Fluid Mechanics of Torch Appearance in Capillary Microplasma Jet
Fluid Mechanics of Torch Appearance in Capillary Microplasma Jet
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DOI：
10.1143/jjap.48.016001
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发表时间：
2009-01
影响因子：
1.5
通讯作者：
Jaegu Choi;Keita Matsuo;Hidekazu Yoshida;S. Hosseini;T. Namihira;S. Katsuki;H. Akiyama
中科院分区：
文献类型：
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作者：
Jaegu Choi;Keita Matsuo;Hidekazu Yoshida;S. Hosseini;T. Namihira;S. Katsuki;H. Akiyama
大气压微等离子体射流与长而细的火炬最近已被用于工业和医疗应用，如局部牙科治疗，毛细血管的内表面处理，微生物的刺激，和局部清洗的半导体器件。最终的焊炬外观在很大程度上取决于电极之间的等离子体和气流，气流也由喷嘴的配置主导。在这项研究中，在直流驱动的毛细管微等离子体射流使用大气压空气火炬外观的机制进行了研究。实验测得的可见火炬长度进行了分析的基础上，使用流体模拟代码的流体力学。利用高速摄像机对等离子体炬的时间演化进行了可视化，给出了炬的长度和传播速度。
Atmospheric-pressure microplasma jets with long and fine torches have recently been used in industrial and medical applications, such as local dental treatment, inner surface treatment of capillaries, stimuli of microorganisms, and local cleaning of semiconductor devices. The final torch appearance is greatly dependent on both the plasma between electrodes and the gas flow that is also dominated by the configuration of the nozzle. In this study, the mechanisms of torch appearance in a dc-driven capillary microplasma jet using atmospheric-pressure air have been investigated. Experimentally measured visible torch lengths are analyzed on the basis of fluid mechanics using a fluid simulation code. The time evolution of the plasma torch is visualized with a high-speed camera, and the length and propagation velocity of the torch are presented.