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利用损失模型及计算流体力学方法对低比转速R32离心和旋涡泵性能预测进行研究,结果表明:损失模型与计算流体力学方法预测出的性能曲线吻合较好;低比转速离心泵中轮阻损失占总流动损失的80%以上,对泵性能有重要影响;旋涡泵的纵向旋涡强度随流量增大而减弱;离心泵比旋涡泵具有较宽的运行范围,在小流量情况下旋涡泵比离心泵具有较高的效率和扬程。研究工作对丰富低比转速泵流动理论与设计方法具有参考价值。
The loss model and computational fluid dynamics (CFD) method are used to predict the performance of R32 centrifuge and vortex pump with low specific speed. The results show that the loss model is in good agreement with the performance curve predicted by computational fluid dynamics Which accounts for more than 80% of the total flow loss, which has an important influence on the performance of the pump. The longitudinal vortex strength of the vortex pump is weakened with the increase of the flow rate. The centrifugal pump has a wider operating range than the vortex pump. When the flow rate is small, Pump has high efficiency and lift. The research work has reference value for enriching theory and design method of low specific speed pump flow.