单排管空冷散热器换热与阻力特性试验及数值研究  

Experimental and Numerical Simulation Study on Heat Transfer and Resistance Characteristics of Single-row Tube Air-cooled Radiator

作　　者：杨霄 袁益超[1] YANG Xiao;YUAN Yi-chao

机构地区：[1]上海理工大学上海市动力工程多相流动与传热重点实验室

出　　处：《电站系统工程》2019年第5期5-8,共4页Power System Engineering

摘　　要：通过模化试验和数值模拟,研究了单排管空冷散热器翅片侧的换热与阻力特性,并拟合出换热与阻力特性的试验关联式。研究结果表明:散热器翅片侧的对流换热系数和流动阻力均随迎面风速的增大而增大,且换热系数增幅随迎面风速的升高而减小;流动阻力与迎面风速基本呈线性关系。同时,数值模拟结果与试验结果相比较,二者换热特性的无量纲准则数相对误差为1.47%~8.68%,阻力特性的无量纲准则数Nu相对误差为1.69%~2.46%,且上述准则数在所研究的雷诺数Re范围内变化的趋势一致,吻合性较好,相对误差在合理范围内,验证了数值模拟方法的可行性。The modeling experimental test and numerical simulation were performed to study the heat transfer and resistance characteristics of single-row tube air-cooled radiator,and the experimental correlation formula of heat transfer and resistance characteristics were fitted.The study results showed that the fin side's heat transfer coefficient and flow resistance of the radiator were increased with the facing velocity,and the growth rate of heat transfer coefficient was decreased with the facing velocity,the flow resistance was basically linear with the facing velocity.Meanwhile,compared with the results of experimental tests and numerical simulation,the relative error of dimensionless criterion Nu of the heat transfer characteristic was 1.47%-8.68%,the relative error of dimensionless criterion Eu of the resistance characteristic was 1.69%~2.46%.The above criterion had the same trend of change within the studied range of Reynolds number Re,and good anastomosis,the relative error was within a reasonable range,the feasibility of the numerical simulation method was verified.

关 键 词：模化试验 数值模拟 单排管空冷散热器 换热系数 流动阻力 

分 类 号：TK124[动力工程及工程热物理—工程热物理]