Experimental study on acoustic phenomena of supersonic jet impinging on inclined flat plate

M Akamine, Y Nakanishi, K Okamoto… - 52nd Aerospace …, 2014 - arc.aiaa.org
M Akamine, Y Nakanishi, K Okamoto, S Teramoto, T Okunuki, S Tsutsumi
52nd Aerospace Sciences Meeting, 2014arc.aiaa.org
Acoustic and flow fields of a Mj= 1.8 correctly-expanded jet impinging on a 45○ inclined flat
plate are investigated experimentally. In the experiments, microphone measurement,
Schlieren visualization, and wall static pressure measurement on the inclined plate surface
are conducted for different nozzle-plate distances. When the nozzle-plate distance is 5D, two
types of acoustic waves, whose characteristics are different in propagation directions,
spectra, and source locations, are observed. One propagates in the 30○ direction from the …
Acoustic and flow fields of a Mj= 1.8 correctly-expanded jet impinging on a 45○ inclined flat plate are investigated experimentally. In the experiments, microphone measurement, Schlieren visualization, and wall static pressure measurement on the inclined plate surface are conducted for different nozzle-plate distances. When the nozzle-plate distance is 5D, two types of acoustic waves, whose characteristics are different in propagation directions, spectra, and source locations, are observed. One propagates in the 30○ direction from the inclined plate surface, and the other propagates in the 75○ direction. When the nozzleplate distance is varied, the change of the intensities of those two types of acoustic waves is observed, and the correlation between the acoustic waves and the shock structures of the flow field is discussed.
AIAA Aerospace Research Center
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