Gravity effects on a gliding arc in four noble gases: from normal to hypergravity

Potočňáková, Lucia; Šperka, Jiří; Zikán, Petr; Loon, Jack J. W. A. van; Beckers, JL Jozef; Kudrle, Vít

doi:10.1088/0963-0252/24/2/022002

Cited by 6 publications

(9 citation statements)

References 18 publications

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“…Substantial progress in studying gliding arc discharges has been achieved, including transient discharge processes [30,31], electrical characteristics [32,33], hypergravity effects [34,35] and species distributions [36][37][38], as well as the rotational and vibrational temperatures of gliding arc discharges [25][26][27][28]. However, the translational temperature of the gliding arc discharge has not been directly measured yet up to now.…”

Section: Introductionmentioning

confidence: 99%

Translational, rotational, vibrational and electron temperatures of a gliding arc discharge

et al. 2017

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Abstract:Translational, rotational, vibrational and electron temperatures of a gliding arc discharge in atmospheric pressure air were experimentally investigated using in situ, nonintrusive optical diagnostic techniques. The gliding arc discharge was driven by a 35 kHz alternating current (AC) power source and operated in a glow-type regime. The twodimensional distribution of the translational temperature (T t ) of the gliding arc discharge was determined using planar laser-induced Rayleigh scattering. The rotational and vibrational temperatures were obtained by simulating the experimental spectra. The OH A-X (0, 0) band was used to simulate the rotational temperature (T r ) of the gliding arc discharge whereas the NO A-X (1, 0) and (0, 1) bands were used to determine its vibrational temperature (T v ). The instantaneous reduced electric field strength E/N was obtained by simultaneously measuring the instantaneous length of the plasma column, the discharge voltage and the translational temperature, from which the electron temperature (T e ) of the gliding arc discharge was estimated. The uncertainties of the translational, rotational, vibrational and electron temperatures were analyzed. The relations of these four different temperatures (T e >T v >T r >T t ) suggest a high-degree non-equilibrium state of the gliding arc discharge. Phys. 79(5), 2245-2250 (1996). 3. A. Czernichowski, "Gliding arc -applications to engineering and environment control," Pure Appl. Chem.

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Section: Introductionmentioning

confidence: 99%

Translational, rotational, vibrational and electron temperatures of a gliding arc discharge

et al. 2017

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“…The situation significantly changes when increasing the gas flow rate to a higher value (1000 sccm), as is seen in figure 6(b). If the detailed evolution depicted by red symbols was ignored and the attention was only paid to the starting and ending points (linear blue line), the increase in linear speed (0.39 m s −1 would still be observed, just as expected [22,37] for an increased flow rate. However, in reality, the upwards motion of the plasma channel is disrupted by several drops in height and the piece-wise average speed (green colour in figure 6(b)) of the plasma channel in each segment of the evolution is higher than the overall linear approximation of the average speed.…”

Section: Evolution Of the Plasma Channel During One Glide Periodmentioning

confidence: 75%

“…Recently, we performed several experiments [37][38][39][40] with gliding arc discharge at the centrifuge, which simulated the hypergravity conditions up to 18g and thus allowed us to study gliding arc in buoyancy dominated regime. The first results proved the strong influence of increased gravity on the plasma channel, such as higher frequency of gliding and lower maximum height reached by plasma.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of gliding arc plasma channel motion: buoyancy and gas flow phenomena under normal and hypergravity conditions

Potočňáková

Šperka

Zikán

et al. 2017

Plasma Sources Sci. Technol.

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“…A classical 2D gliding arc reactor consists of two knifeshaped electrodes. The arc evolution in 2D GAD has been widely reported [21][22][23][24][25][26][27][28]. Normally, it operates under restrike mode governed by the ignition-gliding-extinction mechanism.…”

Section: Introductionmentioning

confidence: 99%

Caudal autotomy and regeneration of arc in a 3D gliding arc discharge plasma

Zhang¹,

Li²,

Li³

et al. 2021

J. Phys. D: Appl. Phys.

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To gain a better understanding of the mechanism governing arc dynamics in 3D gliding arc discharge (GAD) plasma, the spatio-temporal evolution of GAD was investigated in a reverse vortex flow by a novel reactor with ring (powered electrode, PE) and truncated cone (ground electrode, GE) electrodes. A newly underlying mechanism governing arc evolution in 3D GAD was gained with combination of flow field simulation, synchronous electrical characteristics, intensified charge coupled device images and high-speed photos. The spatio-temporal analysis indicates that, being different from the well-known ignition–gliding–extinction mechanism occurring in traditional GAD, the PE arc root glides continuously in the 3D GAD, but the GE arc root features jumps from the end of the gliding path to the beginning of the next one. By means of the jumping, the arc auto-sheds the caudal part of the arc and a new arc tail is simultaneously generated, rather than rebuilding a new arc channel back to the shortest electrode gap. With this special behavior of caudal autotomy and regeneration, the main part of the arc remains for each jump. This new insight improves the understanding of the discharge mechanism governing arc evolution in 3D GAD and provides a reference for optimization design of gliding arc plasma in a vortex flow.

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Gravity effects on a gliding arc in four noble gases: from normal to hypergravity

Cited by 6 publications

References 18 publications

Translational, rotational, vibrational and electron temperatures of a gliding arc discharge

Translational, rotational, vibrational and electron temperatures of a gliding arc discharge

Experimental study of gliding arc plasma channel motion: buoyancy and gas flow phenomena under normal and hypergravity conditions

Caudal autotomy and regeneration of arc in a 3D gliding arc discharge plasma

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