关键词: 贯流泵, 低比转速, 优化设计, 数值模拟, 模型试验

Abstract: To further study the performance of postpositional bulb tubular pumps, tubular pump impeller and guide vane were designed by CFD numerical simulation technology and the influence of the blade airfoil, the number, the thickness and the number of the guide vane, the distance of the guide vane to runner outlet on pump performance were analyzed. In the analysis, operation range of traditional tubular pump was extended and the low-speed and high-efficiency tubular pump model was obtained. The designed flow is 0.344m3/s, the head is 8.22 m, the specific speed is 630, and the highest efficiency is 83.45%. The model was tested and results showed that the performance curves of numerical simulation and model test were consistent, and the two results were in good agreement. The results of this study can provide a reference for the planning and design of the project of low specific speed and high lift pump station.

Key words: tubular pump, low specific speed, optimum design, numerical simulation, model test