FLUCTUATING PRESSURES ON TWO-DIMENSIONAL RECTANGULAR PRISMS

Abstract

Aerodynamic characteristics acting on rectangular prisms remarkably vary with the side ratio of the prisms. The variation of wind forces with the side ratio was caused by the aerodynamic interaction between the separated shear layer and the after-body of the prism. Especially, the re-attachment of the separated shear layer on the after-body of the prism yields the remarkable variation of wind forces. In order to investigate wind forces on several rectangular prisms, a wind tunnel experiment was carried out by the simultaneous multipressure measurement in a smooth flow. In this paper, the variation of pressure distributions and the resulting wind forces on rectangular prisms with various side ratios are discussed.