Abstract
The instantaneous surface-pressure distributions on two-dimensional rectangular cylinders of varying length to ratio, in a smooth uniform flow and in a homogeneous turbulent flow, have been measured and the effects of the free-stream turbulence have been investigated by analyzing such as quantities as the power and co-spectra and the spanwise correlations of the simultaneously measured pressure distributions. When the length to width ratio is small so that the separated flow does not reattach on the side wall, the pressure fluctuations on front surface is influenced by the vortex shedding whether or not there is turbulence in the free stream. When this ratio is larger and the flow reattach, the front-surface pressure does not show periodicity but a negative peak appears on the side wall periodically and propagates downstream.
