Two-Dimensional Normal Fences on a Flat Plate

摘要

As a first step towards understanding the mechanism of action of spoilers, two-dimensional normal fences on an effectively infinite flat plate in incompressible flow were studied experimentally. The pressure distribution on the plate upstream of a fence was found to he a function of δ*/h , where δ* is the boundary layer displacement thickness measured at the fence position, in the absence of the fence, and h is the fence height.nDownstream, the pressure distribution in the separated region was a function of non-dimensional distance from the fence and the reattachment distance was proportional to h. Downstream of reattachment a dependence onδ*/h was once again apparent.