The flow around long rectangular plates can be modified by acoustic forcing. The leading-edge vortex shedding is locked to the sound frequency over a broad range of flow velocities. Close to a critical acoustic Strouhal number, significant drops in the mean base pressure coefficient may occur, depending on the plate chord. It is hypothesised that the plate chord changes the position in the acoustic phase at which the leading-edge vortices arrive at the trailing edge. Interference with the trailing-edge vortex shedding may then be responsible for the significant variation in mean base pressure coefficient. This situation is not observed for flows around plates with no leading-edge shedding.
|Number of pages||8|
|Journal||Journal of Wind Engineering and Industrial Aerodynamics|
|Publication status||Published - 1 Jan 1993|