Influence of gas flow on argon microwave plasma jet at atmospheric pressure
Influence of gas flow on argon microwave plasma jet at atmospheric pressure
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DOI：
10.1016/j.surfcoat.2011.09.013
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发表时间：
2011-12
影响因子：
5.4
通讯作者：
S. Iio;Kosuke Yanagisawa;C. Uchiyama;Katsuya Teshima;N. Ezumi;T. Ikeda
中科院分区：
文献类型：
--
作者：
S. Iio;Kosuke Yanagisawa;C. Uchiyama;Katsuya Teshima;N. Ezumi;T. Ikeda
多种大气压等离子体射流已被开发并用于广泛的应用，例如表面处理和改性。本研究主要研究2.45GHz微波射频功率放电产生的氩常压微等离子体射流。等离子射流对周围环境非常敏感：压力、温度和气体种类。因此，绝对有必要从流体动力学的角度来理解大气压等离子体射流的性质。因此，本研究重点关注等离子体射流与工作气体之间的相互关系。通过速度测量和快速摄影来评估等离子体射流和工作气体的运动。结果，观察到火炬径向上的不稳定正弦波运动。炬出口下游区域等离子体的平流速度随着供给流量的增加而增大，速度比在0.75~0.87之间。
Many kinds of an atmospheric-pressure plasma jet have been developed and used for widespread applications such as a surface treatment and modified. This study focused on the argon atmospheric-pressure microplasma jet generated by discharging of RF power of 2.45GHz microwave. The plasma jet shows sensitivity to surrounding environment: pressure, temperature and gaseous species. It is therefore absolutely imperative that a nature of atmospheric-pressure plasma jet should be understood from a point of fluid dynamics. This study, therefore, focused on the interrelationship between the plasma jet and the working gas. Motion of the plasma jet and the working gas was evaluated by velocity measurement and fast photography. As a result, the unsteady sinusoidal waving motion in the radial direction of a torch was observed. Advection velocity of the plasma in just downstream region of the torch exit increases with the supplying flow rate, and the velocity ratio is in the range of 0.75–0.87.