Influence of gas flow on argon microwave plasma jet at atmospheric pressure

SURFACE & COATINGS TECHNOLOGY

卷:206

Article

Iio, Shouichiro¹  Yanagisawa, Kosuke¹  Uchiyama, Chizuru¹  Teshima, Katsuya¹  Ezumi, Naomichi²  Ikeda, Toshihiko¹ 

[1] Shinshu Univ, Dept Environm Sci & Technol, Nagano 3808553, Japan

[2] Nagano Natl Coll Technol, Nagano 3818550, Japan

关键词: Plasma jet;    Atmospheric pressure;    Microwave discharge;    Argon;    Flow visualization;    Velocity measurement;   

DOI  :  10.1016/j.surfcoat.2011.09.013

来源: Elsevier

【 摘 要 】

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 m jet generated by discharging of RF power of 2.45 GHz 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. (C) 2011 Elsevier B.V. All rights reserved.

【 授权许可】

Free