Numerical simulation of arc plasma and weld pool in double electrodes tungsten inert gas welding

doi:10.1016/j.ijheatmasstransfer.2015.01.132

	Numerical simulation of arc plasma and weld pool in double electrodes tungsten inert gas welding
	Wang, Xinxin 1; Fan, Ding 1,2; Huang, Jiankang 1,2; Huang, Yong 1,2
刊名	INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
	2015-06
卷号	85 页码:924-934
关键词	Numerical simulation Double electrodes Arc plasma Weld pool Heat convection
ISSN号	0017-9310
DOI	10.1016/j.ijheatmasstransfer.2015.01.132
英文摘要	Based on a unified three dimension mathematical model developed in previous studies, arc plasma and weld pool in double electrodes tungsten inert gas welding are numerically investigated with emphasizes on electrode separation. The effects of small amounts of oxygen (4%) added to shielding gas on the weld pool dynamics are studied by neglecting its effect on the arc plasma reasonably. The distributions of current density, heat flux and shear stress at the anode are analyzed for various electrode separations. It is found that the electrode separation has a significant influence on the flow and temperature fields of arc plasma while has insignificant effect on the maximum temperature of it. With increase in the electrode separation, the distributions of current density, heat flux and temperature at the anode range from one peak profiles to two-peak profiles, while total heat input to the anode changes little. As the electrode separation increases, the extension of the weld pool alters from the direction vertical to the line through the two electrodes to that parallel to the line. The constriction of the weld pool width and increase of the weld pool depth are induced by the reversed heat convection in the weld pool due to small amounts addition of the oxygen. With a certain electrode separation, there exist two peak temperatures at the anode and local inward flow in the weld pool with argon shielding, while local outward flow appears with oxygen addition. (C) 2015 Elsevier Ltd. All rights reserved.
资助项目	National Science Foundation of China (NSFC)[51074084][51205179]
WOS研究方向	Thermodynamics ; Engineering ; Mechanics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000353249000087
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/34040]
专题	材料科学与工程学院
通讯作者	Fan, Ding
作者单位	1.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China 2.State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xinxin,Fan, Ding,Huang, Jiankang,et al. Numerical simulation of arc plasma and weld pool in double electrodes tungsten inert gas welding[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2015,85:924-934.
APA	Wang, Xinxin,Fan, Ding,Huang, Jiankang,&Huang, Yong.(2015).Numerical simulation of arc plasma and weld pool in double electrodes tungsten inert gas welding.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,85,924-934.
MLA	Wang, Xinxin,et al."Numerical simulation of arc plasma and weld pool in double electrodes tungsten inert gas welding".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 85(2015):924-934.