Modeling of plasma combustion ignition on an electromagnetic wave driven metasurface

Kim, Yunho; Pederson, Dylan; Sharma, Ashish; Subramaniam, Vivek; Raja, Laxminarayan L.

doi:10.1088/1361-6463/ab7c96

Cited by 4 publications

(3 citation statements)

References 43 publications

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“…Since MW discharges in most experimental setups are at least two-dimensional, and in real situations threedimensional, it is necessary to extend existing models for the cases with more realistic geometry, taking into account a detailed description of nonequilibrium gas-discharge plasma, extended sets of plasma-chemical reactions, rapid gas heating in molecular gases and gas-dynamic gas expansion in the area of discharge formation, as well as the ways to control MW discharges, for example, by initiating laser breakdown [46]. It should be noted that in recent years, advanced models are developed that take into account the real geometry of MW discharges, the kinetics of elementary processes, as well as thermophysical and gasdynamic processes occurring in the region of discharge formation [47][48][49][50][51][52] Thus, in [53] a physical and mathematical model was formulated that takes into account the two-dimensional nature of the MW discharge plasma formation in a focusing device of an operating experimental setup. The case of plane EM waves with the TE 10 mode was considered, and the discharge geometry was chosen in such a way that the intensity vector oscillates in the direction perpendicular to the computational domain.…”

Section: Introductionmentioning

confidence: 99%

Simulation of filamentation dynamics of microwave discharge in nitrogen

Saifutdinov,

Kustova

2023

Plasma Sources Sci. Technol.

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The present study deals with numerical simulations of microwave (MW) discharges in nitrogen based on extended fluid-dynamic model. The set of governing equations for non-equilibrium gas-discharge plasma includes conservation equations for species number densities, electron energy density, Poisson equation for the electric field coupled to the multi-temperature Navier–Stokes fluid-dynamic equations taking into account thermal nonequilibrium; the power transmitted from MW radiation to electrons is determined from the Helmholtz equation. The kinetic scheme includes 61 reactions involving neutral molecules and atoms in the ground and electronically excited states, ions and electrons. The set of equations is solved for a two-dimensional problem under conditions of experiments at a pressure of 40 and 50 Torr and different electromagnetic wave frequencies and pulse duration. The dynamics of discharge formation and transition from the diffuse to the filament form is studied. The results are compared with experimental data, and a good agreement is shown for the time larger than 10 µs. The possible reasons for discrepancies at a shorter time are discussed and the effect of small oxygen impurities on the quantitative characteristics of the discharge are evaluated. The presence of a small oxygen impurity and seed electrons in the region of discharge formation yields a better agreement between numerical and experimental data.

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Section: Introductionmentioning

confidence: 99%

Simulation of filamentation dynamics of microwave discharge in nitrogen

Saifutdinov,

Kustova

2023

Plasma Sources Sci. Technol.

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“…Studies on CO 2 reforming by [20] using microwaves have established the energy efficiency of microwaves discharges at around 33% compared to 5% for DBDs. Microwave based surface discharge has also been shown in [21] to improve combustion ignition delay characteristics via large volumetric generation of primary combustion radicals which catalyze the combustion process.…”

Section: Introductionmentioning

confidence: 99%

Modeling of atmospheric gas-stream processing using a microwave excited all-dielectric resonant plasma discharge

Sharma¹,

Upadhyay²,

Karpatne³

et al. 2021

J. Phys. D: Appl. Phys.

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Computational modeling of an all-dielectric resonant plasma discharge for the processing of atmospheric air streams is presented. A single dielectric resonator (DR) pair separated by a small gap is considered. Governing equations for plasma, flow and electromagnetics are coupled to resolve the entire process characterized by fast timescale plasma breakdown followed by slow timescale transport of radicals catalyzed in the discharge. The resonant frequencies of the DR system are determined by solving for the electromagnetic wave across a range of microwave frequencies in the absence of the plasma. The DR operating at the resonant frequency (on-resonance mode) results in 12 times larger electric field amplification in the dielectric gap as compared to its operation in an off-resonance mode. Plasma breakdown occurs in the DR gap where the electric field amplification is the highest, due to constructive interference of electromagnetic wave modes from the adjoining cylindrical dielectrics. The plasma frequency in on-resonance mode is smaller than the resonant frequency of the DR. This inhibits the formation of surface wave modes and results in a uniform electromagnetic power deposition and volumetric plasma generation in the dielectric gap. It is seen that oxygen radicals (O) and oxygen metastable states O 2 a1 and O 2 b1 are dominant products of the plasma catalysis process. The active radical species are transported with the flow where they can be used in downstream plasma processing applications.

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“…Various types of non-equilibrium discharge plasma excitation approaches have been applied to plasma assisted combustion, including alternating current [13], direct current [14], gliding arc [15], dielectric barrier discharge (DBD) [16], radio-frequency [17], microwave [18] and nanosecond repetitive pulse (NRP) [19,20]. The in-situ and real-time diagnoses have been implemented for the non-equilibrium discharge plasma assisted combustion.…”

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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Modeling of plasma combustion ignition on an electromagnetic wave driven metasurface

Cited by 4 publications

References 43 publications

Simulation of filamentation dynamics of microwave discharge in nitrogen

Simulation of filamentation dynamics of microwave discharge in nitrogen

Modeling of atmospheric gas-stream processing using a microwave excited all-dielectric resonant plasma 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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