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PLIF measurements of combustion dynamics in a burner under forced oscillatory conditions

Pun, W. and Palm, S. L. and Culick, F. E. C. (2000) PLIF measurements of combustion dynamics in a burner under forced oscillatory conditions. AIAA Papers, AIAA-2000-3123. American Institute of Aeronautics and Astronautics . http://resolver.caltech.edu/CaltechAUTHORS:20101115-074125126

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Abstract

A technique has been devised which can provide insight into the local dynamic response of a flame to an acoustic field. In the experiments, a test chamber is acoustically excited by a pair of low frequency drivers. The response of the flame is visualized by planar laser-induced fluorescence (PLIF) of the hydroxyl (OH) radical, which is a good indicator for heat release in the flame. The resulting images are phase-locked and averaged to yield a qualitative picture of the fluctuation of the heat release. This is correlated with a pressure transducer near the flame, which allows stability to be evaluated using Rayleigh's criterion. Results indicate that the drive frequency and burner configuration have a pronounced effect on the response of the flame. Drive frequencies ranging from 22 Hz to 55 Hz are applied to the jet mixed burner, supplied with a premixed 50/50 mixture of methane and carbon dioxide at a Reynolds number of 20,000. The burner is operated in two configurations; with an aerodynamically stabilized flame, and with a flame stabilized by two protruding bluff-bodies. Results indicate that in general, the bluff-body stabilized flame is less sensitive to chamber acoustic excitation


Item Type:Report or Paper (Report)
Additional Information:© 2000 by the California Institute of Technology. The authors are especially indebted to Professor Chris Cadou (University of Maryland) for his very considerable advice and help during the initial stages of designing the PLIF apparatus, when he was a Post Doctoral Scholar at Caltech. We also thank Mr. Konstantin Matveev for his help in completing this paper and Cerwin-Vega for their generous donation of the acoustic drivers. This work was sponsored partly by the California Institute of Technology; partly by a grant under the Defense University Research Instrumentation Program, provided by the Air Force Office of Scientific Research; partly by the Department of Energy, AGTSR Program; and partly by ENEL.
Group:Guggenheim Jet Propulsion Center
Funders:
Funding AgencyGrant Number
California Institute of TechnologyUNSPECIFIED
Defense University Research Instrumentation Program/Air Force Office of Scientific ResearchUNSPECIFIED
Department of EnergyUNSPECIFIED
AGTSR ProgramUNSPECIFIED
Ente Nazionale l'Energia Elettrica (ENEL)UNSPECIFIED
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Guggenheim Jet Propulsion CenterUNSPECIFIED
AIAA2000-3123
Record Number:CaltechAUTHORS:20101115-074125126
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20101115-074125126
Official Citation:Pun, W., California Inst. of Technology, Pasadena; Palm, S. L., California Inst. of Technology, Pasadena; Culick, F. E. C., California Inst. of Technology, Pasadena AIAA-2000-3123 AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, 36th, Huntsville, AL, July 16-19, 2000
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:20790
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:07 Dec 2010 00:29
Last Modified:26 Dec 2012 12:38

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