导流器叶片进口安放角对潜水泵性能的影响

Effects of Inlet Setting Angles of Space Guide Vanes on Submersible Pump Performances

导流器叶片进口安放角是影响潜水泵性能的重要几何参数,在导流器特性曲线理论分析的基础上,运用计算流体动力学理论对同一叶轮与不同进口安放角导流器组合后的潜水泵三维模型进行数值模拟,得到其性能曲线,并就安放角变化对潜水泵性能的影响规律进行分析,同时在水泵试验台上进行实测验证。结果表明：随着导叶片进口安放角的增大,潜水泵最佳工况点向大流量方向偏移。当导叶片进口安放角位于27~30时,潜水泵工作效率为75%~81%,处于较高值,相应工作流量为95~125m3/h,模拟值与实测值吻合较好。通过改变导流器叶片进口安放角,在一定工况范围内,潜水泵同样可以保持较高的效率,为增加其规格并扩大使用范围寻找出了一种新的途径。

The inlet setting angle of a space guide vane is an important geometric parameter that affects performance of a submersible pump.Based on theoretical analysis,space guide vanes with the same impeller and different inlet setting angles were formed to construct the 3-D model of the submersible pump.Through the numerical simulation after the model by computational fluid dynamics（CFD） theory,the performance curves are obtained.Then influence of inlet setting angle variation on submersible pump performances was analyzed.Simultaneously,the simulation results are tested.The results show that the optimum operating point of a submersible pump is shifted to the large flow rate under the condition that the inlet setting angle of the space guide vane increases.The efficiency is 75%~81% and the flow rate amounts to 95~125 m3/h under the condition that the inlet setting angle of the space guide vane amounts to 27 ~30.Simulated values are closely matched with the measured ones.Variation of inlet setting angles of the space guide vane can maintain a high efficiency of submersible pumps under certain operating conditions,which provides a new way of increasing specifications and expanding application scopes.