叶轮几何参数对漂浮潜水泵外特性的影响

Effect of Impeller Geometrical Parameters on External Characteristics of Floating Submersible Pumps

为了研究叶片数和包角对漂浮潜水泵外特性的影响,基于Pro/E软件建立了漂浮潜水泵内部流场模型,利用Fluent对其内部流场进行数值模拟,探讨了不同叶片数和包角对漂浮潜水泵外特性、内部流场、叶片受力和速度分布的影响。结果表明:随着叶片数增加,效率曲线的高效区向大流量方向不断扩展;扬程曲线随着包角的增大而变得陡峭;效率曲线的极值点随着包角的增大向小流量方向移动,且高效区的范围不断缩小;存在工况最优的叶片数和包角。研究结果可为优化叶轮几何参数、改善内部流场分布和提高泵效率提供一定参考。

In order to study the effects of different blade numbers and wrap angles on external characteristics of floating submersible pumps, an inner flow field model is established based on Pro/E. Fluent is used to conduct the numerical simulation to discuss the influence of blade numbers and wrap angles on external characteristics, inner flow fields, blade stresses and velocity distri- butions of floating submersible pumps. The result shows that high efficiency area moves towards the direction of large capacity with the increase of blade numbers. Pump head curves becomes steep with the increase of wrap angles. The extreme value point of efficiency curve shifts to the direction of low discharge and high efficiency area keeps shrinking. There are optimum solutions of blade number and wrap angle. The paper provides certain references for optimization of impeller geometrical parameters, coordination of inner flow field distributions and improvement of pump efficiency.