Author(s)

P.J. Disimile & N. Toy

Abstract

The acoustics associated with a long rectangular cavity of constant cross-section immersed in a thick boundary layer P.J. ~isimile' & N. TO^ 1 Department of Aerospace Eng., University of Cincinnati, Cincinnati, USA 2 School of Engineering, University of Surrey, UK Abstract The flows over cavities are of interest in many different areas of engineering from thermal equipment to engines and machinery and can be found in landinggear wells, surface-mounted instrumentation on aircraft, cut-outs on marine vehicles, printed circuit boards and land vehicles. The very nature of these flows can cause large changes in pressure, velocity, and density fluctuations as well as generate strong propagating acoustic waves. These are typical cavity applications where reductions in pressure fluctuation levels, heat transfer, vibration, noise, and structural fatigue are still of considerable interest. This experimental study was undertaken to examine the effect of cavity length on flow oscillations produced by an

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