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用数值计算的方法研究了冲击-多斜孔壁复合冷却方式的冷却特性,在保证当量开孔面积相同且压降相同的前提下,研究了冲击孔壁与多斜孔壁开孔面积比Ai/Ae变化对冷却特性的影响.研究发现,随着冲击孔与多斜孔开孔面积比减小,多斜孔壁气膜出流速度降低,气膜覆盖增强,冲击传热系数呈增大趋势,使得模型冷却效果增强;多斜孔壁热侧、冷侧与多斜孔孔内换热量随开孔面积比减小而减小,多斜孔内换热量在模型总体换热量中所占比例逐渐增加.
Numerical simulation is used to study the cooling characteristics of the impingement-multi-inclined-hole wall cooling system. Under the premise of ensuring the same equivalent opening area and the same pressure drop, the relationship between the opening area ratio / Ae on the cooling characteristics.The results show that with the reduction of the area ratio of impact hole to multi-inclined hole, the outflow velocity of multi-inclined hole wall decreases, the film coverage increases and the impact heat transfer coefficient increases The heat transfer efficiency of the multi-slant hole wall decreases with the decrease of the opening area ratio, and the heat transfer in the multi-slant hole hole increases with the overall heat transfer In the proportion of gradually increased.