锥形波纹管的力学性能与传热性能

Mechanical Properties and Heat Transfer Performance of Conically Corrugated Tube.

作者信息

Wu Zhiwei, Qian Caifu, Liu Gang, Liu Zhisheng, Sheng Ping

机构信息

Institute of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.

Shandong Meiling Chemical Equipment Co., Ltd., Zibo 255430, China.

出版信息

Materials (Basel). 2021 Aug 28;14(17):4902. doi: 10.3390/ma14174902.

DOI:10.3390/ma14174902

PMID:34500994

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8432666/

Abstract

Conically corrugated tube is a new type of high-efficiency heat exchange tube. In this paper, the mechanical and heat transfer properties of conically corrugated tubes formed by the cold rolling of smooth tubes are studied through experimental measurement and numerical simulation to lay the foundations for applying the tubes in heat exchangers. The results show that while conically corrugated tube has a lower axial elastic stiffness compared with smooth tube, conically corrugated tube has a higher yield strength and ultimate strength. Unlike smooth tubes, conically corrugated tubes develop three-dimensional stresses when an axial tensile load is applied to them. In addition, the heat transfer coefficient of conically corrugated tube is 15%, 17%, and 115% higher than that of spiral grooved tube, convergent divergent tube, and smooth tube, respectively. Finally, the correlation equations of the axial stress concentration factor, stiffness equivalent coefficient, Nusselt number, and flow resistance coefficient of conically corrugated tubes are obtained for engineering application.

摘要

锥形波纹管是一种新型高效换热管。本文通过实验测量和数值模拟研究了由光滑管冷轧而成的锥形波纹管的力学和传热性能，为该管在换热器中的应用奠定基础。结果表明，与光滑管相比，锥形波纹管的轴向弹性刚度较低，但屈服强度和极限强度较高。与光滑管不同，当对锥形波纹管施加轴向拉伸载荷时，会产生三维应力。此外，锥形波纹管的传热系数分别比螺旋槽管、缩放管和光滑管高15%、17%和115%。最后，得到了锥形波纹管轴向应力集中系数、刚度等效系数、努塞尔数和流动阻力系数的关联式，供工程应用。