Relationship between the Intensity of Secondary Flow and Convection Heat Transfer in a Helically Coiled Circular Tube with Uniform Wall Temperature

作     者：ZHANG Jinlong ZHAO Chuangyao WANG Liangbi ZHANG Jinlong;ZHAO Chuangyao;WANG Liangbi

作者机构：School of Mechanical EngineeringLanzhou Jiaotong UniversityLanzhouGansu 730070China Key Laboratory of Railway Vehicle Thermal Engineering of MOELanzhou Jiaotong UniversityLanzhou 730070China School of Building Services Science and EngineeringXi'an University of Architecture and TechnologyXi'an 710055China 

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

年 卷 期：2023年第32卷第3期

页      面：1007-1022页

核心收录：

学科分类：080701[工学-工程热物理] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：supported by the National Natural Science Foundation of China(No.51776093,No.52066009) Transformation of S&T achievements in Universities of Gansu Province of China(No.2019C-06) Major Special Projects of Gansu Province of China(21ZD4GA027) Young Scientists Fund of Lanzhou Jiaotong University(2020038) 

主　　题：helically coiled circular tube convective heat transfer heat transfer enhancement secondary flow 

摘      要：Numerical method is used to investigate fully developed laminar flow in helically coiled circular tube in this *** non-dimensional parameter(secondary flow Reynolds number Se)based on absolute vorticity flux along the mainstream is used to indicate the intensity of secondary flow caused by the centrifugal effect in helically coiled circular *** relationship between the intensity of secondary flow and the intensity of laminar convective heat transfer is *** effects of curvature and torsion on the enhancement of heat transfer are also *** results reveal that the absolute vorticity flux along the mainstream can be used to indicate the local or averaged intensity of secondary flow;the non-dimensional parameter of the absolute vortex along the main flow determines the convective heat transfer and friction *** relationships of Nusselt number and friction factor with the Se are *** effect of curvature on Nusselt number is obvious,but the effect of torsion on Nusselt number is less obvious.