为改善发动机进口帽罩表面加热效果，针对气膜防冰结构开展了数值模拟研究，重点分析了不同吹风比和圆柱孔、腰形孔和气膜缝等3种开孔形状的气膜结构对帽罩表面加热效率的影响。数值研究结果表明：对于圆柱孔和腰形孔气膜结构，随着吹风比增大，气膜出现脱壁现象，最佳吹风比为0.8；对于气膜缝结构，随着吹风比的增大，整体气膜加热效率逐渐增大，在气膜口处有较好的加热效果。

In order to improve the heating performance of engine inlet cone surface, a numerical simulation study was carried out for the film antiicing structure. The effects of different blow ratios and air film structures with three opening shapes including cylindrical hole, waist hole and slot on the heating efficiency of the cone surface were analyzed emphatically. The numerical research results show that with the increase of blow ratio, the air films of cylindrical hole and waist hole are detached from the wall, and the best blow ratio is 0.8. For the slot structure, with the increase of blow ratio, the overall heating efficiency of the air film gradually increases, and there is a good heating efficiency at the film outlet.

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