Abstract
This paper presents an experimental study of passive control of shock wave/turbulent boundarylayer interaction induced by a step placed on the floor of a wind tunnel. The experiments were carried out in a 8×10cm2 supersonic wind tunnel, at a free-stream Mach number of 1.98. The basic model was equipped with an interchangeable insert in the shock region to allow measurements with varying geometrical parameters. The following factors influencing the passive control of shock-boundary layer interaction (PCSB) were studied : 1) area of the porous region, 2) porosity, and 3) type of porous surface. Surface static pressure measurements as well as Schlieren observations of the flow field were obtained. It was found that the mean cavity pressure is equal to the mean surface pressure and the effect of the porosity is much larger than the effect of the hole diameter. Furthermore, the forward-facing inclined holes is more effective than the backward-facing inclined holes.
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