间隙对螺旋离心泵性能影响的预测及试验

Prediction and Experiment about the Effect of the Clearance on Performance of Screw Centrifugal Pump

通过改变叶片外缘与壳体之间的间隙,运用CFD软件对螺旋离心泵进行了内流场的数值计算,对其外特性进行了预测。并在相应条件下通过螺旋离心泵的性能试验进行比较;研究了间隙变化对泵性能的影响,给出了间隙的合理范围,为螺旋离心泵的设计提供了一定的理论和试验依据,同时也说明了数值计算研究方法对开展泵性能预测的重要性。

The numerical calculation about the interior flow field of the screw centrifugal pump with the CFD software by changing the clearance between the impeller outer edge and shell was given and based on which the exterior performance of the pump was predicted. The performance experiments were done at the same conditions. Compared the performance prediction with the experimental results, the effect of clearance on the pump performance was analyzed and the reasonable range of clearance was given which provided some meaningful references for the design of screw centrifugal pump, and the importance of the numeric simulation method was indicated.