Characteristics of helium DC plasma jets at atmospheric pressure with multiple cathodes

HFCAS OpenIR

	Characteristics of helium DC plasma jets at atmospheric pressure with multiple cathodes
其他题名	Characteristics of helium DC plasma jets at atmospheric pressure with multiple cathodes
	Wang Cheng 1; Zhang Zelong 1; Cui Haichao 1; Xia Weiluo2 ; Xia Weidong 1
	2017
发表期刊	Chinese Physics. B
ISSN	1674-1056
摘要	A novel DC plasma torch with multiple cathodes is developed for generating laminar, transitional and turbulent plasma jets. The jet's characteristics, including jet appearance, voltage fluctuation, thermal efficiency, specific enthalpy, and distributions of temperature, pressure, and velocity, are experimentally investigated. The results show that as the gas flow rate increases, the plasma jet transforms first from the laminar state to the transitional state and second to the turbulent state. Compared with the transitional/turbulent jet, the laminar jet possesses not only a better stability and a longer hightemperature zone but also a higher average/core temperature and a higher specific enthalpy at the nozzle's outlet. With the change of jet states from the laminar to the turbulent flow, the core pressure and velocity at the nozzle's outlet increase, while the decaying rates of temperature/pressure/velocity along the jet's axial direction increase sharply. Furthermore, applications of laminar, transitional and turbulent jets for zirconia spray coating are described. The test results indicate that the long laminar jet is favorable for the deposition of a high-quality coating because the powder particles injected into the laminar jet may have better heating and lower kinetic energy.
其他摘要	A novel DC plasma torch with multiple cathodes is developed for generating laminar, transitional and turbulent plasma jets. The jet's characteristics, including jet appearance, voltage fluctuation, thermal efficiency, specific enthalpy, and distributions of temperature, pressure, and velocity, are experimentally investigated. The results show that as the gas flow rate increases, the plasma jet transforms first from the laminar state to the transitional state and second to the turbulent state. Compared with the transitional/turbulent jet, the laminar jet possesses not only a better stability and a longer hightemperature zone but also a higher average/core temperature and a higher specific enthalpy at the nozzle's outlet. With the change of jet states from the laminar to the turbulent flow, the core pressure and velocity at the nozzle's outlet increase, while the decaying rates of temperature/pressure/velocity along the jet's axial direction increase sharply. Furthermore, applications of laminar, transitional and turbulent jets for zirconia spray coating are described. The test results indicate that the long laminar jet is favorable for the deposition of a high-quality coating because the powder particles injected into the laminar jet may have better heating and lower kinetic energy.
关键词	arc plasma jet jet appearance jet parameters distribution zirconia coating
收录类别	CSCD
语种	英语
CSCD记录号	CSCD:6072393
引用统计	被引频次：6[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/95201
专题	中国科学院合肥物质科学研究院
作者单位	1.Department of Thermal Science and Energy Engineering, University of Science and Technology of China 2.Department of Thermal Science and Energy Engineering, University of Science and Technology of China 3.Department of Thermal Science and Energy Engineering, University of Science and Technology of China 4.Hefei Institutes of Physical Science, Chinese Academy of Sciences 5.Department of Thermal Science and Energy Engineering, University of Science and Technology of China
推荐引用方式 GB/T 7714	Wang Cheng,Zhang Zelong,Cui Haichao,et al. Characteristics of helium DC plasma jets at atmospheric pressure with multiple cathodes[J]. Chinese Physics. B,2017,26.
APA	Wang Cheng,Zhang Zelong,Cui Haichao,Xia Weiluo,&Xia Weidong.(2017).Characteristics of helium DC plasma jets at atmospheric pressure with multiple cathodes.Chinese Physics. B,26.
MLA	Wang Cheng,et al."Characteristics of helium DC plasma jets at atmospheric pressure with multiple cathodes".Chinese Physics. B 26(2017).