翅片厚度对平行流蒸发器传热与流动性能的影响  

Effect of fin thickness on heat transfer and flow performance of parallel flow evaporator

作　　者：周光辉[1] 徐云婷[1] 刘恩海[1] 李海军[1] 苏之勇 胡亚晗 

机构地区：[1]中原工学院能源与环境学院,郑州450007

出　　处：《低温与超导》2017年第5期59-64,共6页Cryogenics and Superconductivity

摘　　要：基于某车用空调多元平行流蒸发器,以平行流蒸发器的百叶窗翅片为研究对象,利用ANSYS 15.0软件对百叶窗翅片模型进行数值模拟,研究探索百叶窗翅片厚度对平行流蒸发器传热与流动性能的影响,并分别对其五种结构在不同雷诺数Re_(LP)时的传热与流动性能进行了综合评价分析。将数值模拟结果与经验关联式进行对比,传热因子j与阻力特性f因子的最大误差分别为12.16%和5.29%,满足实际工程误差允许范围。结果表明:在雷诺数ReLP不变时,换热系数与压降均随着百叶窗翅片厚度的增加而增大;采用综合评价因子j/f^(1/3)分析得出,A型结构翅片综合性能最好,能够有效强化空气侧换热、提高系统的换热能力,其研究结果可为百叶窗翅片结构优化提供参考依据。The ANSYS15.0 software was used to simulate the model of the fin of a parallel flow evaporator. The effect of the thickness of the shutter on the heat transfer and flow performance of parallel flow evaporator was studied. The heat transfer and flow performance of five different structures at different Reynolds numbers ReLp were analyzed. By comparing the numerical simu- lation results with the empirical correlation results, the maximum errors of the heat transfer factor j and the resistance characteris- tic f factor are 12.16% and 5.29% respectively, which could satisfy the practical engineering errors. The results show that the heat transfer coefficient and pressure drop increase with the increase of the thickness of the shutter when the Reynolds number ReLP is constant. By using the comprehensive evaluation factor j/f1/3 to evaluate the five kinds of A - E structures, a structure with the best overall performance can effectively enhance the air side heat exchanger and the heat transfer capacity of the system. The research results can provide reference basis for louver fin structure optimization.

关 键 词：汽车空调 平行流蒸发器 百叶窗翅片 数值模拟 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]