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本文利用张涵信提出的时、空二阶精度的隐式混合通量分裂的ＮＮＤ格式，通过求解非定常ＮＳ方程模拟了马赫数Ｍ为０．８、迎角α为２１．８°时某外形三角翼背风区旋涡破裂的发展、演变过程，并对旋涡区域的截面流态和涡轴上奇点附近的空间流动特征进行了分析。
In this paper, we use the NND format of the second-order implicit mixed flux fission proposed by Zhang Han-xin and solve the unsteady NS equation to simulate a triangle with a Mach number M of 0.8 and an angle of attack α of 21.8 ° The development and evolution of the vortex rupture in the leeward are analyzed. The characteristics of the spatial flow in the vortex region and the singular points in the vortex axis are also analyzed.