非稳态温度场中二维流道截面弹性波传递过程的理论分析  

A theoretical study of transmitting of elastic wave on the section of a two-dimensional flow channel under non-steady temperature field

作　　者：刘杰[1] 贾晓玲[2] 

机构地区：[1]上海电机学院,上海200240 [2]同济大学,上海201804

出　　处：《应用力学学报》2014年第2期246-250,312,共5页Chinese Journal of Applied Mechanics

基　　金：上海电机学院科研启动经费项目(13QD13)

摘　　要：针对燃料电池二维流道热弹性波的传递问题,采用经典的保形变换复变函数解析方法,考虑非稳态温度场,建立了二维流道表面动态热应力分布的理论解析模型,并得到了采用汉克尔函数表示的复函数解析解;为说明理论模型的可行性,本文进行了二维圆形和椭圆形流道表面动态热应力分布系数的计算。计算结果表明:非稳态温度场对流道表面的应力分布的影响与表面曲率相关,且瞬时冲击特性明显。By some classical conformal mappings, considering a non-steady temperature field, an analytical model of dynamic thermal stress distribution to explain the process of elastic wave transferring on the section of a two-dimensional flow channel in fuel cell stacks is built. An analytical algorithm solution expressed by Hankel function is given. To illustrate feasibility of above model, the dynamic thermal stress distribution coefficient of a two-dimensional circular and an elliptical flow channel are numerically estimated, discussed and shown in figures in details. Based on all numerical results obtained, it can be concluded that transient and impulse attribute can be shown clearly for non-steady temperature field which affect the stress distribution on the section of flow channels.

关 键 词：流道 弹性波 保形变换 非稳态温度场 

分 类 号：O343.6[理学—固体力学]