一、关于平均S_2流面 在叶轮机械准三元流动计算中,从原则上讲可以选取任一个S_2流面与多个S_1流面迭代求解。但当从整体上分析叶栅的气动性能或进行叶片的造型时,选取不同定义的平均S_2流面得到的不同解使我们难以唯一地确定一个叶片流道内的平均参数。不同的作者使用的平均S_2流面的定义是不同的。我们给这些不同定义的平均S_2流面标以新的名称以 First, on the average S_2 flow in the impeller mechanical quasi-ternary flow calculation, in principle, you can choose any one S_2 flow surface and multiple S_1 flow surface iterative solution. However, when the aerodynamic performance of the cascade is analyzed or the shape of the blade is analyzed as a whole, it is difficult to uniquely determine the average parameter in a blade runner by taking different solutions of the different defined average S_2 flow surfaces. The definition of average S_2 flow surface used by different authors is different. We label these differently defined average S_2 flow surfaces with new names