Thermal Performance of Elliptical Fin-and-Tube Heat Exchangers with Vortex Generator under Various Inclination Angles

作     者：WANG Yucheng ZHAO Wensheng WANG Pengfei JIANG Jin LUO Xiangyu WANG Yucheng;ZHAO Wensheng;WANG Pengfei;JIANG Jin;LUO Xiangyu

作者机构：Key Laboratory of Hydraulic Machinery TransientsMinistry of EducationWuhan UniversityWuhan 430072China School of Power and Mechanical EngineeringWuhan UniversityWuhan 430072China 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2021年第30卷第1期

页      面：257-270页

核心收录：

学科分类：080702[工学-热能工程] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：the financial support by National Natural Science Foundation of China(Grant No.51879201 U1867215) 

主　　题：heat exchanger vortex generator Colburn factor friction factor heat exchanger efficiency 

摘      要：Elliptical fin-and-tube heat exchangers are commonly used in air conditioning,heating,refrigeration industries,and *** study numerically investigates the effect of vortex generators on the performance of elliptical fin-and-tube heat exchanger under different inclination *** this study,air flow that is in the transitional regime is selected as the working *** numbers at the inlet are varied in a range of 1300 to 2100,and the shear stress transport k-ωturbulence model is selected to solve the non-closure of basic turbulence *** ellipticity ratios of the tubes which are used for the analysis are between 0.6 and 1.0,and the inclination angles are varied from 15°to 75°.The effects of different inclination angles of vortex generators on the Colburn factor j,friction factor f,and efficiency index j/f are *** friction and Colburn factors are observed to increase with increasing vortex generator inclination *** is found that the efficiency factors for a 15°vortex generator inclination angle at 0.6,0.7,0.8,and 0.9 ellipticity ratios improve compared to the corresponding cases with no vortex ***,the vortex generator cannot improve the efficiency factor of the circular tube heat *** 3 D CFD method employed by this study has great potential for use in optimally designing the arrangement of the vortex generators to enhance the performance of heat exchangers.