コリオリ力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内部構造

概要

論文の詳細を見る
The flow structure within a turbulent spot in a flat plate boundary layer stabilized by Coriolis force has been investigated. Hot wire measurement indicates the inhomogeneity of the ensemble-averaged velocity in the turbulent spot, suggesting the existence and the role of hairpin vortices. Lateral and spanwise growth is accomplished by consecutive generation of the hairpin vortices at the training edge of the spot. This structure and growth mechanism are essentially the same as in the stationary case. The spnanwise length scale of the inner structure is reduced by Coriolis force stabilization, resulting in the decrease in the spanwise growth rate of the spot itself. This stabilization effect has been attributed to the Coriolis term in the streamwise vorticity equation which makes a negative contribution to the generation of the hairpin vortex.
一般社団法人日本機械学会の論文
1995-08-25