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采用雷诺平均N-S方程数值模拟了长深比L/D=12的空腔流动,分别计算了0.85Ma和1.5Ma两种速度下的流场,得到了空腔内压力、速度、涡量等分布图,分析了空腔内部流动特性。从计算结果可以看出,空腔流动明显表现出过渡式空腔流动特性,空腔前缘和后缘都有明显的涡流区域,而且当来流速度不同时,空腔内部流动分别表现出了闭式-过渡式和开式-过渡式的空腔流动特性。
The Reynolds-averaged Navier-Stratospheric (NS) equations were used to simulate the cavity flow with a depth of L / D = 12. The flow field under 0.85Ma and 1.5Ma velocities was calculated and the distribution of pressure, velocity and vorticity in the cavity was obtained Figure, analysis of the internal cavity flow characteristics. From the calculation results, it can be seen that the cavity flow obviously shows the transitional cavity flow characteristics, and the vortex front and rear edge of the cavity have obvious eddy current areas. When the flow velocity is different, the flow in the cavity respectively shows Closed-transition and open-transition cavity flow characteristics.