基于STARCCM+的离心式冷却水泵叶轮优化设计  

Optimization design of centrifugal cooling water pump impeller based on STAR CCM+

作　　者：雷刚 徐雪汉 谭巍 杨联林 王虎银 LEI Gang;XU Xuehan;TAN Wei;YANG Lianlin;WANG Huyin(Institute of Vehicle Engineering,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]重庆理工大学车辆工程学院,重庆400054

出　　处：《排灌机械工程学报》2022年第9期874-879,共6页Journal of Drainage and Irrigation Machinery Engineering

基　　金：重庆市重点产业共性关键技术创新专项重点研发项目(cstc2017zdcy-zdyfX0020)。

摘　　要：为解决汽车冷却水泵叶轮在设计优化中存在设计周期长、优化方法不明确等问题,基于离心泵设计与计算流体动力学(CFD)理论,设计一种半开式叶轮并进行优化.首先确定叶轮各项结构参数并通过三维建模软件CATIA V5对水泵进行实体的初步建模,然后利用CFD计算软件STAR CCM+对水泵设计模型进行性能仿真分析,得到水泵截面的绝对压力云图、相对速度矢量图以及湍动能分布图,最后通过MATLAB遗传算法工具箱以水泵总的能量损失最小为目标对叶轮进出口宽度、进出口直径、进出口角度等主要结构参数进行优化,从而得到水泵叶轮最佳设计参数.研究结果表明:通过对多个工况点下优化前后冷却水泵性能仿真对比,MATLAB遗传算法工具箱在对水泵的优化过程中起到重要的作用,在寻找叶轮结构参数最优组合时具有明显优越性,且结果合理可靠,经叶轮优化后的水泵性能优良,额定工况下水泵效率提高了2.3%.In order to solve the problems in the design optimization of automobile cooling water pump impeller,such as long design cycle and unclear optimization method,a design and optimization method of semi-open impeller under rated operating condition was proposed based on the theory of centrifugal pump design and computational fluid dynamics(CFD).Firstly,the structural parameters of the impeller were determined,and the water pump was preliminarily modeled by the 3D modeling software CATIA V5.The design model was simulated and analyzed by using the CFD software STAR CCM+,and the absolute pressure cloud diagram,velocity vector diagram and turbulent kinetic energy distribution diagram of the pump section were obtained.Finally,the main structural parameters of the impeller,such as inlet and outlet widths,inlet and outlet diameters,inlet and outlet angles,were optimized by MATLAB genetic algorithm toolbox with the aim of minimizing the total energy loss of the pump.The results of the study show that MATLAB genetic algorithm toolbox plays a significant role in the process of pump optimization through the simulation comparison of the cooling water pump before and after optimization under multiple operating conditions.In addition,MATLAB genetic algorithm toolbox has ob-vious advantages in finding the optimization combination of impeller structural parameters,and the results are reasonable and reliable.The pump performance after impeller optimization is excellent,and the pump efficiency has been increased by 2.3%under rated operating conditions.

关 键 词：汽车冷却水泵 半开式叶轮 能量损失 STAR CCM+软件 MATLAB遗传算法工具箱 

分 类 号：TH132[机械工程—机械制造及自动化]