通道高度对翼型翅片印刷电路板换热器流动传热性能的影响  

Effects of Channel Height on the Thermal-Hydraulic Performance of Airfoil Fin Printed Circuit Heat Exchanger

作　　者：李德波 靳万龙 陈兆立 陈智豪 宋景慧 雷贤良[2] 邓磊[2] 车得福[2] LI Debo;JIN Wanlong;CHEN Zhaoli;CHEN Zhihao;SONG Jinghui;LEI Xianliang;DENG Lei;CHE Defu(China Southern Power Grid Technology Co.,Ltd.,Guangzhou 510080,China;State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]南方电网电力科技股份有限公司,广州510080 [2]西安交通大学动力工程多相流国家重点实验室,西安710049

出　　处：《动力工程学报》2024年第6期837-843,871,共8页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(U20B200381)。

摘　　要：基于通道几何尺寸对印刷电路板换热器(PCHE)流动与传热特性的影响,采用数值方法研究了通道高度对翼型翅片PCHE流动传热性能的影响。结果表明:通道高度显著影响PCHE的紧凑性、阻力与传热性能;在相同雷诺数条件下(R_(e)=6000~14000),随着通道高度H的减小(通道高度与横向节距之比H/S_(T)=0.12~0.60),范宁摩擦因子f先降低后升高,H/S T=0.24翼型翅片通道的f最低;H/S_(T)=0.24~0.60翼型翅片通道的柯尔本-j因子j几乎相同,H/S_(T)=0.12翼型翅片通道的j有所增加;j/f适合于评价不同高度翼型翅片通道的综合性能,以j/f作为综合性能评价指标时,H/S_(T)=0.24翼型翅片通道的综合性能最佳。The effect of channel height on the thermal-hydraulic performance of airfoil fin printed circuit heat exchangers(PCHEs)was investigated by numerical method based on the impact of channel geometry.Results show that channel height significantly affects the compactness,resistance,and heat transfer performance of PCHE.Under the same Reynolds number(Re=6000-14000),the Fanning friction factor f first decreases and then increasesas with the channel height H decreases(i.e.,the ratio of channel height to transverse pitch H/S T=0.12-0.60),with the lowest f observed at H/S_(T)=0.24.The Colburn-j factor j shows no significant change for airfoil fin channels with H/S_(T)=0.24-0.60,while an increase in j is observed at H/S T=0.12.The ratio j/f is suitable for evaluating the comprehensive performance of airfoil fin channels with different heights.When using j/f as the comprehensive performance evaluation indicator,the airfoil fin channel with H/S_(T)=0.24 exhibits the best overall performance.

关 键 词：印刷电路板换热器 通道高度 翼型翅片 流动传热性能 综合性能评价指标 

分 类 号：TK172[动力工程及工程热物理—热能工程]