垂直指数延伸板驻点混合对流与传热研究
发布时间：2018-11-15 15:02
【摘要】：研究不可压缩粘性流体在垂直指数延伸壁面上的二维驻点混合对流与传热问题,借助相似变换将边界层控制方程转换为非线性常微分方程,通过打靶法对其进行数值计算,用图表详细分析顺流和逆流时浮力参数λ和Prandtl数Pr对流体流动和传热特性的影响.结果显示:顺流时,表面摩擦系数和Nusselt数均随浮力参数λ的增大而增大;随着Pr数增大,Nusselt数增大而表面摩擦系数减小.逆流时,表面摩擦系数和Nusselt数均随浮力参数λ的增大而减小,随Pr增大而增大.
[Abstract]:The mixed convection and heat transfer problem of incompressible viscous fluid on the vertical exponentially extended wall is studied. The boundary layer control equation is transformed into nonlinear ordinary differential equation by similar transformation and the numerical calculation is carried out by shooting method. The effects of buoyancy parameters 位 and Prandtl number Pr on the flow and heat transfer characteristics of the fluid are analyzed in detail in this paper. The results show that the surface friction coefficient and the Nusselt number increase with the increase of the buoyancy parameter 位, while the Nusselt number increases and the surface friction coefficient decreases with the increase of the Pr number. The surface friction coefficient and Nusselt number decrease with the increase of buoyancy parameter 位 and increase with the increase of Pr.
【作者单位】： 福建船政交通职业学院汽车运用工程系;福州大学机械工程及自动化学院;
【基金】：2012年度中央财政支持地方高校发展专项资金资助项目(闽教财[2012]788号)
【分类号】：O357.1
[Abstract]:The mixed convection and heat transfer problem of incompressible viscous fluid on the vertical exponentially extended wall is studied. The boundary layer control equation is transformed into nonlinear ordinary differential equation by similar transformation and the numerical calculation is carried out by shooting method. The effects of buoyancy parameters 位 and Prandtl number Pr on the flow and heat transfer characteristics of the fluid are analyzed in detail in this paper. The results show that the surface friction coefficient and the Nusselt number increase with the increase of the buoyancy parameter 位, while the Nusselt number increases and the surface friction coefficient decreases with the increase of the Pr number. The surface friction coefficient and Nusselt number decrease with the increase of buoyancy parameter 位 and increase with the increase of Pr.
【作者单位】： 福建船政交通职业学院汽车运用工程系;福州大学机械工程及自动化学院;
【基金】：2012年度中央财政支持地方高校发展专项资金资助项目(闽教财[2012]788号)
【分类号】：O357.1
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