本文采用气动传热耦合计算方法研究了轮毂封严冷气和叶冠泄漏流动对涡轮性能以及热负荷的影响。研究结果表明端区泄漏流动会引起流动损失并导致涡轮做功能力下降,不同股泄漏流动对涡轮效率的影响可以近似满足线性叠加规律。固体部件热传导对叶片气动负荷几乎没有影响,而由轮毂封严冷气造成的温度梯度会显著改变壁面换热特性,此时必须采用气热耦合计算才能准确预测热负荷。 In this paper, the influence of hub seal airfoil and leaking flow on turbine performance and heat load is studied by the coupled method of heat transfer and heat transfer. The results show that the leakage flow in the end zone can cause loss of flow and decrease the workability of the turbine. The influence of leakage flow of different strands on turbine efficiency can approximately meet the linear superposition rule. The thermal conductivity of the solid parts has almost no effect on aerodynamic loads on the blades. However, the temperature gradient caused by the seal of the hubs will significantly change the heat transfer characteristics of the wall. In this case, the heat and air coupling calculation must be used to accurately predict the heat load.