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用带数值扩散项的欧拉法对某型三维发动机进气道水滴撞击特性进行了研究.实现了可压流场中三维复杂形体的局部水滴收集系数的计算.数值扩散项的引入解决了欧拉法计算产生奇异结果发散的问题.通过对不同进气道流量的算例结果的比较,发现进气道流量对进气道唇口附近的水滴撞击区和撞击量都有影响.进气量大,最大局部水滴收集系数也大.通过对有无整流罩的计算结果进行比较,发现此型发动机整流罩对水滴撞击特性的影响很小.
The impact of the droplet impinging on the inlet of a three-dimensional engine was studied by the Eulerian method with numerical diffusion. The local droplet collection coefficients of the three-dimensional complex body in the compressible flow field were calculated. The introduction of numerical diffusion term Rafah calculation results in divergence of singular results.According to the comparison of calculation results of different inlet flow, it is found that the inlet flow has an impact on the drop impact area and the impact amount near the lip of inlet port. Large and largest local drop collection coefficient is also large.Compared with the calculation results of whether there is a fairing, found that this type of engine cowling has little impact on the droplet impact characteristics.