中文摘要：

基于标准k-ε紊流模型,雷诺时均N-S方程,运用流体计算CFD软件对某泵站双向竖井贯流泵装置进行三维流动数值模拟及水力性能优化设计。通过改变竖井流道的外轮廓线优化竖井流道,以及增加直导叶方案进一步对整体泵装置进行水力性能的优化,使水力损失下降12.6%,流道内流态平整,正向效率提高1.8%,反向效率提高大于3%。并与物理模型试验进行对比,正向误差为0.3%,反向误差为3%,结果基本吻合,满足工程应用要求,说明数值模拟应用到泵装置的优化设计是合理,可靠的,本文的研究以期为同类型泵站的优化设计提供参考。

英文摘要：

The hydraulic performance of bidirectional shaft passage is optimized by using CFD software in one hydraulic project based on the RNG κ-ε turbulence model and the Reynolds averaged Navier-Stokes equation. In order to optimize the hydraulic performance, the outside line of the bidirectional shaft passage is changed and a guide vane after the impeller in the reverse operation is added by calculating and comparing different shaft outlet conduit schemes. Different segments of hydraulic loss and velocity distribution has been obtained. The results indicate that the total hydraulic loss decreases by 12.6%, and the maximum reverse operation efficiency of the shaft tubular pump system increases by over 3%. By comparing the prior optimization with forward operation, it is clear that efficiency increases by 1.8%. Finally, comparing and combining the model test, results show that the error of the reverse optimization is 3%, and the error of the forward optimization is 3%, which confirms the reliability of the optimization design of the bidirectional shaft flow passage.