Enhanced energy transfer efficiency in a four-electrodes configuration DBD plasma jet

Nascimento, Fellype do; Machida, Munemasa; Kostov, K. G.; Moshkalev, Stanislav; Honda, Roberto Yzumi; Mota, Ronaldo; Nishime, Thalita Mayumi Castaldelli; Castro, Alonso Herman Ricci

doi:10.1140/epjd/e2017-80350-0

Cited by 4 publications

(2 citation statements)

References 28 publications

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“…In a previous work of our group [33], it was demonstrated that the use of a DBD device in a four-electrodes configuration improves the energy efficiency when compared to cases where less electrodes are employed.…”

Section: Introductionmentioning

confidence: 97%

Four-electrodes DBD plasma jet device with additional floating electrode

et al. 2020

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A Dielectric Barrier Discharge (DBD) plasma jet in a four electrodes configuration was investigated in order to improve the discharge parameters, such as, plasma power and rotational and vibrational temperatures of molecular species in the plasma plume. The improvement attempts were made by introducing an auxiliary floating electrode in a form of a metallic pin inside the DBD device. That piece was placed near the bottom of the main device, centered in relation to the four powered electrodes, which were covered with a dielectric material. By using metallic pins with different lengths, it was observed that there were considerable variations of the plasma parameters as a function of the pin length. Two carrier gases were tested: argon and helium. With helium as the working gas, it was found that there is an optimal pin length that maximizes the plasma power and its vibrational temperature. In addition, it was verified that for the pin of optimum length the relative intensity of light emissions from OH and NO species achieved higher values than in other conditions studied.

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Section: Introductionmentioning

confidence: 97%

Four-electrodes DBD plasma jet device with additional floating electrode

et al. 2020

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“…In practical applications, the temperature of the plasma is an important parameter to characterize the state of the plasma jet array. It is well known that N 2 C-B (second positive system) in 360-380 nm is often adopted for rotational and vibrational temperature measurement [35]. Spectroscopic measurement of the N 2 band (360-380 nm) at the plasma contact point while U p-p =4.2 kV is illustrated in figure 10(a).…”

Section: Rotational and Vibrational Temperaturementioning

confidence: 99%

Electrical and optical characteristics of atmospheric helium jet array plasma

Liu¹,

Chen²,

Mo³

et al. 2019

Plasma Sci. Technol.

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In this paper, a honeycomb structure jet array with seven jet units was adopted to generate plasmas. Both the average discharge power and the emission intensity of the main excited species increase with increasing applied voltage. There are three stages of discharge evolution at different applied voltages: initial discharge, uniform discharge and strong coupling discharge. The spatial distribution of the emission intensity of the excited species can be divided into three categories: growth class, weakening class and variation class. The gas temperature along the whole plasma plume at different applied voltages is maintained at around 320 K and can be widely used in heat-labile applications.

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Numerical simulation on electric field intensity and reaction pathway in the He–O2 atmospheric pressure plasma jet

Chen

Liu

et al. 2020

AIP Advances

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In this work, a two-dimensional fluid model of the needle-plane discharge plasma has been built to numerically investigate the spatio-temporal evolution characteristics of the electric field intensity and electric potential as well as generating and consuming reaction pathways of various oxygen species in a He–O2 atmospheric pressure plasma jet. Simulation results have indicated that the region of high electric field intensity moves in the direction of the plane electrode with the formation and propagation of an ionization wave. The region of low electric field intensity exists between the needle electrode and the head of the ionization wave, and its area increases continuously. The obvious voltage drop and local electric field enhancement occur between the head of the ionization wave and the plane electrode. Electron attachment reactions e + O2 → O + O− and e + 2O2 → O2− + O2 produce negative ions O− and O2−. More than 80% of the positive ions O2+ and H2O+ come from Penning ionizations between He* and molecules O2 and H2O. e + O2 → e + O + O(1D) is the main pathway to generate O and O(1D). O(1D) + H2O → 2OH and O + H + H2O → OH + H2O produce 69.3% and 39.2% of OH, respectively. 2O2 + O → O3 + O2 is the key generating reaction of O3.

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Enhanced energy transfer efficiency in a four-electrodes configuration DBD plasma jet

Cited by 4 publications

References 28 publications

Four-electrodes DBD plasma jet device with additional floating electrode

Four-electrodes DBD plasma jet device with additional floating electrode

Electrical and optical characteristics of atmospheric helium jet array plasma

Numerical simulation on electric field intensity and reaction pathway in the He–O2 atmospheric pressure plasma jet

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