Flow around Perforated Plate Placed Perpendicularly on Ground Plane

This paper describes the flow past a two-dimensional perforated plate placed on a ground plane. The experiment was carried out in the 20cm × 20cm circuit-type wind-tunnel having the working section of 2m length at Reynolds number of 1.32 × 104. The time mean velocity and turbulence intensity in the flow field behind the perforated plate were measured by use of laser Doppler velocimeter. The results were discussed for the various values of porosity in comparison with those of the existing investigations and the calculated value of the velocity in the mixing zone for Görtler. The flow pattern and vortices were observed by flow-visualization. Consequently, the windbreak is effective for the perforated plate of porosity ratio λ=0.238.