Modeling Study on the Characteristics of Laminar and Turbulent Argon Plasma Jets Impinging Normally upon a Flat Plate in Ambient Air

doi:10.1016/j.ijheatmasstransfer.2006.07.002

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	Modeling Study on the Characteristics of Laminar and Turbulent Argon Plasma Jets Impinging Normally upon a Flat Plate in Ambient Air
	Wang HX(王海兴); Chen X(陈熙); Cheng K(程凯); Chen, X (reprint author), Tsing Hua Univ, Dept Engn Mech, Beijing 100084, Peoples R China.
发表期刊	International Journal of Heat and Mass Transfer
	2007
卷号	50 期号:3-4 页码:734-745
ISSN	0017-9310
摘要	Modeling study is performed to compare the flow and heat transfer characteristics of laminar and turbulent argon thermal-plasma jets impinging normally upon a flat plate in ambient air. The combined-diffusion-coefficient method and the turbulence-enhanced combined-diffusion-coefficient method are employed to treat the diffusion of argon in the argon-air mixture for the laminar and the turbulent cases, respectively. Modeling results presented include the flow, temperature and argon concentration fields, the air mass flow-rates entrained into the impinging plasma jets, and the distributions of the heat flux density on the plate surface. It is found that the formation of a radial wall jet on the plate surface appreciably enhances the mass flow rate of the ambient air entrained into the laminar or turbulent plasma impinging-jet. When the plate standoff distance is comparatively small, there exists a significant difference between the laminar and turbulent plasma impinging-jets in their flow fields due to the occurrence of a large closed recirculation vortex in the turbulent plasma impinging-jet, and no appreciable difference is found between the two types of jets in their maximum values and distributions of the heat flux density at the plate surface. At larger plate standoff distances, the effect of the plate on the jet flow fields only appears in the region near the plate, and the axial decaying-rates of the plasma temperature, axial velocity and argon mass fraction along the axis of the laminar plasma impinging-jet become appreciably less than their turbulent counterparts.
学科领域	力学
DOI	10.1016/j.ijheatmasstransfer.2006.07.002
收录类别	SCI
语种	英语
WOS记录号	WOS:000243776400030
WOS研究方向	Thermodynamics ; Engineering ; Mechanics
WOS类目	Thermodynamics ; Engineering, Mechanical ; Mechanics
引用统计	被引频次：11[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/16062
专题	力学所知识产出(1956-2008)
通讯作者	Chen, X (reprint author), Tsing Hua Univ, Dept Engn Mech, Beijing 100084, Peoples R China.
推荐引用方式 GB/T 7714	Wang HX,Chen X,Cheng K,et al. Modeling Study on the Characteristics of Laminar and Turbulent Argon Plasma Jets Impinging Normally upon a Flat Plate in Ambient Air[J]. International Journal of Heat and Mass Transfer,2007,50,3-4,:734-745.
APA	王海兴,陈熙,程凯,&Chen, X .(2007).Modeling Study on the Characteristics of Laminar and Turbulent Argon Plasma Jets Impinging Normally upon a Flat Plate in Ambient Air.International Journal of Heat and Mass Transfer,50(3-4),734-745.
MLA	王海兴,et al."Modeling Study on the Characteristics of Laminar and Turbulent Argon Plasma Jets Impinging Normally upon a Flat Plate in Ambient Air".International Journal of Heat and Mass Transfer 50.3-4(2007):734-745.

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