肋片形式对Hampson型换热器流动换热特性影响  

Effect of Fin Form on Flow and Heat Transfer Characteristics of Hampson Heat Exchanger

作　　者：王悠悠 文键[1] 张星 王斯民[2] 厉彦忠[1] WANG Youyou;WEN Jian;ZHANG Xing;WANG Simin;LI Yanzhong(School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China;School of Chemical Engineering and Technology,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学能源与动力工程学院,西安710049 [2]西安交通大学化学工程与技术学院,西安710049

出　　处：《真空与低温》2021年第2期159-164,共6页Vacuum and Cryogenics

基　　金：国家自然科学基金(51676146)。

摘　　要：微型Hampson节流制冷机广泛应用于电子器件冷却,其换热器效率对制冷机的性能有着决定性作用。采用真实氩气物性参数,对Hampson型螺旋肋片管换热器进行了稳态三维数值模拟研究,研究了环形、螺旋形、锯齿螺旋形、扭曲锯齿螺旋形四种肋片形式的肋片管换热器的流动换热性能。结果表明:相较于螺旋形肋片,扭曲锯齿形肋片能显著提高近壁面工质流速并减小流动死区,使Eu数上升119.16%~121.14%,Nu上升38.98%~40.35%,综合强化换热效果最好。环形和锯齿形肋片会使壳程Eu分别上升-3.53%~-3.97%和94.82%~95.74%,同时会使Nu分别增大0.27%~0.80%和29.62%~30.97%,PEC准则数均大于1,综合效果有所提升。The miniature Hampson throttling refrigerator is widely used in electronic device cooling,of which the efficiency of the heat exchanger plays a decisive role in the performance of the refrigerator.Using the real physical parameters of argon,the steady state three-dimensional numerical simulation of Hampson spiral finned tube heat exchanger is carried out.The flow and heat transfer performance of spiral finned tube heat exchangers with annular fins,helical fins,serrated fins and twisted serrated fins are studied.The results show that,compared with spiral fins,twisted serrated fins significantly increase the flow velocity near the wall and reduce the dead zone,increasing shell side Eu by 119.16%~121.14%and Nu by 38.98%~40.35%,which have a good comprehensive strengthening effect for both flow and heat transfer.Annular and serrated fins can increase shell side Eu by-3.53%~-3.97%and 94.82%~95.74%,and Nu by 0.27%~0.80%and 29.62%~30.97%.As a result,the PEC criterion numbers of them are greater than 1,and the comprehensive effect is improved.

关 键 词：微型Hampson节流制冷机 肋片管换热器 数值模拟 AR 

分 类 号：TB611[一般工业技术—制冷工程]