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基于三维N-S方程求解,采用三阶段精度TVD格式以及分区算法,结合自由型曲面复杂网格生成技术,开发了高效的冷气掺混流场计算方法。对某气冷涡轮在多种喷气方案下的流场进行了数值模拟,指出叶片前缘喷气对叶栅能量损失影响相对较小。叶片顶端开设离散孔喷气方案具有较小的能量损失以及较好的气冷效果。所开发的计算方法能够较好地应用于冷气掺混复杂流场的计算。
Based on the three-dimensional N-S equation, a three-phase precision TVD scheme and partitioning algorithm are combined with the free-form surface complex grid generation technique to develop an efficient method for calculating the flow field of air-conditioning blending. The numerical simulation of the flow field of an air-cooled turbine under various jetting schemes shows that the influence of blade leading edge jet on the cascade energy loss is relatively small. Discrete hole jetting at the tip of the blade provides less energy loss and better air cooling. The developed method can be applied to the calculation of complex flow field of air-conditioning system.