抄録
To investigate the effects of Coriolis force on turbulent boundary layer developing on top, bottom and side walls of a rotating, rectangular channel of low aspect ratio, quantitative experiments were performed. Time-mean velocity and turbulence intensity were measured in detail by a hot-wire anemometry. From the experimental results, the boundary layer development was found to be promoted strongly on the low-pressure (trailing) side and suppressed on the high-pressure (leading) side, in comparison with the case of zero-rotation due to the secondary flow effect of Coriolis force. Secondary flow near the surfaces of top and bottom walls of the channel inhales fluid of high turbulence energy and low momentum from the high-pressure side, and stuffs it into the boundary layer on the low-pressure side. Also, flow in boundary layer was stabilized on the low-pressure side and destabilized on the high-pressure side due to the stabilizing and destabilizing effects of Coriolis force, respectively.
