中文摘要：

基于RNG k-ε紊流模型和雷诺时均N-S方程,运用商用CFD软件对双向竖井贯流泵装置进行了三维流动数值仿真计算。对流道内的水力损失分析借鉴了微元法分析原理,通过对比分析分段水力损失可知：竖井作为进水流道时,其尾部汇合处水力损失较大,直管式出水流道在靠近导叶出口端水力损失较大,竖井作为出水流道在分叉处水力损失较大。通过调整竖井及直管式流道型线,有效减小水力损失,泵装置外特性有了较好的提升,最终完成水力性能优化设计。最终优化后的双向竖井贯流泵装置在叶片安放角为0°时数值计算结果正向运行效率最高达72.0%,反向为57.9%;模型试验结果正向运行效率最高达70.4%,反向为56.2%。

英文摘要：

Based on the RNG k-ε turbulent model and Reynolds Navier-Stokes equation,the hydraulic performance of the bidirectional shaft tubular pump was simulated with the commercial CFD software. By comparing the hydraulic loss of each part,the results indicated that the hydraulic loss at the tail of the shaft tubular was large when the shaft tubular was used as inlet passage,and the hydraulic loss near the outlet of the vane and the bifurcation of the shaft tubular was also large when the shaft tubular was used as outlet passage. The hydraulic losses of the shaft tubular and straight passage were small when they were used as inlet passages due to the frictional head loss,but the hydraulic losses were large when they were used as outlet passages,with the effect of circulation and spread section,the flow was easy to be taken off,thus the hydraulic losses were large. The performance of the pump unit was improved compared with the original case,as the head loss was significantly reduced by adjusting the hull lines of the flow channel,and finally the hydraulic performance optimization design was finished. The efficiency of the simulation was up to 72. 0% under positive condition,and it was up to 57. 9% under reverse condition,the efficiency of the model test was up to 70. 4% under positive condition,and it was up to 56. 2% under reverse condition.