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用数值方法求解Ｎ－Ｓ方程，并用“亚迭代”方法保证时间方向二阶精度，数值模拟了 ７５° 后掠三角翼非定常绕流，给出了详细的涡破裂起始攻角附近涡破裂的形成、发展和演化过程． 涡破裂从开始的螺旋破裂变为向泡状破裂演化的“过渡态”，然后发展到泡状破裂，再由泡状 破裂变为向螺旋破裂演化的“过渡态”，最终发展到典型的螺旋破裂形态．从计算结果中还发 现，当泡状破裂形成后破裂点前移速度明显减慢，同时当从泡状破裂向螺旋破裂演变时，破裂 点出现后移现象．可从最近相关的实验和数值模拟结果中发现这些现象的存在．
The N-S equation is solved numerically and the second-order time precision is guaranteed by the “sub-iteration method”. The unsteady flow around a 75 ° sweepback wing is numerically simulated, and a detailed vortex rupture The formation, development and evolution of the process. Vortex rupture changes from the initial spiral rupture to the “transitional state” which evolves into a bubble-shaped rupture, and then to the bubble rupture. From the bubble rupture to the “transition state” which evolved into a spiral rupture, the vortex ruptures to a typical spiral Rupture morphology. It is also found from the calculation results that when the bubbling rupture is formed, the speed of the rupture point is obviously slowed down, and at the same time, the rupture point appears to shift backward when the bubbling rupture changes to the spiral rupture. The existence of these phenomena can be found from the results of recent relevant experiments and numerical simulations.