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在转动坐标系里 ,讨论非结构网格下 ,含多排冷却孔的涡轮转子三维流场雷诺平均 Navier-Stokes方程组的求解。计算表明 :含冷却孔的转子流场计算要比静子流场复杂的多。为了得到较为满意的流场数值解 ,本文对叶片压力面与吸力面采用了不同的湍流模式、并且还对流场迭代中初始场选取方式以及转子叶尖间隙计算站的设置等问题进行了一系列的改进。几个典型流场算例表明 :初始场选取、湍流模式的合理选用对转动坐标系下获得一个收敛的三维流场数值解至关重要 ;另外 ,转子叶尖间隙站的设置直接影响着间隙附近的流场 ,尤其对现代高负荷涡轮转子 ,间隙流动的研究就更为重要。
In the rotating coordinate system, the solution of the Reynolds-averaged Navier-Stokes equations for the three-dimensional flow field of a turbine rotor with multiple rows of cooling holes under unstructured grids is discussed. Calculations show that the rotor flow field with cooling holes is much more complicated than the stator flow field. In order to obtain a satisfactory numerical solution of the flow field, different turbulence modes are applied to the pressure and suction surfaces of the blade, and the selection of the initial field in the iteration of the flow field and the setting of the rotor tip clearance calculation station are also carried out. Series of improvements. Several typical examples of flow field show that the selection of initial field and the reasonable selection of turbulence model are very important for obtaining a convergent 3D numerical solution of flow field in the rotating coordinate system. In addition, the setting of rotor tip clearance station directly affects the gap Of the flow field, especially for modern high-load turbine rotor, the study of the gap flow is even more important.