矩形通道内冲孔矩形小翼涡流发生器的流动换热特性  

Flow and heat transfer characteristics punching rectangular winglet vortex generator of rectangular channel

作　　者：韩志敏[1] 徐志明[1] 赵宇 王景涛[1] 刘坐东[1] HAN Zhi-min;XU Zhi-ming;ZHAO Yu;WANG Jing-tao;LIU Zuo-dong(College of Energy and Power Engineering,Northeast Electric Power University,Jilin 132012,China)

机构地区：[1]东北电力大学能源与动力工程学院

出　　处：《热科学与技术》2018年第5期345-352,共8页Journal of Thermal Science and Technology

基　　金：国家自然科学基金资助项目(51476025)

摘　　要：雷诺数Re=214-10 703时,通过数值模拟方法对布置有冲孔和无孔的两种矩形小翼涡流发生器的矩形通道进行了传热和流阻特性的研究。计算结果表明：在低雷诺数下,冲孔矩形小翼涡流发生器的传热因子j值与无孔矩形小翼涡流发生器相差不大,而在高雷诺数下,冲孔涡流发生器的传热因子j值略低于无孔涡流发生器,大约低1.03%-3.05%。在相同的雷诺数下,无孔矩形小翼涡流发生器的阻力因子f大于冲孔涡流发生器,而且随着雷诺数的增大二者的差距也越来越大。通过对比综合性能指标可知,两种通道的综合性能指标均随着雷诺数的增加而减小,而且冲孔矩形小翼涡流发生器的综合性能要优于无孔矩形小翼涡流发生器。Under the Reynolds number Re from 214 to 10 703, the flow and heat transfer characteristics in rectangular winglet vortex generators of rectangular channel with and without punching are numerically simulated. The results show that, at low Reynolds number, it does not appear to be much different between rectangular winglet vortex generators with and without punching in heat transfer factor j value. However, at relatively high Reynolds number, j value of punching vortex generators is slightly lower than that without punching, about lower from 1.03% to 3.05%. At the same Reynolds number, the resistance factor of rectangular winglet vortex generators without punching is greater than that with punching, and the difference becomes bigger and bigger with the increasing of Reynolds number. By comparing the comprehensive performance indicators, it is found that the comprehensive performance of two kinds channel both decrease with the increasing of Reynolds number, and that the comprehensive performance of rectangular winglet vortex generators with punching is superior to to that without punching.

关 键 词：涡流发生器 冲孔 强化传热 流动阻力 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]