Formation of reactive species in gliding arc discharges with liquid water

Burlică, Radu; Kirkpatrick, Mike; Locke, Bruce R.

doi:10.1016/j.elstat.2004.12.007

Cited by 297 publications

(209 citation statements)

References 22 publications

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“…Several nonthermal plasma generators display higher levels of hydroxyl radicals, compared with non-water vapor plasma discharges, when supplied with water vapor [18,19,25]. Alteration of the amount of oxygen in the starting plasma, gaseous medium has been shown to affect the amount of nitrogen oxide during association with nitrogen.…”

Section: Plasma Spectra Characteristicsmentioning

confidence: 99%

Characterization, Properties and Applications of Nonthermal Plasma: A Novel Pulsed-Based Option

Ferrell¹,

Aleks²,

Galov³

et al. 2013

J Biotechnol Biomaterial

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The glow discharge from a novel spark-based nonthermal plasma generator is described and characterized using spectrophotometry, radiometry and gas detectors. Spectral information identified ultraviolet radiation within the plasma discharge. High levels of reactive oxygen and nitrogenous species were also detected within the analyzed plasma. The plasma discharge is found to have a significant germicidal effect on Gram-positive bacteria, independent of temperature increase. The ultraviolet radiation and ionized gaseous species are found to contribute to this observed effect, synergistically. Plasma filtration reduced germicidal survivability significantly. The liquid environment in which bacterial cells were exposed to the nonthermal plasma also was important, when determining the efficacy of nonthermal plasma, as a germicidal agent. Staphylococcus aureus cultures exposed to nonthermal plasma for two minutes within low nutrient sources, such as water or phosphate-buffered saline, had very low survival. Cultures exposed to the same plasma interval in nutrient rich liquids tolerated the plasma exposure better, and survived at higher numbers. This plasma discharge is highly bactericidal, due to the high concentrations of known antimicrobial agents, but its effectiveness is subject to a synergistic effect, that depends upon the surrounding environment.

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Section: Plasma Spectra Characteristicsmentioning

confidence: 99%

Characterization, Properties and Applications of Nonthermal Plasma: A Novel Pulsed-Based Option

Ferrell¹,

Aleks²,

Galov³

et al. 2013

J Biotechnol Biomaterial

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“…During the past decades gliding arc discharges have been widely used in combustion enhancement [5][6][7], gas conversion and decomposition [8][9][10][11], bacterial inactivation [12,13], surface treatment [14,15] and pollution control [16][17][18]. Many of these applications rely on the formation of reactive species that can increase chemical reaction rates [19,20]. Reactive species, such as free radicals, excited species and free electrons, can be effectively produced in non-thermal plasmas [21], which are characterized by different translational, rotational, vibrational and electron temperatures.…”

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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“…5,6 Such gliding arc discharges have been widely applied to pollution control, 7-11 surface treatment, 1,12 sterilization, 13 and combustion enhancement. 14 Extensive studies have been performed on the dynamics, [15][16][17][18] physical characteristics, [19][20][21][22][23][24][25][26][27][28] and chemical mechanisms [29][30][31] involved in gliding arc discharges. Phenomenological models 21,[32][33][34] were developed to explain the discharge behavior based on accurate measurements of several important parameters, including the slip velocityṼ S (it stands for the relative velocity between the plasma columnṼ C and the gas flowṼ F , and its magnitude is jṼ S j ¼ jṼ C ÀṼ F j), and the length of the plasma column.…”

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confidence: 99%

Measurements of 3D slip velocities and plasma column lengths of a gliding arc discharge

Zhu

Gao

Ehn

et al. 2015

Applied Physics Letters

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A non-thermal gliding arc discharge was generated at atmospheric pressure in an air flow. The dynamics of the plasma column and tracer particles were recorded using two synchronized high-speed cameras. Whereas the data analysis for such systems has previously been performed in 2D (analyzing the single camera image), we provide here a 3D data analysis that includes 3D reconstructions of the plasma column and 3D particle tracking velocimetry based on discrete tomography methods. The 3D analysis, in particular, the determination of the 3D slip velocity between the plasma column and the gas flow, gives more realistic insight into the convection cooling process. Additionally, with the determination of the 3D slip velocity and the 3D length of the plasma column, we give more accurate estimates for the drag force, the electric field strength, the power per unit length, and the radius of the conducting zone of the plasma column.

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Formation of reactive species in gliding arc discharges with liquid water

Cited by 297 publications

References 22 publications

Characterization, Properties and Applications of Nonthermal Plasma: A Novel Pulsed-Based Option

Characterization, Properties and Applications of Nonthermal Plasma: A Novel Pulsed-Based Option

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

Measurements of 3D slip velocities and plasma column lengths of a gliding arc discharge

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