Comparison of Laminar and Turbulent Thermal Plasma Jet Characteristics - A Modeling Study

doi:10.1007/s11090-006-9006-6

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	Comparison of Laminar and Turbulent Thermal Plasma Jet Characteristics - A Modeling Study
	Cheng K; Chen X; Pan WX(潘文霞); Chen, X (reprint author), Tsing Hua Univ, Dept Engn Mech, Beijing 100084, Peoples R China.
发表期刊	Plasma Chemistry and Plasma Processing
	2006
卷号	26 期号:3 页码:211-235
ISSN	0272-4324
摘要	Modeling results are presented to compare the characteristics of laminar and turbulent argon thermal plasma jets issuing into ambient air. The combined-diffusion-coefficient method and the turbulence-enhanced combined-diffusion-coefficient method are employed to treat the diffusion of ambient air into the laminar and turbulent argon plasma jects, respectively. It is shown that since only the molecular diffusion mechanism is involved in the laminar plasma jet, the mass flow rate of ambient air entrained into the laminar plasma jet is comparatively small and less dependent on the jet inlet velocity. On the other hand, since turbulent transport mechanism is dominant in the turbulent plasma jet, the entrainment rate of ambient air into the turbulent plasma jet is about one order of magnitude larger and almost directly proportional to the jet inlet velocity. As a result, the characteristics of laminar plasma jets are quite different from those of turbulent plasma jets. The length of the high-temperature region of the laminar plasma jet ismuch longer and increases notably with increasing jet inlet velocity or inlet temperature, while the length of the high-temperature region of the turbulent plasma jet is short and less influenced by the jet inlet velocity or inlet temperature. The predicted results are reasonably consistent with available experimental observation by using a DC arc plasma torch at arc currents 80–250A and argon flow rates (1.8–7.0)×10−4 kg/s.
学科领域	力学
DOI	10.1007/s11090-006-9006-6
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000237325800002
关键词[WOS]	CARRIER-GAS ; ATMOSPHERIC-PRESSURE ; HIGH-VELOCITY ; AMBIENT AIR ; ENTRAINMENT ; LONG ; GENERATION ; DIFFUSION ; INJECTION ; PARTICLE
WOS研究方向	Engineering ; Physics
WOS类目	Engineering, Chemical ; Physics, Applied ; Physics, Fluids & Plasmas
引用统计	被引频次：31[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/311007/15346
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	Cheng K,Chen X,Pan WX,et al. Comparison of Laminar and Turbulent Thermal Plasma Jet Characteristics - A Modeling Study[J]. Plasma Chemistry and Plasma Processing,2006,26,3,:211-235.
APA	Cheng K,Chen X,潘文霞,&Chen, X .(2006).Comparison of Laminar and Turbulent Thermal Plasma Jet Characteristics - A Modeling Study.Plasma Chemistry and Plasma Processing,26(3),211-235.
MLA	Cheng K,et al."Comparison of Laminar and Turbulent Thermal Plasma Jet Characteristics - A Modeling Study".Plasma Chemistry and Plasma Processing 26.3(2006):211-235.

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