离心泵径向力的数值模拟与实验研究

Numerical simulation and experimental analysis of radial force of centrifugal pump

在泵装置设计中,径向力的大小一直是人们所关心的问题。基于Fluent流体商用软件对一种离心泵的内流场进行数值模拟。比较径向力数值模拟结果与实验值,发现最大误差为8.1%,误差在设计流量工况下最小,测量精度最高,并且各流量工况下平均误差为4.34%,证明数值模拟预测离心泵的径向力是可行的。将离心泵数值模拟与实验的流量扬程曲线进行对比,趋势比较一致,误差不超过8.3%。在此基础上根据提出的径向力计算模型计算出泵在各流量工况下径向力的大小和方向。针对离心泵内部结构特征研制了一种径向力测量装置,开展径向力测量试验,得到了各工况下径向力的大小。

In the design of pump unit,the magnitude of the radial force is always the focus of people’s concern.In this study,the internal flow field of a centrifugal pump was numerically simulated by using Fluent software.By comparing the radial force numerical simulation results with the experimental values,it was found that the maximum error was 8.1%;under the designed flow condition,the error was the minimum,and the measurement accuracy was the highest;the average error under each flow condition was 4.34%.The results proved that it was feasible to predict the radial force of the centrifugal pump by numerical simulation.The numerical simulation results were compared with the experimental flow head curve.The trend was consistent,and the error was less than 8.3%.On this basis,the magnitude and direction of the radial force under various flow conditions were calculated according to the radial force calculation model.Based on the internal structure characteristics of the centrifugal pump,a radial force measurement device was developed.The radial force measurement test was carried out,and the magnitude of the radial force under various working conditions was obtained.