Measurements of three components of mean velocity and simultaneous time-resolved measurements of axial and vertical turbulent velocities and their cross moment were made at three perpendicular planes slightly upstream of the corner and in the downstream interaction region of a cylinder-flat plate junction with and without an upstream circular manipulator. The circular manipulator was a smooth circular cylinder of 1.25 mm diameter, which was placed upstream of the cylinder at X/D = 1.2, within the boundary layer above the flat plate surface. Results show that when the manipulator is in place, there is a decrease in the axial mean velocity and increases in the axial mean squared turbulent velocity and turbulent shear stress at the first plane. There is an expanded region of secondary flow with reduced circulation, indicating that the manipulator has reduced the strength of the horseshoe vortex in this region.
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机译：分别在拐角稍上游的三个垂直平面上以及在带有和不带有气缸的平板平板接合处的下游相互作用区域中的三个垂直平面上，测量了平均速度的三个分量，并同时进行了轴向和垂直湍流速度及其交叉矩的时间分辨测量。上游圆形机械手。圆形操纵器是直径为1.25mm的光滑圆柱体，其以X / D ＝ 1.2放置在圆柱体的上游，位于平板表面上方的边界层内。结果表明，当机械手就位时，在第一平面处轴向平均速度会降低，而轴向均方湍流速度和湍流切应力会增加。存在二次流的扩大区域，循环减少，这表明操纵器在该区域降低了马蹄涡流的强度。
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