Contributions of turbulence to subsonic cavity flow wall pressures
作者： Nathan Murray , Richard Raspet , Lawrence Ukeiley
DOI: 10.1063/1.3540682
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摘要: Poisson-type pressure sources in the flow over open cavities were examined for several subsonic free stream conditions. Wall-mounted transducers and two-component particle image velocimetry (PIV) employed synchronously to obtain data at Mach 0.19, 0.29, 0.39, 0.58, 0.73 a rectangular cavity with length-to-depth ratio of 6. The modified quadratic stochastic estimation was used yield time-resolved, low-dimensional representation velocity field using PIV measurements. A conformal transformation applied geometry allow integration Poisson’s equation giving time-resolved estimate surface fluctuations. use allowed contribution mean-shear nonlinear loads be evaluated independently, showing that resonant features (Rossiter modes) are dominant interactions become...
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