The Effects of Pressure and an Acoustic Field on a Cryogenic Coaxial Jet
ENGINEERING RESEARCH AND CONSULTING INC (ERC INC) EDWARDS AFB CA
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OBJECTIVES Document the nature of the acoustic wavecoaxial-jet injector interaction Map a range of input variables Explore application of the data and the findings for rocket combustion instability. MOTIVATION Combustion instability has always been one of the most complex phenomena in liquid rocket engines High amplitude and high frequency acoustic instabilities screaming, can lead to local burnout of the combustion chamber walls and injector plates APPROACH Using the AFRL supercritical facility Span sub and supercritical pressures Cryogenic temperatures Acoustic Field. A coaxial injector design based on the single-jet cryogenic injector used in all previous studies well characterized A specially-designed acoustic driver Single-shot shadowgraph.