Numerical simulation of mixture gas arc of Ar-O2

doi:10.7498/aps.68.20190416

	Numerical simulation of mixture gas arc of Ar-O2
	Wang Xin-Xin 2,3; Chi Lu-Xin 2,3; Wu Guang-Feng 2,3; Li Chun-Tian 2,3; Fan Ding 1,4
刊名	Wuli Xuebao/Acta Physica Sinica
	2019-09-05
卷号	68 期号:17
关键词	Anodes Argon Computer simulation Diffusion Flow velocity Mixtures Numerical models Oxygen Population distribution Shielding Temperature Heat and mass transfer Local thermodynamic equilibrium Mixture gas Non-uniform distribution Oxygen distribution Temperature diffusion Thermodynamic parameter Transport coefficient
ISSN号	10003290
DOI	10.7498/aps.68.20190416
英文摘要	Mixture gas arcs are used extensively in welding manufacturing. A two-dimensional steady mathematical model for Ar-O2 mixture gas arc is developed to understand further the heat and mass transfer of the mixture gas arc. The model is based on the assumption of local thermodynamic equilibrium, and the thermodynamic parameters and transport coefficients are dependent on both the temperature and the oxygen content. In the present model, the diffusion between the argon species and oxygen species is depicted by the approach of the combined diffusion coefficient, i. e. the mixture gas arc is simplified into two different species, and the diffusion between them is formulated by combined ordinary diffusion coefficient and combined temperature diffusion coefficient; the oxygen distribution and its influence on the temperature and flow field of the arc are investigated for two different current conditions. It is shown that the oxygen species presents significant non-uniform distribution for argon gas mixed with 5% oxygen; the oxygen content is higher than that in mixed shielding gas in the regions close to the electrodes and arc axis, while its content is lower than that of the mixed shielding gas in other regions. For high current, oxygen concentrates more to the flat anode, while it concentrates more to tungsten cathode for low current. For both cases, oxygen content is inhomogeneous in the region 0.1 mm above the anode. The 5% oxygen mixed in argon constricts the arc plasma to some extent and thus raises the arc temperature as well as the plasma flow velocity. © 2019 Chinese Physical Society.
资助项目	Scientific and Technological Research Program of Chongqing Municipal Education Commission, China[KJ1600903] ; Scientific and Technological Research Program of Chongqing Municipal Education Commission, China[KJ1709197]
WOS研究方向	Physics
语种	中文
出版者	Institute of Physics, Chinese Academy of Sciences
WOS记录号	WOS:000484835600029
状态	已发表
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114801]
专题	材料科学与工程学院
通讯作者	Wang Xin-Xin
作者单位	1.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Gansu, Peoples R China 2.Chongqing Univ Technol, Sch Mat Sci & Engn, Chongqing 400054, Peoples R China 3.Chongqing Municipal Engn Res Ctr Higher Educ Inst, Chongqing 400054, Peoples R China 4.State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Wang Xin-Xin,Chi Lu-Xin,Wu Guang-Feng,et al. Numerical simulation of mixture gas arc of Ar-O2[J]. Wuli Xuebao/Acta Physica Sinica,2019,68(17).
APA	Wang Xin-Xin,Chi Lu-Xin,Wu Guang-Feng,Li Chun-Tian,&Fan Ding.(2019).Numerical simulation of mixture gas arc of Ar-O2.Wuli Xuebao/Acta Physica Sinica,68(17).
MLA	Wang Xin-Xin,et al."Numerical simulation of mixture gas arc of Ar-O2".Wuli Xuebao/Acta Physica Sinica 68.17(2019).