コリオリカ場における境界層遷移 : 低圧面境界層における乱流斑点の発生と成長

抄録

The artificial turbulent spots in Blasius boundary layer developed on low pressure wall, in which Coriolis force affects normal to the wall, have been investigated. The turbulent spots are initiated by the jet disturbance through a small hole on the test surface. The probability of the spot generation with constant disturbance intensity shows that Coriolis force stabilization reduces the generation of the turbulent spot, agreeing with the previous result of the natural transition related to the Emmons theory. The ensemble-averaged measurement of the velocity field of the turbulent spot shows that that the turbulent intensity near the wall is dumped and that the spanwise growth is inhibited by Coriolis force.