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燃烧室出口旋流度对透平一级静叶的流动传热有影响。本文对RANS模型应用于旋流计算中的效果进行研究,并分析燃烧室出口旋流形式和强度。针对实心叶片以及全气膜冷却叶片进行分析,研究了不同强度旋流条件对于叶片和气膜冷却系统覆盖效果的影响。结果表明:燃烧室出口旋流形式分为“C”型和“O”型,强度范围0.～0.8。旋流使叶片表面传热局部有增加,流动损失增加。旋流强度对气膜冷却系统有一定影响,前缘的冷却受影响较为显著。
The swirling degree at the outlet of the combustion chamber has an impact on the flow and heat transfer of the turbine first stage vane. In this paper, the effect of the RANS model applied to the cyclone calculation is studied, and the form and intensity of the cyclone at the exit of the combustion chamber are analyzed. The effects of different intensities of swirling conditions on the coverage of the blade and the film cooling system were studied. The results show that the swirl flow at the outlet of the combustion chamber is divided into “C” type and “O” type with the intensity range of 0. ~ 0.8. Swirl so that the local heat transfer surface of the blade increases, increasing the loss of flow. The swirling intensity has some influence on the film cooling system, and the cooling of the leading edge is more significant.