The influence of residual stress for the strength of plate-fin structures in the typical operation process of Liquefied Natural Gas (LNG) heat exchanger

doi:10.2516/ogst/2021063

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	The influence of residual stress for the strength of plate-fin structures in the typical operation process of Liquefied Natural Gas (LNG) heat exchanger
	Ma, Hongqiang 1,3; Jia, Jiwei 1,3; Luo, Xinmei 1; Wang, Li 3; Hou, Caiqin 3; Wang, Gang 3; Zhang, Yujin 2
刊名	OIL & GAS SCIENCE AND TECHNOLOGY-REVUE D IFP ENERGIES NOUVELLES
	2021-12-06
卷号	76
ISSN号	1294-4475
DOI	10.2516/ogst/2021063
英文摘要	In order to ensure the safe operation of heat exchangers in the Liquefied Natural Gas (LNG), the stress analysis model of aluminum Plate-Fin Structure (PFS) is established based on the thermal-elastic-plasticity theory. The residual stress distribution of PFS and its influence on the structural strength is analyzed by the thermal-structural coupling method. The results indicate that the residual stress distribution of PFS is very complex, and the residual stress reaches the peak at the Brazed Joint (BJ). Due to the equivalent stress at BJ near the fin is higher than that at BJ near the plate, cracks are more easily produced at BJ near the fin. Therefore, the existence of residual stress has a negative impact on PFS, which may increase the possibility of strength failure at BJ under the typical operating conditions (normal operation, cut-down and heat-up) of the heat exchanger. In addition, the residual stress gradually decreases with the brazing cooling rate decrease. The residual stress within the PFS will be effectively reduced by properly reducing the brazing cooling rate, which can slow down the strength failure of the PFS. The above research results will provide an important basis for the design and safe operation of the aluminum plate-fin heat exchanger.
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	EDP SCIENCES S A
WOS记录号	WOS:000726975800001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/154953]
专题	土木工程学院
作者单位	1.East China Jiaotong Univ, Sch Civil Engn & Architecture, Nanchang 330013, Jiangxi, Peoples R China; 2.Hebei Univ Architecture, Dept Energy Engn, Zhangjiakou 075000, Peoples R China 3.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou 730050, Peoples R China;
推荐引用方式 GB/T 7714	Ma, Hongqiang,Jia, Jiwei,Luo, Xinmei,et al. The influence of residual stress for the strength of plate-fin structures in the typical operation process of Liquefied Natural Gas (LNG) heat exchanger[J]. OIL & GAS SCIENCE AND TECHNOLOGY-REVUE D IFP ENERGIES NOUVELLES,2021,76.
APA	Ma, Hongqiang.,Jia, Jiwei.,Luo, Xinmei.,Wang, Li.,Hou, Caiqin.,...&Zhang, Yujin.(2021).The influence of residual stress for the strength of plate-fin structures in the typical operation process of Liquefied Natural Gas (LNG) heat exchanger.OIL & GAS SCIENCE AND TECHNOLOGY-REVUE D IFP ENERGIES NOUVELLES,76.
MLA	Ma, Hongqiang,et al."The influence of residual stress for the strength of plate-fin structures in the typical operation process of Liquefied Natural Gas (LNG) heat exchanger".OIL & GAS SCIENCE AND TECHNOLOGY-REVUE D IFP ENERGIES NOUVELLES 76(2021).