Discharge Characteristics and Plasma Erosion of Various Dielectric Materials in the Dielectric Barrier Discharges

Kim, Junggil; Kim, Sang-jin; Lee, Youngnam; Kim, In-Tae; Cho, Guangsup

doi:10.3390/app8081294

Cited by 14 publications

(8 citation statements)

References 52 publications

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“…During experimental tests, the discharge power ranged from P = 1.10 W up to 2.0 W, with a supply voltage from V = 7.0 kV to 12 kV. In DBD systems, the power of lightning is influenced by several factors, the most important of which are; frequency of the supply system, supply voltage, dielectric type [10,14], distance between HV and GND electrodes, geometry of electrodes [11][12][13].…”

Section: Resultsmentioning

confidence: 99%

Application of Plasma Actuator with Two Mesh Electrodes to Active Control of Boundary Layer at 50 Hz Power Supply

Gnapowski¹,

Pytka²,

Gnapowski³

et al. 2023

Adv. Sci. Technol. Res. J.

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Numerous studies are conducted to improve the fl ow in the boundary layer to ensure laminar fl ow and in particular to increase fl ight safety. A new solution used to improve the laminar fl ow is the plasma actuator. The classic confi guration of DBD plasma actuators is commonly used with the asymmetric electrode system. The manuscript describes the results of tests with a plasma actuator. Experimental tests were carried out on the built model of the wing with the SD 7003 profi le, a plasma actuator was mounted on the upper surface. In contrast to the commonly used solution with solid tape copper electrodes, the novelty in the described research in the manuscript is the use of a large GND electrode (covering 70% of the upper surface of the wing) and a HV mesh electrode. The use of a plasma actuator on the upper surface of the wing aff ects the air fl ow in the boundary layer as a result of air ionization. The tests were carried out for a supply voltage from V = 7.0 kV to 12 kV and Reynolds number, R e = 87500 to 240000, fl ow velocity during the tests in the tunnel was in the range of U = 5-15 m/s and the angle of attack α = 5-15 degrees. On the basis of the results experimental tests, the percentage change in the lift coeffi cient was calculated for the switched on and off DBD system. The obtained results indicate a maximum 17% increase in the lift coeffi cient for the plasma actuator activated for air fl ow U = 5 m/s and angle of attack α = 5 degrees. In the remaining confi gurations, changes in the lift coeffi cient amounted to 4%.

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Section: Resultsmentioning

confidence: 99%

Application of Plasma Actuator with Two Mesh Electrodes to Active Control of Boundary Layer at 50 Hz Power Supply

Gnapowski¹,

Pytka²,

Gnapowski³

et al. 2023

Adv. Sci. Technol. Res. J.

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“…Irreversible damage to the dielectric could be avoided by choosing non-porous hydrophobic materials that do not become hydrophilic by plasma activation, nor are degraded by plasma exposure. FR4 absorbs 0.5% water by volume at room temperature and RH = 100% [24]; polyimide absorbs approximately twice as much water [30], whereas polypropylene tends to oxidize if heated [31], and polytetrafluoroethylene (PTFE) is degraded by plasma, as are many polymers and polymer coatings. Finally, high quality alumina (Al 2 O 3 ) and aluminum nitride appear to be the best candidates, not only for their dielectric properties and their immunity to moisture absorption, but also for their biological compatibility [32,33], although they are mildly hydrophilic.…”

Section: Dielectric Damagementioning

confidence: 99%

Surface DBD degradation in humid air, and a hybrid surface-volume DBD for robust plasma operation at high humidity

Avino

Howling

Allmen

et al. 2023

J. Phys. D: Appl. Phys.

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Surface dielectric barrier discharge (SDBD) performance deteriorates in humid air, with permanent and/or reversible degradation of its components. Plasma operation in a humid environment is unavoidable when humid air or water-containing materials are treated. Experimental and numerical results indicate that an electrically conductive thin ﬁlm of water is responsible for ohmic dissipation and inhibited plasma ignition at high relative humidity. An alternative hybrid surface-volume DBD design provides more stable and uniform plasma operation in high-humidity atmospheres.

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“…To convert that energy into a heat flux, it is assumed that all of the kinetic energy the ions have as they bombard the surface is dissipated as heat. This is justified by the experimental evidence that air plasmas in contact with an alumina surface show no evidence of sputtering despite extended periods of operation time [42]. Thus, both mechanisms were deemed unlikely to be significant.…”

Section: Dominant Heating Mechanismsmentioning

confidence: 99%

Dominant heating mechanisms in a surface barrier discharge

Gilbart

Dickenson

Walsh

et al. 2021

J. Phys. D: Appl. Phys.

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In computational models of atmospheric pressure surface barrier discharges (SBDs) the role of heating of the dielectric material and the quiescent gas is often neglected, impacting the accuracy of the calculated chemical kinetics. In this contribution, a two-dimensional fluid model of an SBD was developed and experimentally validated to determine the relative contribution of the dominant heat transfer mechanisms and to quantify the impact of discharge heating on the resultant chemistry. Three heating mechanisms were examined, including electron heating of the background gas due to inelastic collisions, ion bombardment of the dielectric surface and dielectric heating by the time-varying electric field. It was shown that electron heating of the background gas was not significant enough to account for the experimentally observed increase in temperature of the dielectric material, despite being the dominant heating mechanism of the gas close to the electrode. Dielectric heating was ruled out as the frequency response of typical dielectric materials used in SBD devices does not overlap with the experimentally observed power spectrum of an SBD excited at kHz frequencies. The ionic flux heating was found to be the dominant heating mechanism of the dielectric material and the downstream flow driven by the SBD. The largest impact of plasma heating on discharge chemistry was found in reactive nitrogen species (RNS) production, where the densities of RNSs increased when an appropriate treatment of heating was adopted. This had a marked effect on the discharge chemistry, with the concentration of NO2 increasing by almost 50% compared to the idealized constant temperature case.

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Discharge Characteristics and Plasma Erosion of Various Dielectric Materials in the Dielectric Barrier Discharges

Cited by 14 publications

References 52 publications

Application of Plasma Actuator with Two Mesh Electrodes to Active Control of Boundary Layer at 50 Hz Power Supply

Application of Plasma Actuator with Two Mesh Electrodes to Active Control of Boundary Layer at 50 Hz Power Supply

Surface DBD degradation in humid air, and a hybrid surface-volume DBD for robust plasma operation at high humidity

Dominant heating mechanisms in a surface barrier discharge

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