车用涡轮增压器压气机变海拔性能多目标优化设计  

Multi-objective Optimization and Design of Varying-altitude Performances for Vehicle Turbocharger Compressor

作　　者：刘刚[1,2] 汪陈芳 杨震寰[3] 张扬军[1] 

机构地区：[1]清华大学汽车工程系汽车安全与节能国家重点实验室,北京100084 [2]军事交通学院军用车辆系,天津300161 [3]中国北方发动机研究所(天津),天津300400

出　　处：《车用发动机》2013年第5期8-11,21,共5页Vehicle Engine

基　　金：国家自然科学基金(51176087)

摘　　要：应用多目标优化设计思想,以某涡轮增压柴油机压气机的变海拔等熵效率和压比为优化目标,以惩罚函数的形式建立了目标函数。在原压气机的基础上,通过对主叶片进行几何参数提取,确定了几何约束条件并建立了相应性能数据库。优化结果显示,在海拔0m和海拔2 500m工作条件下,等熵效率较原型机分别提高了3.95%和3.29%,变海拔性能得到显著优化。Taking the isentropic efficiency and pressure ratio of turbocharger compressor as the targets, the objective function was built according to the penalty function based on the multi-objective design. The geometric parameters of main blade for the original compressor were extracted and the geometric restraint conditions and performance database were established. The opti- mization and design results showed that the isentropic efficiencies of compressor increased by 3.95 % and 3.29 % respectively in the altitude of 0 m and the altitude of 2 500 m, and the varying-altitude performances improved obviously. words,

关 键 词：离心式压气机 变海拔 多目标优化 

分 类 号：TK423.5[动力工程及工程热物理—动力机械及工程]