我们建造了一台具有2∶1压比的试验径流式过轮,而且以空气过轮性能试验方法研究了叶轮尺寸参数的影响。在研究影响时使用了一个具有四种不同通道面积的叶轮系列和另一个具有不同的导向轮(exducer)出口、平均直径、但有相同的出口环形面积的三种叶轮的系列。此外,还研究了叶轮与壳体之间侧隙及喷嘴出口与叶轮进口之间径向间隙的影响。 We have constructed a test runner wheel with a 2: 1 pressure ratio and studied the effect of the impeller size parameters on an air-through performance test. A series of impellers with four different passage areas and another three impellers with different exit exits and average diameters but with the same exit annulus area were used to study the impact. In addition, the effect of the backlash between the impeller and the housing and the radial clearance between the nozzle outlet and the impeller inlet was also studied.