高速部分流泵CFD计算和优化设计

为研究高速部分流泵中流量系数、扬程系数和比转速三者之间的关系,对该泵主要参数进行了优化设计.在水泵性能试验的基础上,采用Matlab软件对试验数据进行数值拟合,推导出三者的函数关系式,并对主要性能参数进行了精确计算.将优化后的参数应用于Pro/E建模,运用ANSYS-CFX进行了数值计算和外特性试验.结果表明,中间截面静压呈环状梯度由轮毂向轮缘逐渐递增,出口静压满足优化要求;流线云图中虽然存在漩涡,但隔舌处的回流和涡流得到了明显的改善;从扬程-流量试验曲线也可以看到,在从小流量到设计工况点间运行非常平稳.该结果为实际工程应用提供了一定参考.

CFD calculation and optimal design of high-speed partial emission pump

In order to research the relationships among flow coefficient,head coefficient and specific speed of high-speed partial emission pump,the main parameters of the pump were optimized designed.Based on the experimental date of pump performance,the test date were numerically fitted by Matlab software and the function of those was obtained.The optimized parameters were modeled by Pro/E,and both the numerical computation with ANSYS-CFX and external characteristics test were carried out.The results show that the static pressure of symmetrical section can satisfy the optimization requirements.Although there exist swirls in the stream contours,the unexpected flow field with back flow and vortex component near the tongue were distinctly improved.From low flow rate to design condition,the pump performance of H-Q test curve is very smooth,and which provides a certain reference for practical engineering.