500

Two rotary motors in F-ATP synthase are elastically coupled by a flexible rotor and a stiff stator stalk  

Science Journals Connector (OSTI)

...Biology, University of Florida, Gainesville, FL...ATP, the universal fuel of the cell, from...kJ/mol elastic energy to smooth the cooperation...The rotation rate was 0.107 rev/s...at a given frame rate, are averaged over...system, the frame rate was 25 s-1...

André Wächter; Yumin Bi; Stanley D. Dunn; Brian D. Cain; Hendrik Sielaff; Frank Wintermann; Siegfried Engelbrecht; Wolfgang Junge

2011-01-01T23:59:59.000Z