不同排列方式的超临界LNG翼型翅PCHE流动换热性能研究  

Investigation on Thermal Hydraulic Performance of Supercritical LNG Airfoil PCHE with Different Arrangement Modes

作　　者：刘婉莹 唐凌虹[1] Liu Wanying;Tang Linghong(School of Mechanical Engineering,Xi’an Shiyou University,Xi’an 710065,China)

机构地区：[1]西安石油大学机械工程学院,西安710065

出　　处：《机电工程技术》2025年第4期85-89,154,共6页Mechanical & Electrical Engineering Technology

基　　金：陕西省自然科学基础研究计划(2023-JC-YB-350)。

摘　　要：由于近年来对于翼型印刷电路板式换热器,翅片的不同排列方式是研究重点,因此对不同排列方式的超临界天然气(LNG)翼型翅印刷电路板式换热器(PCHE)的流动换热性能进行了数值研究。结果表明:当垂直距离为2 mm时,交错距离由0 mm增加到4 mm,其Nu/Eu的值增加了近4%,这表明印刷电路板式换热器翼型肋片平行布置相比交错布置有着更好的传热性能,同时也伴随着较大的摩擦阻力;当交错距离为2 mm时,垂直距离由2 mm增加到5 mm,其Nu/Eu的值增加了近27%,但当垂直距离由4 mm增加到5 mm,其Nu/Eu的值仅增加了不到2%,这表明了交错布置下的翼型通道的综合性能要优于平行排列的翼型通道,垂直距离越小影响越明显,但随着垂直距离的增加,Nu/Eu的值增加幅度越来越小,这说明翼型交错布置和适当的稀疏布置更有利于流动和传热,但当垂直距离已经较大时,继续增加垂直距离的意义不大。In recent years,the different arrangement of fins has become the focus of research,so the flow heat transfer performance of supercritical natural gas(LNG)fin printed circuit plate heat exchangers(PCHE)with different arrangement is numerically studied.The results show that when the vertical distance is 2 mm,the Nu/Eu value increases by nearly 4%when the interleaving distance increases from 0 mm to 4 mm,which indicates that the parallel arrangement of the fins of the printed circuit plate heat exchanger has better heat transfer performance than the staggered arrangement,but also accompanied by greater friction resistance.When the interleaving distance is 2 mm,the Nu/Eu value increases by nearly 27%when the vertical distance increases from 2 mm to 5 mm,but when the vertical distance increases from 4 mm to 5 mm,the Nu/Eu value increases by less than 2%,which indicates that the comprehensive performance of the airfoil channel under the interleaving arrangement is better than that of the parallel arrangement,and the smaller the vertical distance,the more obvious the influence is.However,with the increase of vertical distance,the value of Nu/Eu increases less and less,which indicates that the staggered arrangement of airfoil and appropriate sparse arrangement are more conducive to flow and heat transfer,but when the vertical distance is already large,it is of little significance to continue to increase the vertical distance.

关 键 词：印刷电路板式换热器 超临界LNG 流动换热性能 

分 类 号：TK124[动力工程及工程热物理—工程热物理]