回転平板上の境界層遷移に関する研究

抄録

The laminar-turbulent transition of a boundary layer on a rotating flat plate has been investigated. After careful examination of the transition of the stationary boundary layer, the flat plate was rotated around the axis which was parallel to the plate and perpendicular to the free stream direction. The measurement of the wall shear stress and the flow visualization revealed significant effects of Coriolis acceleration on the transition. The transition of the low pressure side boundary layer was characterized by a turbulent spot which had a distinct boundary with the quiescent surroundings. The transition of the high pressure side boundary layer was characterized by enhanced vortical motions.