竖直加热平板对流边界层的数值模拟  

Numerical simulation of the convection boundary layer in air along a vertical heated plate

作　　者：闫理贵[1] 傅松[1] 

机构地区：[1]山东大学能源与动力工程学院,山东济南250061

出　　处：《山东大学学报（工学版）》2009年第6期143-146,共4页Journal of Shandong University（Engineering Science）

基　　金：山东省自然科学基金资助项目(Y2007F26)

摘　　要：为了研究壁面温度和来流速度对边界层特性的影响,采用计算流体动力学(computational fluid dynamics,CFD)软件对空气流过竖直加热平板的对流边界层特性进行数值模拟.采用k-ε模型和SIMPLE算法分别对不同壁面温度的自然对流和不同来流速度的混合对流进行模拟计算,得到温度分布和速度分布,通过分析结果表明:高温对边界层特性的影响很小,而随着空气来流速度的增大,速度边界层和热边界层的厚度减小,最大速度增大.In order to study the effect of wall temperature and free-stream velocity on the characteristics of the boundary layer, the characteristic in a convection boundary layer in air along a vertical heated plate was numerically simulated with CFD （computational fluid dynamics） software. The different wall temperatures for natural convection and the free-stream velocity for the combined convection were simulated by the standard κ-ε model and the SIMPLEC algorithm, and the flow fields information, such as distribution of velocity and temperature were computed and analyzed. The results showed that the effect of high temperature on characteristics of the boundary layer was quite small, the thicknesses of velocity and thermal boundary layers decrease, and the maximum velocity increases with the free-stream velocity increasing.

关 键 词：自然对流 混合对流 边界层 壁面温度 来流速度 

分 类 号：O357.4[理学—流体力学]