动车组牵引变流器风机流固耦合数值计算  

Numerical Simulation of Fluid-Structure for Fan of Traction Converter on Multiple Units

作　　者：张泽云[1] 谭宝来[1] 王东屏[1] 尤明[1] 

机构地区：[1]大连交通大学机械工程学院,辽宁大连116028

出　　处：《机械设计与制造》2015年第1期11-14,共4页Machinery Design & Manufacture

基　　金：国际科技合作计划资助项目(2010DFB80050)

摘　　要：为了获得动车组牵引变流器冷却风机内流场空气流动特性和风机结构强度。首先,基于不可压缩流体N-S控制方程和Standard k-ε湍流模型,建立了风机的三维计算模型。对模型进行非定常流动数值仿真,分析得出风机内部空气流动特性;其次,提取叶轮叶片、箱体壁面表面压力,将气动载荷作为体载荷施加到风机结构单元上,进行风机结构强度计算,确定出风机叶轮和箱体的最大应力的危险位置。计算表明:风机结构的最大等效应力为29.08MPa,小于结构材料Q235E的抗拉屈服极限。计算数据可为风机结构的优化设计提供理论依据。In order to seek for the flow characteristics of the cooling fan of？traction converter,the 3-D of the cooling fan of traction converter including impeller and box are built,based on the three-dimensional unsteady compressible Navier-Stokes equations and standard k-εturbulence model.The internal unsteady flow field is simulated.The aerodynamic loads as load are applied to the body structure of the cooling fan,and then calculating the structural strength of it.By analyzing the results,the lows of the internal flow field in the cooling fan are obtained,and the dangerous positions with maximum stress are determined.The analysis results can provide references for the design of the cooling fan as well.

关 键 词：风机 非稳态 压力分布 流固耦合 应力 

分 类 号：TH16[机械工程—机械制造及自动化]