基于形状变量和全局响应面法的增压器涡轮多目标优化  

Multi-Objective Optimization of Turbocharger Turbine Based on Shape Variable and Global Response Surface Method

作　　者：刘孟祥[1,2,3] 胡辽平[2] 谢辉[3] 

机构地区：[1]湖南涉外经济学院机械工程学院,长沙410205 [2]湖南天雁机械有限责任公司,衡阳421005 [3]天津大学内燃机燃烧学国家重点实验室,天津300072

出　　处：《内燃机工程》2013年第4期71-76,共6页Chinese Internal Combustion Engine Engineering

基　　金：湖南省自然科学基金项目(11JJ6036);湖南省科技计划资助项目(2012RS4050);湖南省科技计划项目(2012RS4053);湖南省教育厅优秀青年项目资助(2013);教育部青年骨干教师国内访问学者资金资助(2013);湖南省"十二五"车辆工程重点建设学科项目(湘教发[2011]76号)

摘　　要：应用HyperMesh软件中HyperMorph模块的网格变形功能创建了增压器涡轮8个形状变量。为减少计算量,运用试验设计(DoE)分析方法对形状变量进行筛选,去掉1个对体积、最大应力和最大变形影响都不显著的因子。针对筛剩的7个变量,利用HyperStudy中的全局响应面法(GRSM)对涡轮进行了多目标优化,得到了涡轮体积和最大形变量之间的帕雷托边界。帕雷托边界表明:当体积属于[5 400,5 700]mm3区间时,增加涡轮体积与减少最大形变量具有明显的相关性;当体积大于5 700mm3时,继续增加体积对减小最大形变量无明显作用。形状变量、涡轮体积与形变量的蛇形关系图表明:体积为较小值时,形变量均较大;最大形变量为较小值时,体积依然有可能取较小值。研究方法与结论为增压器涡轮的优化设计提供了指导,具有一定的工程应用价值。Eight shape variables of turhocharger turbine were built up by using grid morphing function of HyperMorph module in HyperMesh software. In order to reduce the computational work load, the shape variables were screened by using Design of Experiment （DOE） analysis method and one factor which had not significant influence on the volume, max. stress and deformation was removed. In allusion to these seven variables left, multi-objective optimization of turbine was conducted by using Global Response Surface Methodology （GRSM） in HyperStudy software, and then Pareto-boundary between turbine volume and maximum deformation was obtained. As the Pareto-boundary showed, when the volume was greater than or equal to 5 400 mm^3 , but less than or equal to 5 700 mm^3 , there was obvious correlation between turbine volume increase and max. deformation reduction; when the volume was greater than 5 700 mm^3 , still increasing the turbine volume could not produce significant effect on reduction of the max. deformation. Shape variables- turbine volume-turbine deformation serpentine diagram shows that when the turbine volume is rather small, the deformation is relatively large; the turbine volume can still be taken a smaller value even if the max. deformation is rather small. The research method and conclusions provide a guidance for the optimization design of turbocharger turbine and is of certain engineering application value.

关 键 词：内燃机 增压器 涡轮 全局响应面法 多目标优化 形状变量 试验设计（DoE） HYPERMESH 

分 类 号：TK41[动力工程及工程热物理—动力机械及工程]