壁面に設けた微小ジェットを用いた壁面噴流の制御

抄録

Effectiveness of a micro jet on the flow control has been investigated experimentally for a stronger wall jet. A small tap on the wall for self-preserving development region generates the micro jet and suction for the turbulent wall jet. Flow rate of the jet/suction is limited smaller than 1/100 overall flow rate in the shear layer of the wall jet. Velocity measurement was made with constant temperature anemometers and single or crossed hot-wires. Integral of the streamwise momentum flux with respect to the whole layer was calculated to confirm effectiveness for the flow control. The micro jet increases mean velocity and integral of the streamwise momentum flux. However, suction has almost no influence on the mean velocity profile and the momentum integral.