Navier - strokes equation was solved using simple method . lam - bremhorst k - e was used to simulate turbulent flow . it was indicated in this thesis that a longitudinal vortex would be produced after the jet exhausted from a plate into a boundary layer at a pitch angle and a skew angle 研究结果表明，有一定倾斜角度的单个射流与主流作用后，将在下游产生一个流向涡旋，涡旋使得边界层内的速度和雷诺应力发生严重扭曲，从而形成上洗区域和下洗区域。
