几何因子对波纹通道内稳态流动与换热的影响  

Effects of Geometric Parameters on Steady Laminar Heat Transfer in Wavy Channels

作　　者：谢公南[1] 王秋旺[1] 曾敏[1] 罗来勤[1] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,陕西西安710049

出　　处：《计算物理》2007年第2期192-196,共5页Chinese Journal of Computational Physics

基　　金：国家自然科学基金(50323001);教育部霍英东教育基金会高等院校青年教师基金(91056)资助项目

摘　　要：采用曲线坐标系下压力与速度耦合SIMPLER算法,数值研究了一种波纹通道内周期性充分发展的稳态层流流动与换热情况,流动Re数的范围为20-500,Pr数为0.7.计算考察了不同Re数、纵宽比γ及纵横比对换热与阻力的影响.计算结果表明,Re数、纵宽比γ及纵横比较小时流体不出现任何回流;整体Nu数及fRe数随着Re数,纵宽比γ及纵横比的增加而增加,换热增强,但同时流动阻力增加.其计算结果可为波纹通道的设计提供参考依据.Periodically fully developed convective heat transfer characteristics in a two-dlmensional wavy channel are investigated numerically with a constant wall temperature. The calculations are performed with Pr = 0.7, Re = 20 - 500 on non-orthogonal non-staggered grids generated by an elliptic equation system. A semi-implicit method for pressure linked equations revised （SIMPLER） algorithm in curvilinear body-fitted coordinates is employed. Effects of Reynolds number and geometric parameters, such as aspect ratio φ and shape ratio γ, on heat transfer and friction factor are studied. It shows that no recirculation region occurs through the whole channel at low Reynolds numbers, small aspect ratio or small shape ratio. With the increase of Reynolds number, aspect ratio or shape ratio, heat transfer is enhanced due to flow recirculation. Corresponding friction factor increases simultaneously.

关 键 词：对流换热 波纹通道 几何因子 SIMPLER算法 

分 类 号：TK124[动力工程及工程热物理—工程热物理]