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Author Qaisrani, M. Hasnain ♦ Xian, Yubin ♦ Li, Congyun ♦ Pei, Xuekai ♦ Ghasemi, Maede ♦ Lu, Xinpei
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION TECHNOLOGY ♦ ATMOSPHERIC PRESSURE ♦ CAMERAS ♦ CURTAINS ♦ ELECTRIC POTENTIAL ♦ FLOW RATE ♦ GAS FLOW ♦ LAMINAR FLOW ♦ PHOTOGRAPHY ♦ PLASMA JETS ♦ PLASMA PRESSURE ♦ REDUCTION ♦ SHIELDING ♦ STEADY-STATE CONDITIONS ♦ SWITCHES ♦ TURBULENCE ♦ VELOCITY
Abstract In this paper, first, steady state of the plasma jet at different operating conditions is investigated through Schlieren photography with and without applying shielding gas. Second, the dynamic process for the plasma impacting on the gas flow field is studied. When the discharge is ignited, reduction in laminar flow occurs. However, when the gas flow rate is too low or too high, this phenomenon is not obvious. What is more, both frequency and voltage have significant impact on the effect of plasma on the gas flow, but the former is more significant. Shielding gas provides a curtain for plasma to propagate further. High speed camera along with Schlieren photography is utilized to study the impact of plasma on the gas flow when plasma is switched on and off. The transition of the gas flow from laminar to turbulent or vice versa happens right after the turbulent front. It is concluded that appearance and propagation of turbulence front is responsible for the transition of the flow state.
ISSN 1070664X
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-06-15
Publisher Place United States
Journal Physics of Plasmas
Volume Number 23
Issue Number 6


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