Numerical investigation of nanosecond pulsed discharge in air at above-atmospheric pressures

Zhang, Anqi; Scarcelli, Riccardo; Wallner, Thomas; Breden, Douglas; Karpatne, Anand; Raja, Laxminarayan L.; Ekoto, Isaac; Wolk, Benjamin

doi:10.1088/1361-6463/aad262

Cited by 18 publications

(17 citation statements)

References 37 publications

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“…This discharge process is different from that of the pin-to-plate electrode. The appearance of the negative streamer in the pinto-pin electrode was ascribed to the sharp included angle of the cathode electrode, which indicates that a small curvature of the ground electrode can affect the generation of discharge streamers [17,18]. Since the electrodes in wire-to-wire electrode both have a small radius of curvature and possess long discharge distance, the discharge mechanism may differ from the classical pulsed streamer discharge process studied above and is still not clear yet.…”

Section: Introductionmentioning

confidence: 93%

“…In their study, the primary streamer and the secondary streamer generated from the anode were also detected in a wire-to-plate electrode. However, in a numerical study of positive pulsed pin-to-pin electrode configuration with 5 mm gap, the simulation results showed that the streamer propagation process was quite different [17]. They have shown that the early stage of the discharge involves positive streamer and negative streamer propagating from the anode and the cathode, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Spatiotemporal analysis of streamer discharge in a wire-to-wire reactor with positive nanosecond pulse supply

Liu¹,

Li²,

Peng³

et al. 2020

J. Phys. D: Appl. Phys.

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The spatial and temporal distribution of the discharge streamers in positive pulsed wire-to-wire electrode configuration in atmospheric air is investigated by an electrical-optical diagnostic system. Time-resolved ICCD images show that the discharge streamers in wire-to-wire electrode develop in three phases: the primary streamer, the secondary positive streamer, and the secondary negative streamer. It is observed that the evolution of discharge streamers is strongly influenced by the amplitude of the applied voltage. The optical emission spectroscopy measurement of hydroxyl radical OH indicates that the OH is mainly generated in the secondary positive streamer near the anode region. But in the region near the cathode the emission of OH radicals can also be detected due to the secondary negative streamer. The influences of rise time, fall time and pulse duration on streamer dynamics and the subsequent radical production are observed. It is shown that the average propagation velocity of the primary streamer decreases with the increase of the rise time, while the variation of pulse width and pulse duration parameters have little effect on that of the primary streamer. The response surface methodology based on Box–Behnken design model is implemented to evaluate the contribution of the three critical pulse parameters on ozone production. The results of the response surface quadratic model show that the pulse rise time plays the most prominent role in the generation of ozone among the three pulse parameters of rise time, fall time and pulse duration.

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Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Spatiotemporal analysis of streamer discharge in a wire-to-wire reactor with positive nanosecond pulse supply

Liu¹,

Li²,

Peng³

et al. 2020

J. Phys. D: Appl. Phys.

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“…The spatial–temporal evolution of two counter‐propagating surface streamers is shown in Figures 10 and 11. Figure 11 is a 2D contour plot [51] for the date from a line above the dielectric surface with 0.5 mm. The x ‐axis is the time and the y ‐axis is the discharge gap.…”

Section: Resultsmentioning

confidence: 99%

Streamer dynamics and charge self‐erasing of two counter‐propagating plasmas in repetitively pulsed surface dielectric barrier discharge

et al. 2022

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The streamer dynamics and charge self‐erasing of two counter‐propagating plasmas generated by repetitively pulsed surface dielectric barrier discharge are investigated using electrical and optical diagnosis, and a two‐dimensional fluid model. Three distinct discharge phases of primary, transitional and secondary streamers are identified in a single‐pulse discharge through the time‐resolved plasma images. Moreover, a merging phenomenon of the two opposing primary streamers is observed at the middle position of the discharge gap. Compared to the first pulse, a low streamer propagation velocity of the primary streamer is measured during the subsequent discharge process due to the limitation of residual surface charges left by the previous discharge. No significant differences of the transferred charge and the deposited energy are obtained in the sequential pulses at a discharge gap of 9 mm. Numerical simulations show that a reduction for the plasma intensity of the approached two primary streamers is attributed by the accumulated charge on the dielectric surface and gathered positive charges in the streamer head. Numerical and experimental studies indicate that the residual charges can be erased by the secondary streamer through the drifted electrons, namely that a phenomenon of charge self‐erasing can be realized in the individual pulse.

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“…By controlling such discharge parameters as pulse repetition rate, the generation of the NRP discharge plasma can be adjusted effectively, producing the large volume uniform discharge plasma. It is conducive to achieve uniform and controllable combustion, and maintain low energy consumption [23,24]. Despite considerable progress in the NRP discharge, the NRP has limitation for the selective excitation of the plasma.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on plasma assisted ignition of methane/air mixture excited by the synergistic nanosecond repetitive pulsed and DC discharge

Shi¹,

Chen²,

Chen³

et al. 2020

J. Phys. D: Appl. Phys.

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Plasma assisted combustion provides possibilities for reducing ignition delays and controlling pollutant emissions. The zero-dimensional plasma and combustion models have been built up to numerically investigate the effects of the synergistic nanosecond repetitive pulsed (NRP) and DC discharge on the methane/air plasma assisted ignition. The synergistic discharge means exerting the low voltage DC discharge after the NRP discharge in one period of the discharge plasma. The simulation results indicate that the selective excitation of the vibrationally excited species N2(v), O2(v) and CH4(v) as well as the electronically excited species O2(a1Δg) and O2(b1Σg +) by the synergistic discharge is superior to that by the NRP discharge when the electron energy has been deposited into different molecular degrees of freedom. The plasma kinetic effect on the ignition enhancement is highly efficient since it can break though the threshold of the thermal effect. Both the kinetic effect and the thermal effect of the NRP discharge on ignition enhancement are relatively weaker than those of the synergistic discharge. Besides, reactions involved the N2 electronically excited species produce abundant O and H, which is conducive to the formation of the methane oxidation intermediates. e + O2 = e + O + O(1D) in the NRP discharge and e + O2 = e + O2(a1Δg) in the synergistic discharge play the crucial roles in the methane/air plasma enhance ignition, respectively.

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Numerical investigation of nanosecond pulsed discharge in air at above-atmospheric pressures

Cited by 18 publications

References 37 publications

Spatiotemporal analysis of streamer discharge in a wire-to-wire reactor with positive nanosecond pulse supply

Spatiotemporal analysis of streamer discharge in a wire-to-wire reactor with positive nanosecond pulse supply

Streamer dynamics and charge self‐erasing of two counter‐propagating plasmas in repetitively pulsed surface dielectric barrier discharge

Numerical investigation on plasma assisted ignition of methane/air mixture excited by the synergistic nanosecond repetitive pulsed and DC discharge

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