Flow Phenomena around a Body with L-Type Cross Section

Abstract

The research on the flow around a L-type cross section bodies was carried out by an experiment and numerical simulation. The drag and lift of the bodies were measured in the range Reynolds number Re=1.5×(10)^4 to 6.5×(10)^4 in a uniform flow. The effects of the body position and Reynolds number on drag and lift coefficient were considered. The measurement of the drag and lift were carried out a direct method using the strain gauge load cells. A body of L type cross section with equal sides of one side 35mm, 3mm thickness was used as a test piece. As the result, the drag and lift coefficients hardly are affected in Reynolds number. Those coefficients are dominated by the position of the body for the flow. The drag coefficient shows the maximum value at the position in which projected area becomes a maximum. The life coefficient shows the maximum value at the position in which projected area becomes a minimum. The numerical simulation of the flow around a body was carried out by using CFD 2000 developed by Adaptive Research Co, . The drag and lift coefficients were calculated at various positions of the test piece and Reynolds numbers. Also, the velocity vector, pressure distribution, the drag and lift coefficients, and flow pattern around a body were obtained, and they were compared with experimental ones.