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为了获得内部换热效率和气膜冷却效率对综合冷却效率的影响规律,建立了简化物理模型对涡轮叶片复合冷却有效性进行分析,得到了内部换热效率与气膜冷却效率对综合冷却效率的影响规律:较低热负荷状态下,内部换热效率提高,综合冷却效率随之提高,内部换热效率对综合冷却效率影响大;较高热负荷状态下,气膜冷却效率对综合冷却效率影响增大,内部换热效率的影响减弱;过高的热负荷会出现综合冷却效率随着内部换热效率的增加而下降的情况,导致内部冷却失效。
In order to get the effect of internal heat transfer efficiency and film cooling efficiency on the overall cooling efficiency, a simplified physical model was established to analyze the effectiveness of the composite cooling of the turbine blades. The effect of internal heat transfer efficiency and film cooling efficiency on the overall cooling efficiency was obtained The law: when the heat load is low, the internal heat transfer efficiency is increased, the overall cooling efficiency is increased, and the internal heat transfer efficiency greatly affects the overall cooling efficiency. When the heat load is high, the effect of the film cooling efficiency on the overall cooling efficiency increases , The effect of internal heat exchange efficiency will be weakened. If the heat load is too high, the overall cooling efficiency will decrease as the internal heat exchange efficiency increases, resulting in the failure of internal cooling.