电动燃油泵流道数值仿真及结构改进研究  

Numerical simulation of the internal flow and structural improvement in the electrical fuel pump

作　　者：陈忠[1] 张振东[1] 吴帅[1] 

机构地区：[1]上海理工大学机械工程学院,上海200093

出　　处：《机电工程》2016年第8期950-954,共5页Journal of Mechanical & Electrical Engineering

基　　金：教育部博士点基金资助项目(200802520001)

摘　　要：针对电动燃油泵流道内液体流动规律复杂,工作效率需要改善的问题,运用Fluent软件对燃油泵内部流场进行仿真分析。基于雷诺时均N-S方程和标准K-∑湍流模型以及标准壁面函数法,采用三维非结构四面体网格划分方法,对包括不同叶片数、不同叶片夹角和不同叶轮厚度的燃油泵结构模型进行了数值模拟,得到了燃油泵内部流场压力云图和流线图。以燃油泵叶轮结构参数为变量,出口流量为目标函数,通过对仿真结果进行了数值拟合,得到了叶轮叶片数,叶片夹角,叶轮厚度和出口流量的一般规律。并通过燃油泵台架实验,对优选的燃油泵性能进行了验证。研究结果表明,实验数据与仿真结果基本吻合,且改进后的燃油泵流量提高了2.5%左右,其工作性能得到改善。Aiming at studying the complicated internal flowed principles of the electrical fuel pump and improving its working efficiency,fuel pump＇s inner flow fields were simulated with the help of the numerical simulation software called Fluent which based on Reynolds time-averaged N-S equations and standard K-Σ turbulent mode as well as standard wall function method. To obtain the velocity and pressure distributions of inner flow of the fuel pump,it＇s impeller blades with different angles,numbers,and thickness were constructed and simulated by three-dimensional non-structural tetrahedral mesh. Fuel pump impellers＇ parameters were considered as variables,and the flow of the outlet was seen as a target function,According to the simulation result,the general pattern could be found between the flow of outlet and impeller blades＇ angles,numbers,and thickness by numerical fitting. Besides,the better fuel pumps＇ performance was verified by the bench tests of the fuel pump. The results indicate that the experimental data is similar with that of simulation,and the flow of outlet rises by 2. 5%,the working performance of fuel pump is actually improved.

关 键 词：燃油泵 叶轮 数值模拟 FLUENT 

分 类 号：TH302.2[机械工程—机械制造及自动化]