附面层中马蹄形旋涡的实验研究

本文用烟流显示和热线方法研究附面层中马蹄形旋涡的形态、生成频率、配对和涡系之间的相互作用。

Investigation of Horseshoe Vortices in Laminar Boundary Layer

Smoke visualization and hot-wire technique are used to study horseshoe vortices in laminar boundary layer. It is shown that pairing of horseshoe vortices can induce strong ejection of low-speed field from the wall and entrain high-speed field from the outer region of boundary layer. The linkage of horseshoe vortices with counter-rotating streamwise vortices near the wall and the formation of horseshoe vortice from deformation of sheets of transverse vorticity are also described.