We present an experimental study of acoustic oscillations induced by an internal airflow over a shallow and a deep cavity. The Kelvin-Helmholtz instability is interacting with an acoustic mode of the cavity or of the duct, leading to a resonance which produces a very high sound level. The influence of upstream boundary layer thickness and neck thickness is studied. Some results obtained by modifying the upstream lip shape, by crenel addition, are also given.
An Experimental Study of the Acoustic Oscillations by Flows Over Cavities
Contributed by the Technical Committee on Vibration and Sound for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received July 2002; Revised November 2003. Associate Editor: Keltie.
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Amandole`se, X., He´mon, P., and Regardin, C. (May 4, 2004). "An Experimental Study of the Acoustic Oscillations by Flows Over Cavities ." ASME. J. Vib. Acoust. April 2004; 126(2): 190–195. https://doi.org/10.1115/1.1688761
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