Laminar-to-Turbulent Transition of a DC Helium/Oxygen (2%) Plasma Microjet

Author

Wang, Ruixue ; Zhu, WeiDong ; Re, Justin Lo ; Zhang, Jue ; Fang, Jing ; Lopez, Jose L.

Author_Institution

Acad. for Adv. Interdiscipl. Studies, Peking Univ., Beijing, China

Volume

39

Issue

11

fYear

2011

Firstpage

2374

Lastpage

2375

Abstract

A direct current plasma microjet is generated from a microhollow cathode discharge device in air with helium and oxygen (2%) as working gas. With the increase of the gas flow rate, a laminar-to-turbulent transition was found at a flow rate between 2.5 and 3.0 slm. The corresponding critical Reynolds number is calculated to be between 639 and 768. A stable bifurcation of the jet tip is observed with a transition flow when a nozzle with a 400- μm diameter opening is used.

Keywords

bifurcation; glow discharges; helium; laminar to turbulent transitions; oxygen; plasma jets; plasma turbulence; DC helium-oxygen plasma microjet; He-O₂; critical Reynolds number; direct current plasma microjet; gas flow rate; jet tip; laminar-to-turbulent transition; microhollow cathode discharge device; nozzle; size 400 mum; stable bifurcation; transition flow; working gas; Bifurcation; Copper; Electrodes; Electron tubes; Helium; Plasmas; Microhollow cathode; Reynolds number; plasma jet;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2011.2139230

Filename

5762639