Three-Dimensional Modeling of Heat Transfer and Fluid Flow in Laminar-Plasma Material Re-Melting Processing

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	Three-Dimensional Modeling of Heat Transfer and Fluid Flow in Laminar-Plasma Material Re-Melting Processing
	Wang HX; Cheng K; Chen X; Pan WX(潘文霞)
刊名	International Journal of Heat and Mass Transfer
	2006
通讯作者邮箱	cx-dem@mail.tsinghua.edu.cn
卷号	49 期号:13 页码:2254-2264
ISSN号	0017-9310
通讯作者	Chen, X (reprint author), Tsing Hua Univ, Dept Engn Mech, Engn Thermophys Div, Beijing 100084, Peoples R China.
中文摘要	Modeling study is performed concerning the heat transfer and fluid flow for a laminar argon plasma jet impinging normally upon a flat workpiece exposed to the ambient air. The diffusion of the air into the plasma jet is handled by using the combined-diffusion-coefficient approach. The heat flux density and jet shear stress distributions at the workpiece surface obtained from the plasma jet modeling are then used to study the re-melting process of a carbon steel workpiece. Besides the heat conduction within the workpiece, the effects of the plasma-jet inlet parameters (temperature and velocity), workpiece moving speed, Marangoni convection, natural convection etc. on the re-melting process are considered. The modeling results demonstrate that the shapes and sizes of the molten pool in the workpiece are influenced appreciably by the plasma-jet inlet parameters, workpiece moving speed and Marangoni convection. The jet shear stress manifests its effect at higher plasma-jet inlet velocities, while the natural convection effect can be ignored. The modeling results of the molten pool sizes agree reasonably with available experimental data.
学科主题	力学
类目[WOS]	Thermodynamics ; Engineering, Mechanical ; Mechanics
研究领域[WOS]	Thermodynamics ; Engineering ; Mechanics
关键词[WOS]	ATMOSPHERIC-PRESSURE ; JETS ; LONG ; GAS
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000238269800022
公开日期	2007-06-15 ; 2007-12-05 ; 2009-06-23
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/16541]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Wang HX,Cheng K,Chen X,et al. Three-Dimensional Modeling of Heat Transfer and Fluid Flow in Laminar-Plasma Material Re-Melting Processing[J]. International Journal of Heat and Mass Transfer,2006,49(13):2254-2264.
APA	Wang HX,Cheng K,Chen X,&潘文霞.(2006).Three-Dimensional Modeling of Heat Transfer and Fluid Flow in Laminar-Plasma Material Re-Melting Processing.International Journal of Heat and Mass Transfer,49(13),2254-2264.
MLA	Wang HX,et al."Three-Dimensional Modeling of Heat Transfer and Fluid Flow in Laminar-Plasma Material Re-Melting Processing".International Journal of Heat and Mass Transfer 49.13(2006):2254-2264.