带螺旋静叶诱导轮的气蚀性能

为了分析带螺旋静叶诱导轮的内部流动规律，利用计算流体力学（CFD）方法对带螺旋静叶诱导轮进行了仿真计算，研究了其扬程特性和气蚀性能。结果显示，安装螺旋静叶后，使诱导轮的扬程得到很大提升，但是因为螺旋静叶流道中回流较强，增大了回流损失，导致效率下降。随着诱导轮入口压力降低，带螺旋静叶诱导轮的气蚀区域受离心力作用，沿径向发展，由于堵塞螺旋静叶流道，推迟了诱导轮流道的堵塞时间，从而使诱导轮的气蚀性能得到改善。 

Cavitation performance of inducer with helical static blades

In order to study internal flow pattern, the 3D flow in inducer with helical static blades is numerically computed by using the computational fluid dynamics (CFD). The suction and cavitation performance of the inducer are analyzed. The results show that the head increases with helical static blades, while the efficiency decreases resulted from the strong backflow in helical static blade channels. As the inlet pressure decreases, the cavitation develops along the radial direction, which is influenced by the centrifugal force. The choked helical static blade channels delay the appearance time of blocked inducer, so the cavitation performance of the inducer with helical static blades is improved.