Ar/O<sub>2</sub>和Ar/H<sub>2</sub>O中大气压等离子体射流放电特性的比较

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Abstract In order to compare characteristics of atmospheric pressure jet(APPJ) plasmas produced in Ar/O₂ mixtures and Ar/H₂O mixtures with the same contents of oxygen and water vapor,the effects of Ar/O₂and Ar/H₂O mixtures on discharge characteristics and evolutions of APPJ are studied by means of voltage and current waveforms,Lissajous figures,light-emission pictures,and optical emission spectra. The main discharge parameters such as discharge power,transported charges,electronic excitation temperature,molecular vibrational temperature,and molecular rotational temperature are calculated. The changing tendencies of these parameters with applied voltage are studied,and the experimental results are explained. Results show that two kinds of APPJs include three stages: corona discharge,dielectric barrier discharge and jet discharge formation. For two kinds of APPJs,the jet length increases with the increase of applied voltage. The APPJs in Ar/O₂ and Ar/H₂O plasmas are a typical non-thermal one with gas temperature in the range of 300~650K,in which the main species are OH,N₂,Ar and a little O. In the range of 7~9.5kV,Ar/H₂O plasma jet spectral intensity is higher than that of Ar/O₂. Through the electronic excitation temperature and molecular rotation temperature calculation,it can be found that the electronic temperature difference under the conditions of argon oxygen and argon water is weak,but gas temperature is lower in case of argon water,which indicates that Ar/H₂O plasma jet is better for surface treatment of heat sensitive material.

Key words： Atmospheric pressure plasma jet(APPJ) discharge characteristics discharge parameters optical emission spectra

Received: 22 June 2013 Published: 22 January 2015

PACS:	TM89
	TM315

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	Zhou Yixiao
	Fang Zhi
	Shao Tao

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Zhou Yixiao,Fang Zhi,Shao Tao. Comparison of Discharge Characteristics of Atmospheric Pressure Plasma Jet in Ar/O₂ and Ar/H₂O Mixtures[J]. Transactions of China Electrotechnical Society, 2014, 29(11): 229-238.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I11/229

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