A time-resolved particle image velocimetry investigation of a cavity flow with a thick incoming turbulent boundary layer
作者： C. Haigermoser , L. Vesely , M. Novara , M. Onorato
DOI: 10.1063/1.2990043
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摘要: The present paper aims for a better understanding of the flow in rectangular cavity at very low Mach number and with thick incoming turbulent boundary layer. In experiment layer is defined as because ratio length to momentum thickness Θ (L/Θ=18) respect claimed threshold (L/Θ>80) self-sustained oscillations take place. Time-resolved particle image velocimetry (PIV) measurements were taken planes normal parallel wall over having aspect L/H=4, ReΘ=1041. PIV data analyzed give mean characteristics time behavior flow. irregular vortex shedding observed shear was interpreted reference coherent structures unsteady load on walls consequent oscillating drag forces studied by analyzing instant flux across mouth. A frequency mo...
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