Analytic analysis of load alignment for coning extreme‐scale rotors

doi:10.1002/we.2435

This content will become publicly available on November 3, 2020

Title: Analytic analysis of load alignment for coning extreme‐scale rotors

Authors:

^[1]; Qin, Chao ^[1]; Loth, Eric ^[1]

Department of Mechanical and Aerospace EngineeringUniversity of Virginia Charlottesville Virginia

Publication Date:: 2019-11-03

Sponsoring Org.:: USDOE Advanced Research Projects Agency - Energy (ARPA-E)

OSTI Identifier:: 1573064

Grant/Contract Number:: DE‐AR0000667

Resource Type:: Publisher's Accepted Manuscript

Journal Name:: Wind Energy

Additional Journal Information:: Journal Name: Wind Energy; Journal ID: ISSN 1095-4244

Publisher:: Wiley Blackwell (John Wiley & Sons)

Country of Publication:: United Kingdom

Language:: English

Citation Formats


                    Noyes, Carlos, Qin, Chao, and Loth, Eric. Analytic analysis of load alignment for coning extreme‐scale rotors.  United Kingdom: N. p., 2019. 
        Web.  doi:10.1002/we.2435.

Copy to clipboard


                    Noyes, Carlos, Qin, Chao, & Loth, Eric. Analytic analysis of load alignment for coning extreme‐scale rotors.  United Kingdom.  doi:10.1002/we.2435.

Copy to clipboard


                    Noyes, Carlos, Qin, Chao, and Loth, Eric. Sun .  
        "Analytic analysis of load alignment for coning extreme‐scale rotors".  United Kingdom.  doi:10.1002/we.2435.

Copy to clipboard


                    
@article{osti_1573064,

  title        = {Analytic analysis of load alignment for coning extreme‐scale rotors},

  author       = {Noyes, Carlos and Qin, Chao and Loth, Eric},

  abstractNote = {},

  doi          = {10.1002/we.2435},

  journal      = {Wind Energy},

  number       = ,

  volume       = ,

  place        = {United Kingdom},

  year         = {2019},

  month        = {11}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

This content will become publicly available on November 3, 2020

Publisher's Version of Record

DOI: 10.1002/we.2435

Other availability

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record:

Re-examining the precepts of the blade element momentum theory for coning rotors
journal, January 2006

Crawford, Curran
Wind Energy, Vol. 9, Issue 5
DOI: 10.1002/we.197

A morphing downwind-aligned rotor concept based on a 13-MW wind turbine: A morphing downwind-aligned wind turbine rotor concept
journal, May 2015

Ichter, Brian; Steele, Adam; Loth, Eric
Wind Energy, Vol. 19, Issue 4
DOI: 10.1002/we.1855

Smart fatigue load control on the large-scale wind turbine blades using different sensing signals
journal, March 2016

Zhang, Mingming; Tan, Bin; Xu, Jianzhong
Renewable Energy, Vol. 87
DOI: 10.1016/j.renene.2015.10.011

Integrated design of downwind land-based wind turbines using analytic gradients: Downwind wind turbines
journal, February 2016

Ning, Andrew; Petch, Derek
Wind Energy, Vol. 19, Issue 12
DOI: 10.1002/we.1972

Pre-aligned downwind rotor for a 13.2 MW wind turbine
journal, February 2018

Noyes, Carlos; Qin, Chao; Loth, Eric
Renewable Energy, Vol. 116
DOI: 10.1016/j.renene.2017.10.019

Downwind pre-aligned rotors for extreme-scale wind turbines: Downwind pre-aligned rotors for extreme-scale wind turbines
journal, January 2017

Loth, Eric; Steele, Adam; Qin, Chao
Wind Energy
DOI: 10.1002/we.2092

Modelling and analysis of the flow field around a coned rotor: Flow Field around a Coned Rotor
journal, July 2001

Mikkelsen, R.; Sørensen, J. N.; Shen, W. Z.
Wind Energy, Vol. 4, Issue 3
DOI: 10.1002/we.50

The simultaneous effect of a fairing tower and increased blade flexibility on a downwind mounted rotor
journal, May 2013

Reiso, M.; Muskulus, M.
Journal of Renewable and Sustainable Energy, Vol. 5, Issue 3
DOI: 10.1063/1.4803749

Models used for the simulation and control of a segmented ultralight morphing rotor
journal, July 2017

Zalkind, Daniel S.; Pao, Lucy Y.; Martin, Dana P.
IFAC-PapersOnLine, Vol. 50, Issue 1
DOI: 10.1016/j.ifacol.2017.08.377

Fatigue loads for wind turbines operating in wakes
journal, March 1999

Thomsen, Kenneth; Sørensen, Poul
Journal of Wind Engineering and Industrial Aerodynamics, Vol. 80, Issue 1-2
DOI: 10.1016/S0167-6105(98)00194-9

Similar records in OSTI.GOV collections:

Morphing Downwind-Aligned Rotor Concept Based on a 13-MW Wind Turbine

Journal Article Ichter, Brian ; Steele, Adam ; Loth, Eric ; ... - Wind Energy (Chichester, England)

To alleviate the mass-scaling issues associated with conventional upwind rotors of extreme-scale wind turbines (>/=10 MW), a morphing downwind-aligned rotor (MoDaR) concept is proposed herein. The concept employs a downwind rotor with blades whose elements are stiff (no intentional flexibility) but with hub-joints that can be unlocked to allow for moment-free downwind alignment. Aligning the combination of gravitational, centrifugal and thrust forces along the blade path reduces downwind cantilever loads, resulting in primarily tensile loading. For control simplicity, the blade curvature can be fixed with a single morphing degree of freedom using a near-hub joint for coning angle: 22 degreesmore »« less
DOI: 10.1002/we.1855
Segmented Ultralight Pre-Aligned Rotor for Extreme-Scale Wind Turbines

Conference Loth, E. ; Steele, A. ; Ichter, B. ; ...

To alleviate the mass-scaling issues associated with conventional upwind rotors of extreme-scale turbines, a downwind rotor concept is proposed which employs fixed blade curvature based on force alignment at rated conditions. For a given peak stress constraint, the reduction in downwind cantilever loads allows reduced shell and spar thickness, and thus a reduced blade mass as compared with a conventional upwind rotor, especially as rotor sizes approach extreme-scales. To quantify this mass reduction, a Finite Element Analysis was conducted for a 10 MW rated rotor based on the NREL offshore 5 MW baseline wind turbine. The results show that thismore »« less
Downwind pre-aligned rotors for extreme-scale wind turbines

Journal Article Loth, Eric ; Steele, Adam ; Qin, Chao ; ... - Wind Energy

Downwind force angles are small for current turbines systems (1-5 MW) such that they may be readily accommodated by conventional upwind configurations. However, analysis indicates that extreme-scale systems (10-20 MW) will have larger angles that may benefit from downwind-aligned configurations. To examine potential rotor mass reduction, the pre-alignment concept was investigated a two-bladed configuration by keeping the structural and aerodynamic characteristics of each blade fixed (to avoids a complete blade re-design). Simulations for a 13.2 MW rated rotor at steady-state conditions show that this concept-level two-bladed design may yield 25% rotor mass savings while also reducing average blade stress overmore »« less
Cited by 4
DOI: 10.1002/we.2092

Full Text Available
SEACC: the systems engineering and analysis computer code for small wind systems

Technical Report Tu, P.K.C. ; Kertesz, V.

The systems engineering and analysis (SEA) computer program (code) evaluates complete horizontal-axis SWECS performance. Rotor power output as a function of wind speed and energy production at various wind regions are predicted by the code. Efficiencies of components such as gearbox, electric generators, rectifiers, electronic inverters, and batteries can be included in the evaluation process to reflect the complete system performance. Parametric studies can be carried out for blade design characteristics such as airfoil series, taper rate, twist degrees and pitch setting; and for geometry such as rotor radius, hub radius, number of blades, coning angle, rotor rpm, etc. Designmore »« less
DOI: 10.2172/5703427

Full Text Available
The QCD running coupling

Journal Article Deur, Alexandre ; Brodsky, Stanley J. ; de Téramond, Guy F. - Progress in Particle and Nuclear Physics

Here, we review present knowledge onmore »« less
Cited by 28
DOI: 10.1016/j.ppnp.2016.04.003

Full Text Available

Similar Records

This content will become publicly available on November 3, 2020

Title: Analytic analysis of load alignment for coning extreme‐scale rotors

Citation Formats

Re-examining the precepts of the blade element momentum theory for coning rotors journal, January 2006

A morphing downwind-aligned rotor concept based on a 13-MW wind turbine: A morphing downwind-aligned wind turbine rotor concept journal, May 2015

Smart fatigue load control on the large-scale wind turbine blades using different sensing signals journal, March 2016

Integrated design of downwind land-based wind turbines using analytic gradients: Downwind wind turbines journal, February 2016

Pre-aligned downwind rotor for a 13.2 MW wind turbine journal, February 2018

Downwind pre-aligned rotors for extreme-scale wind turbines: Downwind pre-aligned rotors for extreme-scale wind turbines journal, January 2017

Modelling and analysis of the flow field around a coned rotor: Flow Field around a Coned Rotor journal, July 2001

The simultaneous effect of a fairing tower and increased blade flexibility on a downwind mounted rotor journal, May 2013

Models used for the simulation and control of a segmented ultralight morphing rotor journal, July 2017

Fatigue loads for wind turbines operating in wakes journal, March 1999

Re-examining the precepts of the blade element momentum theory for coning rotors
journal, January 2006

A morphing downwind-aligned rotor concept based on a 13-MW wind turbine: A morphing downwind-aligned wind turbine rotor concept
journal, May 2015

Smart fatigue load control on the large-scale wind turbine blades using different sensing signals
journal, March 2016

Integrated design of downwind land-based wind turbines using analytic gradients: Downwind wind turbines
journal, February 2016

Pre-aligned downwind rotor for a 13.2 MW wind turbine
journal, February 2018

Downwind pre-aligned rotors for extreme-scale wind turbines: Downwind pre-aligned rotors for extreme-scale wind turbines
journal, January 2017

Modelling and analysis of the flow field around a coned rotor: Flow Field around a Coned Rotor
journal, July 2001

The simultaneous effect of a fairing tower and increased blade flexibility on a downwind mounted rotor
journal, May 2013

Models used for the simulation and control of a segmented ultralight morphing rotor
journal, July 2017

Fatigue loads for wind turbines operating in wakes
journal, March 1999