新型井泵水力设计及内部流动的数值模拟

在改进QJ型深井离心泵结构的基础上，研究提出了一种SJB型新结构深井离心泵及其特殊的水力设计方法，即叶轮的极大扬程设计法和扭曲反导叶法．将叶轮外径延伸至泵筒内壁，采用斜切叶轮出口．导叶进口边扭曲，其余部分为圆柱叶片．运用CFD软件Fluent 6．0对模型100SJB8进行数值模拟研究，分析流场并预报其水力性能，经试制100SJB8样机并比较试验结果，表明模拟能较好地预测水力性能，为设计提供指导．

Hydraulic design of new-type deep well pump and its flow calculation

A new-type deep well pump SJB was developed by improving the structure of QJ.Based on the research on SJB,a new hydraulic design-impeller head maximum approach and twisted return guide vane method were proposed.The front shroud was extended to the inner pump casing and the inclined impeller outlet was used.The inlet of the return guide vane was designed to be twisted and the remaining part was cylindrical.The flow calculation was performed on model 100SJB8 by commercial CFD software Fluent 6.0.The hydraulic performance was also calculated.By comparing with the test model 100SJB8,it was proved that the calculation was able to forecast the performance and to guide the design.