用正交试验研究分流叶片对离心泵性能的影响

Splitter blades′ effect on characteristics of centrifugal pump by orthogonal experiment

为了研究分流叶片各设计参数对离心泵性能的影响,选取周向偏置角、偏转角、分流叶片进口直径及叶片数4因素,制定了L9(34)正交试验方案,对每个试验叶轮分别进行了数值计算和试验研究,详细分析了分流叶片设计参数对离心泵性能的影响规律.结果表明,影响离心泵扬程和效率的最主要因素分别是叶片数和叶片直径;而泵性能最优情况下,分流叶片的最佳组合参数为:叶片数Z取较大值,周向位置为0.60θ,进口直径约为2/3D2,偏转角为-5°^-10.°试验结果和数值模拟结果基本吻合,验证了数值计算方法的有效性和可靠性,为进一步研究低比转速离心泵的水力性能和优化设计方法提供了有益的参考.

In order to study the influence of splitter blade ＇s parameters on the centrifugal pump performance, a L^9 （3^4） orthogonal experiment was designed with four factors and three values. These factors were bias angle β in peripheral direction, deflection angle, inlet diameter and numbers Z of splitter blades. The numerical calculations and performance tests were carried out on each impeller, and the influence laws of splitter blades parameter on the centrifugal pump performance were analyzed in detail. The results show that the primary factors for the head and efficiency are blade numbers Z and inlet diameter D＇, and that the best combination of parameters for performance isβ =0.60 θ,D＇ =2/3D2, α = -5° - - 10° and Z values as high as possible. Comparing with the results of the performance test and the numerical simulation, it was confirmed that the numerical simulation method was reliable and valid, and can offer some useful references for hydraulic performance and the optimization design of low specific speed centrifugal pump