An Interferometric Study on Vortex Shedding from Trapezoidal Prisms in Transonic Flow
An interferometric study has been performed to examine the influence of shape on vortex shedding from quasi-twodimensional prisms at high Reynolds number and high subsonic Mach number. It is found that overall scale of the vortex formation region, which is the space just behind a prism enclosed by the upper and lower separating shear layers, governs the vortex shedding phenomena: As scale of the vortex formation region increases, amplitude and way of the pressure variation with time become larger and more regular respectively, and the pressure spectrum at the fundamental frequency becomes larger, but the fundamental frequency itself decreases.
KeywordsTest Section High Reynolds Number Bluff Body Transonic Flow Array Processor
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