船用冷却泵的数值模拟与优化设计  

Improvement design and numerical simulation of ship cooling pump

作　　者：刘建瑞[1] 王董梅[1] 苏起钦[1] 徐永刚[1] 张立胜[1] 

机构地区：[1]江苏大学流体机械工程技术研究中心,江苏镇江212013

出　　处：《排灌机械工程学报》2010年第1期22-24,30,共4页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家863计划项目(2006AA100211)

摘　　要：为了适应船用泵的发展,研制开发新型高效船用冷却泵,采用了Fluent模拟泵内流场,对CB80-65-125型船用冷却泵进行优化.模拟分析了设计工况下,叶轮优化前后,叶片背面与工作面的相对速度分布及z=0平面上的静压分布.根据模拟得到的结果,通过修改叶片进口安放角和叶片形状,对泵进行了优化设计,并对叶轮优化前后的流场进行了分析比较.对泵做了性能试验,并将试验结果与模拟结果作了对比.结果表明,叶轮内部流场和相对速度分布都得到了改善,优化后的叶轮形状更符合流动特性,泵流量和扬程都能满足要求,高效区宽,设计工况点的效率提高了3.56%.因此,结合Fluent模拟泵内流场来进行优化设计的方法是可行的.The CB80-65 -125 ship pump was optimized to match the improving progress. The Fluent software was used to simulate the flow field in the pump for the optimization. The profile of static pressure in z = 0 plane and the relative velocity on both the pressure and the suction surface were simulated at de- sign point for the impellers before and after optimized. According to the results, the impeller can be opti- mized by changing the inlet angle of blade and the blade shape. By comparing between the impellers be- fore and after the optimization, it can be obtained that interior flow field and the relative velocity profile in the optimized impeller are improved. And the optimized impeller shape matches the flow characterictic. It can satisfy the request both in head and flow rate, and the high efficiency area is wide. Beside, the effi- ciency of the design point is raised 3.56 percentage points, the performance is optimized. It can be proved that the optimization method combined with simulation technology is feasible.

关 键 词：船用冷却泵 离心泵 流场 数值模拟 优化设计 

分 类 号：TH311[机械工程—机械制造及自动化]