Acoustic Signature from Flames as a Combustion Diagnostic Tool
Final technical rept. 1 May 1979-31 Oct 1983
GEORGIA INST OF TECH ATLANTA SCHOOL OF AEROSPACE ENGINEERING
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A program was conducted to investigate the feasibility of using the combustion noise acoustic output as a non-intrusive diagnostic of some details of the combustion process. Investigated were an open premixed turbulent jet flame and a gas turbine combustor converted to run on propane. The analysis links the acoustic pressure fluctuations to the distribution of heat release rate fluctuations. Measurement of the sound field, yields in principle, the heat release rate fluctuation field. It was found, however, that the analytical methods for this inverse problem are too sensitive to small experimental uncertainties. Consequently, it appears that the method is not, in general feasible.
- Test Facilities, Equipment and Methods
- Combustion and Ignition
- Jet and Gas Turbine Engines