Numerical simulation on effect of outer layer gas flow rate and coupling degree on arc characteristics of GPCA-TIG welding

	Numerical simulation on effect of outer layer gas flow rate and coupling degree on arc characteristics of GPCA-TIG welding
	Huang, Yong; Lu, Suzhong; Wang, Xinxin; Li, Hui
刊名	Hanjie Xuebao/Transactions of the China Welding Institution
	2016-06-25
卷号	37 期号:6 页码:69-74
关键词	Anodes Cathodes Chemical activation Conservation Gas welding Gases Heat flux Inert gas welding Oxygen Activating TIG welding Arc characteristics Axisymmetric modeling Coupling degree GPCA-TIG welding Maximum temperature Shielding gas Species conservations
ISSN号	0253360X
英文摘要	A two-dimensional axisymmetric model for Gas Pool Coupled Activating TIG welding is established based on the MHD theory and species conservation. Arc plasma coupled with cathode is numerically simulated by simplified cathode sheath model. By solving this model, the distributions of temperature, oxygen, current density and heat flux at anode surface under different outer layer gas flow and coupling degree are obtained. The results show that the arc of gas pool coupled activating TIG welding constricts, the velocity of plasma and arc pressure at anode surface increase compared with TIG arc under the same conditions. Increasing the flow rate of oxygen or the coupling degree, the maximum temperature of arc rises, the trend of oxygen diffuses into arc is more obvious, the welding arc constricts slightly, the peak values of current density and heat flux at anode surface all increase. © 2016, Editorial Board of Transactions of the China Welding Institution, Magazine Agency Welding. All right reserved.
语种	中文
出版者	Harbin Research Institute of Welding
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/112437]
专题	材料科学与工程学院
作者单位	State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Huang, Yong,Lu, Suzhong,Wang, Xinxin,et al. Numerical simulation on effect of outer layer gas flow rate and coupling degree on arc characteristics of GPCA-TIG welding[J]. Hanjie Xuebao/Transactions of the China Welding Institution,2016,37(6):69-74.
APA	Huang, Yong,Lu, Suzhong,Wang, Xinxin,&Li, Hui.(2016).Numerical simulation on effect of outer layer gas flow rate and coupling degree on arc characteristics of GPCA-TIG welding.Hanjie Xuebao/Transactions of the China Welding Institution,37(6),69-74.
MLA	Huang, Yong,et al."Numerical simulation on effect of outer layer gas flow rate and coupling degree on arc characteristics of GPCA-TIG welding".Hanjie Xuebao/Transactions of the China Welding Institution 37.6(2016):69-74.