進行波状薄膜上の平行平板間乱流における抵抗低減効果

抄録

An experiment is performed to investigate the drag-reduction effect in a turbulent channel flow on a traveling wave wall. The wall is made of a thin rubber sheet vibrating to generate a traveling wave. The rubber sheet was vertically placed at the middle of the channel. A piezoelectric actuator is used as a vibrating source. A vibration experiment with the input frequency of 120Hz is investigated to check whether or not to occur a traveling wave. Since the phase velocity does not become within the range of effective parameter for drag reduction, the pressure-drop difference between uncontrolled and controlled cases cannot be confirmed.