Characterization of a steam plasma jet at atmospheric pressure

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	Characterization of a steam plasma jet at atmospheric pressure
	Zhao, P
刊名	plasma sources science & technology
	2012
中文摘要	an atmospheric steam plasma jet generated by an original dc water plasma torch is investigated using electrical and spectroscopic techniques. because it directly uses the water used for cooling electrodes as the plasma-forming gas, the water plasma torch has high thermal efficiency and a compact structure. the operational features of the water plasma torch and the generation of the steam plasma jet are analyzed based on the temporal evolution of voltage, current and steam pressure in the arc chamber. the influence of the output characteristics of the power source, the fluctuation of the arc and current intensity on the unsteadiness of the steam plasma jet is studied. the restrike mode is identified as the fluctuation characteristic of the steam arc, which contributes significantly to the instabilities of the steam plasma jet. in addition, the emission spectroscopic technique is employed to diagnose the steam plasma. the axial distributions of plasma parameters in the steam plasma jet, such as gas temperature, excitation temperature and electron number density, are determined by the diatomic molecule oh fitting method, boltzmann slope method and h-beta stark broadening, respectively. the steam plasma jet at atmospheric pressure is found to be close to the local thermodynamic equilibrium (lte) state by comparing the measured electron density with the threshold value of electron density for the lte state. moreover, based on the assumption of lte, the axial distributions of reactive species in the steam plasma jet are estimated, which indicates that the steam plasma has high chemical activity.
学科主题	等离子体物理与核聚变研究
公开日期	2012-07-09
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn/handle/334002/5752]
专题	合肥物质科学研究院_中科院等离子体物理研究所
推荐引用方式 GB/T 7714	Zhao, P. Characterization of a steam plasma jet at atmospheric pressure[J]. plasma sources science & technology,2012.
APA	Zhao, P.(2012).Characterization of a steam plasma jet at atmospheric pressure.plasma sources science & technology.
MLA	Zhao, P."Characterization of a steam plasma jet at atmospheric pressure".plasma sources science & technology (2012).