论文部分内容阅读
给出了一种可以在多级透平环境中模拟三维粘性流动的数值方法，这种方法在各叶栅排作了相对定常流动的假设， 各叶栅排间通过“混合平面”传递参数。“混合平面”间传递周向平均的气动参数， 但保持了径向参数的变化和本列参数的周向不均匀性， 同时考虑了变比热容对多级透平计算的影响。通过对一ＮＡＳＡ 透平级的计算， 证实计算结果不仅和实验结果吻合的非常好， 而且很好地描述了流动的粘性效应和透平级内的涡结构
A numerical method that simulates three-dimensional viscous flow in a multi-stage turbine environment is given. This method assumes a relatively constant flow in each cascade and transfers the parameters through the “mixing plane” between cascade rows. The “mean plane” aerodynamic parameters are passed between “mixed planes”, but the variation of radial parameters and the circumferential inhomogeneity of the parameters in this column are maintained. Meanwhile, the influence of variable specific heat capacity on multi-stage turbine calculation is considered. Through the calculation of a NASA turbine stage, it is proved that the calculated results are not only very good in agreement with the experimental results, but also well described the viscous effect of flow and the vortex structure in the turbine stage