离心压缩机二元和三元叶轮内流分析

Internal Flow Analysis Between 2-D & 3-D Impellers of Centrifugal Compressor

选择两个不同相对轴向尺寸和相对宽度的叶轮，在各自子午型线保持不变的情况下，分别对每一个叶轮构造普通圆弧叶片和三元扭曲叶片。利用Ｓ１，Ｓ２流面理论简化计算模型对所构成的具有不同叶片形式的叶轮进行了内部流场计算。着重对比了叶片表面的速度分布，对其起因进行了分析讨论。

Two centrifugal impellers with different relative axial sizes and relative exit widths are studied.The 2-D and 3-D blades are designed for both the impellers respectively under their same meridional contours for each studied impellers.The internal flow field of the impellers with different blade type are compared using the quasi-three dimensional flow surface theory.Special emphasis are given on the differences between the blade surface velocity distributions and the results are analysed and discussed.