文章摘要
大气压氧气中稳定形态气-液放电等离子体特性研究
Study of Characters for Atmospheric Gas-Liquid Discharge Oxygen Plasma
投稿时间:2018-04-11  修订日期:2018-05-24
DOI:
中文关键词: 气液放电  氧等离子体  电容  模式转化  电子密度  
英文关键词: gas-liquid discharge  oxygen plasma  capacitor  mode transition  temperature
基金项目:国家自然科学基金项目,国家重点研发发展计划
作者单位E-mail
冯静 大连理工大学 ziputaofeng@mail.dlut.edu.cn 
杨德正 大连理工大学 yangdz@dlut.edu.cn 
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中文摘要:
      本文通过在放电回路中连接电容控制放电电荷数目并得到稳定的氧等离子体。利用研究电压电流波形和放电图像的变化分析了放电模式在不同应用电压下的转化过程。通过对等离子体发射光谱的研究,计算了各种活性物种的发射光谱强度,模拟了等离子体气体温度,振动温度的变化过程。结果表明:随着应用电压的增加,等离子体放电模式在电压正半周从流光放电转化为辉光放电最后转化为弧光放电,在电压负半周从电晕放电转化为弧光放电。在放电回路中加入电容可以限制单次放电的电荷数目提高放电的稳定性。与放电模式的转化相对应,等离子体的气体温度先增加后不变。
英文摘要:
      In this paper, a suitable capacitor was employed to quantify the charge number and generate a stable diffusion oxygen plasma. Dynamic evolution of electrical characteristics and discharge images were measured to investigate the discharge modes and their transitions when the discharge parameter of applied voltage was changed. The plasma gas temperature, vibrational temperature and emission intensity of excited active species was calculated by optical emission spectra. It is found that an obvious transition from streamer mode to glow mode and then to arc mode plasma in a single voltage positive half cycle and another mode transition from corona to arc in negative generate with increasing of applied voltage. A capacitor is added in electric circuit to regulate the releasing quantity of electron to improve the discharge stability. Furthermore, corresponding with the transitions of discharge modes, the gas temperature increased first and then remained stable with the increasing applied voltage.
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