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Non-Intrusive Laser-Induced Imaging for Speciation and Patternation in High Pressure Gas Turbine CombustorsThe next generation of was turbine combustors for aerospace applications will be required to meet increasingly stringent constraints on fuel efficiency, noise abatement, and emissions. The power plants being designed to meet these constraints will operate at extreme conditions of temperature and pressure, thereby generating unique challenges to the previously employed diagnostic methodologies. Current efforts at NASA Glenn Research Center (GRC) utilize optically accessible, high pressure flametubes and sector combustor rigs to probe, via advanced nonintrusive laser techniques, the complex flowfields encountered in advanced combustor designs. The fuel-air mixing process is of particular concern for lowering NO(x) emissions generated in lean, premixed engine concepts. Using planar laser-induced fluorescence (PLIF) we have obtained real-time, detailed imaging of the fuel spray distribution for a number of fuel injector over a wide range of operational conditions that closely match those expected in the proposed propulsion systems. Using a novel combination of planar imaging, of fuel fluorescence and computational analysis that allows an examination of the flowfield from any perspective, we have produced spatially and temporally resolved fuel-air distribution maps. These maps provide detailed insight into the fuel injection at actual conditions never before possible, thereby greatly enhancing the evaluation of fuel injector performance and combustion phenomena.
Document ID
Acquisition Source
Glenn Research Center
Document Type
Reprint (Version printed in journal)
Locke, Randy J.
(DYNACS Engineering Co., Inc. Brook Park, OH United States)
Zaller, Michelle M.
(NASA Glenn Research Center Cleveland, OH United States)
Hicks, Yolanda R.
(NASA Glenn Research Center Cleveland, OH United States)
Anderson, Robert C.
(NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
September 6, 2013
Publication Date
September 1, 1999
Subject Category
Instrumentation And Photography
Report/Patent Number
NAS 1.15:209395
Meeting Information
Meeting: Optical Diagnostics for Fluids, Heat, Combustion, and Photomechanics of Solids
Location: Denver, CO
Country: United States
Start Date: July 18, 1999
End Date: July 23, 1999
Sponsors: International Society for Optical Engineering
Funding Number(s)
PROJECT: RTOP 537-05-20
PROJECT: RTOP 538-17-10
Distribution Limits
Work of the US Gov. Public Use Permitted.
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