水滴型凸肋通道内流动换热的数值模拟  

Numerical Simulation of Flow and Heat Transfer in Drop-shaped Microchannels with Pin-fins

作　　者：杨超[1] 胡艺凡 闫子豪 莫奇 熊心悦 许玉[1] YANG Chao;HU Yi-fan;YAN Zi-hao;MO Qi;XIONG Xin-yue;XU Yu(Key Laboratory of Aircraft Environment Control and Life Support of Ministry of Industry and Information Technology,Nanjing University of Aeronautics and Astronautics,Jiangsu Nanjing 210016,China)

机构地区：[1]南京航空航天大学,飞行器环境控制与生命保障工业和信息化部实验室,江苏南京210016

出　　处：《广州化工》2020年第11期59-62,100,共5页GuangZhou Chemical Industry

基　　金：国家自然科学基金(51806104);江苏省自然科学基金(BK20180426);航空科学基金(20182852024);中央高校基本科研业务费专项资金(3082018NS2018006);江苏高校优势学科建设工程资助项目。

摘　　要：通过三维数值模拟方法,研究了水滴型凸肋通道内的阻力和换热特性,并重点考察了尾缘角度对特性的影响。工况为Re=100~700,尾缘角度=25°、30°、35°和60°。结果表明:水滴型凸肋通道的流阻比圆柱型的小,换热性能比圆柱型的好,具有更好的综合性能。对于水滴型凸肋通道,尾缘角度对流阻的影响相对不明显,而对换热的影响较明显。不同Re下水滴型凸肋通道综合性能的最优解不同,当Re=400~700时,30°为最优,当Re=100~400时,60°为最优。The characteristics of flow resistance and heat transfer in microchannels with drop-shaped pin-fins are studied through three dimensional numerical simulation,and the effect of trailing edge angle on characteristics is investigated intensively.The simulation conditions are Re=100~700,and trailing edge angle=25°,30°,35°,and 60°.The simulation results indicate that microchannels with drop-shaped pin-fins has smaller flow resistance and better heat transfer performance than microchannels with cylindrical pin-fins.For microchannels with drop-shaped pin-fins,the effect of the trailing edge angle on flow resistance is not obvious,while the effect on heat transfer performance is more significant.There are different best trailing edge angles under different conditions,namely,30°for Re=400~700 and 60°for Re=100~400.

关 键 词：凸肋 水滴 压降 换热 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]