漂浮取水泵叶片几何参数优化数值模拟  

Numerical Simulation of Blade Geometric Parameters Optimization of Floating Water Pump

作　　者：张世富[1] 吴杰[2] 张起欣[2] 张冬梅[1] 

机构地区：[1]后勤工程学院国家救灾应急装备工程技术研究中心,重庆401311 [2]后勤工程学院军事供油工程系,重庆401311

出　　处：《中国农村水利水电》2016年第10期173-178,共6页China Rural Water and Hydropower

基　　金：国家科技支撑计划(2014BAK05B08);国家工信部物联网专项(ZX201426903);重庆市科技攻关计划项目(cstc2012gg-sfgc00002)

摘　　要：为了优化漂浮取水泵叶片几何参数,基于Pro/E建立了不同参数叶片内部流场模型,利用FLUENT进行数值模拟,探讨了不同叶片数、包角度数、叶片厚度对漂浮取水泵的外特性、内部流场、叶片受力和速度分布的影响。结果表明:叶片数越大,叶片表面相同位置液流速度越大;叶片数对流量功率曲线影响较大,对效率曲线影响不显著;包角度数应适中,过大会导致叶片表面出现局部低压,过小会导致叶片出口压力积聚;随着包角的增大,效率曲线驼峰特性越显著,高效区向流量减小方向移动;叶片厚度对外特性曲线影响不明显。研究结果可为优化叶片几何参数、改善内部流场分布以及提高泵的效率提供一定参考。In order to optimize impeller geometric parameters of floating water pumps, different inner flow field models of different parameters are established based on Pro/E. FLUENT is used to conduct the numerical simulation to discuss the influence of impeller blade numbers, wrapping angles of blade and blade thickness on external characteristics, inner flow fields, blade stresses and velocity distributions of floating water pumps. The result shows that, in the same position, the larger blade numbers, the faster velocity of blade surface is. Impeller blade numbers have a great, impact on power-flow curve as opposed to efficiency curve. Suitable impeller wrapping angles are required, for which big angles lead to local low pressure on impeller surface and small ones result in a buildup of pressure at the outlet. With the increase in blade numbers, the hump characteristic of efficiency curve is more obvious and high effi- ciency area moves towards the direction of small flows. Blade thickness has little effect on external characteristics curve. This paper provides certain references for the optimization of impeller geometric parameters, coordination of inner flow field distributions and improvement of pump efficiency.

关 键 词：漂浮取水泵 叶片数 包角度数 叶片厚度 数值模拟 

分 类 号：TV675[水利工程—水利水电工程] S277.92[农业科学—农业水土工程]