Bending and turbulent enhancement phenomena of neutral gas flow containing an atmospheric pressure plasma by applying external electric fields measured by schlieren optical method

• Hiromasa Yamada

• Yusuke Yamagishi

• Hajime Sakakita

• Syuichiro Tsunoda

• Jiro Kasahara

• Masanori Fujiwara

• Susumu Kato

• Hirotomo Itagaki

• Jaeho Kim

• Satoru Kiyama

• Yutaka Fujiwara

• Yuzuru Ikehara

• Sanae Ikehara

• Hayao Nakanishi

• Nobuyuki Shimizu

Abstract

To understand the mechanism of turbulent enhancement phenomena of a neutral gas flow containing plasma ejected from the nozzle of plasma equipment, the schlieren optical method was performed to visualize the neutral gas behavior. It was confirmed that the turbulent starting point became closer to the nozzle exit, as the amplitude of discharge voltage (electric field) increased. To study the effect of electric field on turbulent enhancement, two sets of external electrodes were arranged in parallel, and the gas from the nozzle was allowed to flow between the upper and lower electrodes. It was found that the neutral gas flow was bent, and the bending angle increased as the amplitude of the external electric field increased. The results obtained using a simple model analysis roughly coincide with experimental data. These results indicate that momentum transport from drifted ions induced by the electric field to neutral particles is an important factor that enhances turbulence.

Journal

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 55 (1S), 01AB08-, 2015-12-18

  IOP Publishing

Keywords

• General Physics and Astronomy
• General Engineering

Details

• CRID: 1360003449890280832
• NII Article ID: 210000145948
• DOI: 10.7567/jjap.55.01ab08
• ISSN: 13474065
• ISSN: 00214922
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.55.01AB08
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.55.01AB08/pdf
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