4034 粗面境界層における壁面圧力変動と速度変動の同時計測(G05-8 境界層・はく離,G05 流体工学)  [in Japanese] 4034 Simultaneous Measurement of Velocity and Wall Pressure Fluctuations for Rough Wall Turbulent Boundary Layer  [in Japanese]

Measurements have been performed in the vicinity of the roughness element for the equilibrium boundary layer developing over the rough wall, proposed by J.C. Rotta. Wall pressure and velocity fluctuations were measured simultaneously at x≒2180mm. The Reynolds numbers based on momentum thickness and roughness height were 6500 and 160 respectively. Wall pressure and squared velocity-gradient fluctuations is well correlated near rough wall. By conditional sampling, the event of negative wall pressure corresponds to the momentum exchange process between cavity flow and its above outer flow.