Spectral analysis of high-speed flow at combustion of preliminary unprepared fuel-air mixture
Goldfeld M. A.
1
1Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Email: gold@itam.nsc.ru
The results of the study of spectral characteristics of high-speed flow under conditions of autoignition of priliminary unprepared fuel-air mixture with intensive interaction of external acoustics and combustion are presented. As a result of thermoacoustic interaction, the power of pulsations increases by an order of magnitude or more compared to the case of "cold" flow, as a result of which mixing improves, combustion intensifies and heat release increases. At high levels of heat release, flow instability and the probability of transition to vibrational combustion occur. Keywords: supersonic flow, combustion, pressure pulsations, spectrum. Keywords: supersonic flow, combustion, pressure pulsations, spectrum.
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