离心泵内流场计算及空间导叶内流动分析  

Numerical Calculation of Turbulent Flow in a Centrifugal Pump and Flow Field Analysis to Vaned Diffuser

作　　者：杨敏官[1] 李辉[1] 高波[1] 刘栋[1] 顾海飞[1] 

机构地区：[1]江苏大学,江苏镇江212013

出　　处：《流体机械》2008年第7期16-19,28,共5页Fluid Machinery

摘　　要：以带有空间导叶的离心泵为研究对象,通过CFD方法,在三种工况下,对包括吸入室、叶轮和导流壳在内的全三维湍流场进行数值计算,获得了导流壳内的速度分布和压力分布。结果表明:导流壳能很好地将叶轮中流出的流体的动能转化为压能,并消除速度的圆周分量;在0.8Q工况下,空间导叶的进口冲角增大,容易在空间导叶背面产生流动分离,造成水力损失增加;在1.2Q工况下,空间导叶的进口接近无冲击入流,在进口处流速分布较均匀,其内部未发生流动分离现象。此计算结果可以为试验研究和模型优化提供参考。To study on the turbulent flow in a centrifugal pump with vaned diffusers, based on CFD method,three-dimensional turbulent flow field in suction chamber, impeller and diversion shell was calculated at three different operating conditions, and the velocity and pressure distribution in diversion shell were obtained. The results indicate： diversion shell can transform the kinetic energy of fluid into pressure energy well, and eliminate the circumferential component of fluid; the inlet incidence angle of vaned diffuser increases at the condition of 0.8Q, and it results in flow separation very likely and the hydraulic loss increases; it is nearly non-impact inflow at the condition of 1.2Q, and the velocity distribution is uniform at the inlet of vaned diffuser and flow separation dose not appear. The results of calculation could be referenced for test research and model optimization.

关 键 词：空间导叶 离心泵 数值计算 

分 类 号：TH311[机械工程—机械制造及自动化]