Influence of Shape on Vortex Shedding from Two-Dimensional Cylinders at High Reynolds Number and High Subsonic Mach Number

摘要

The influence of shape on vortex shedding from two-dimensional cylinders at high Reynolds number and high subsonic Mach number was studied in wind tunnel tests. It is found that the overall scale of the formation region, which is the region just behind a body enclosed by the upper and lower separating shear layers, governs the vortex shedding phenomena. As the scale of the formation region increases, the amplitude and shape of the pressure become larger and more regular, respectively, and the amplitude of the pressure spectra at the fundamental frequency becomes larger, but the fundamental frequency (or vortex shedding frequency) itself decreases.