Host: Science Council of Japan
Co-host: Architectural Institute of Japan, Japan Association for Wind Engineering, The Institute of Electrical Engineering of Japan, Japan Society of Steel Construction, Japan Society of Civil Engineering, Meteorological Society of Japan
Pages 42
The aim of this study is to clarify the reason why the span-wise coherence of fluctuating pressures on two-dimensional bluff sections is larger than that of fluctuating wind velocities. The surface pressure and the velocity fluctuation around a 2-D model with rectangular section of B/D=5 (B: chord length, D: depth of the section) were measured in grid turbulence and in the artificially generated 3-D fluctuating flow. In conclusion, it is considered that vortex is formed around leading edge and the strong fluctuation of surface pressure by external pulsation is produced by the change of the size of the separation bubble.