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Title: Combustion instability modeling and analysis

It is well known that the two key elements for achieving low emissions and high performance in a gas turbine combustor are to simultaneously establish (1) a lean combustion zone for maintaining low NO{sub x} emissions and (2) rapid mixing for good ignition and flame stability. However, these requirements, when coupled with the short combustor lengths used to limit the residence time for NO formation typical of advanced gas turbine combustors, can lead to problems regarding unburned hydrocarbons (UHC) and carbon monoxide (CO) emissions, as well as the occurrence of combustion instabilities. The concurrent development of suitable analytical and numerical models that are validated with experimental studies is important for achieving this objective. A major benefit of the present research will be to provide for the first time an experimentally verified model of emissions and performance of gas turbine combustors. The present study represents a coordinated effort between industry, government and academia to investigate gas turbine combustion dynamics. Specific study areas include development of advanced diagnostics, definition of controlling phenomena, advancement of analytical and numerical modeling capabilities, and assessment of the current status of our ability to apply these tools to practical gas turbine combustors. The present work involves fourmore » tasks which address, respectively, (1) the development of a fiber-optic probe for fuel-air ratio measurements, (2) the study of combustion instability using laser-based diagnostics in a high pressure, high temperature flow reactor, (3) the development of analytical and numerical modeling capabilities for describing combustion instability which will be validated against experimental data, and (4) the preparation of a literature survey and establishment of a data base on practical experience with combustion instability.« less
Authors:
; ;  [1] ;  [2]
  1. Pennsylvania State Univ., University Park, PA (United States)
  2. Tuskeggee Univ., Tuskegee, AL (United States). Dept. of Aerospace Engineering
Publication Date:
OSTI Identifier:
219507
Report Number(s):
DOE/MC/29061--96/C0677; CONF-9510109--32
ON: DE96008911; TRN: 96:002610
DOE Contract Number:
FC21-92MC29061
Resource Type:
Conference
Resource Relation:
Conference: Advanced turbine systems (ATS) annual review, Morgantown, WV (United States), 17-18 Oct 1995; Other Information: PBD: 1995
Research Org:
Clemson Univ., SC (United States)
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; 99 MATHEMATICS, COMPUTERS, INFORMATION SCIENCE, MANAGEMENT, LAW, MISCELLANEOUS; 20 FOSSIL-FUELED POWER PLANTS; FUEL-AIR RATIO; MEASURING METHODS; COMBUSTION INSTABILITY; CARBON MONOXIDE; IGNITION; MIXING; GAS TURBINES; NITROGEN OXIDES; FIBER OPTICS; MATHEMATICAL MODELS