Numerical study of the effects of non-equilibrium plasma on the ignition delay of a methane–air mixture using detailed ion chemical kinetics

Han, Jilin; Yamashita, Hiroshi

doi:10.1016/j.combustflame.2014.01.025

Cited by 22 publications

(7 citation statements)

References 17 publications

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“…The reaction equations and the corresponding rate coefficients are presented in the Supporting Information. The majority of electron collision reaction rate coefficients are calculated by BOLSIG+ using the cross sections from the online database LXCat. − The other reaction rate coefficients are taken from the literature. ,,,− …”

Section: Methodsmentioning

confidence: 99%

Numerical Investigations on Methane–Air Nanosecond Pulsed Dielectric Barrier Discharge Plasma-Assisted Combustion

et al. 2020

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Plasma-assisted combustion is a promising approach to achieve fast ignition and highly efficient combustion. In this work, methane−air nanosecond pulsed dielectric barrier discharge plasma-assisted combustion is numerically investigated by combining a homemade plasma model with the combustion model of software CHEMKIN-PRO. Effects of varying applied voltage amplitudes on the characteristic parameters of the plasma-assisted planar shear flow combustion as well as the reaction pathway maps of not only the nanosecond pulsed dielectric barrier discharge plasma but also the combustions without and with plasma assistance are systematically illustrated and analyzed. The simulation results indicate that under the combined action of increasing electric field intensity and increasing charged particle densities, the peak value of the discharge current density increases, and the peak time of the discharge current density is brought forward with the increase of the applied voltage amplitude. The temperature reaches its peak value earlier in the methane−air combustion with plasma assistance than without plasma assistance. The maximum temperature reduces to around 1900 K when the applied voltage amplitude is higher than 11 kV. There are emerging pathways to generate hydrocarbons C 2 H 4 and C 2 H 2 in the plasma-assisted combustion, the reactions of CH 4 on CH and C 2 H on H 2 , respectively. The reactions involving active species such as H play a significant role in the plasma-assisted combustion, which causes an obvious decrease in the densities of these active species with plasma assistance.

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Section: Methodsmentioning

confidence: 99%

Numerical Investigations on Methane–Air Nanosecond Pulsed Dielectric Barrier Discharge Plasma-Assisted Combustion

et al. 2020

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“…The loosely-coupled approach is used to deal with the simulation of plasma assisted detonation initiation here. [25,28] According to the operation sequence, that is, the first step is to start the discharge and the second step is to perform the heat ignition, the spatial distributions of key radicals and molecules at the moment when all the radicals reach their relatively high concentrations, which is obtained in the first stage (i.e., discharge simulation), together with the widely used traditional heat ignition, [29] are chosen as the initial conditions of the second stage (i.e., combustion simulation) in the discharge space.…”

Section: Simulation Of Detonation Initiationmentioning

confidence: 99%

Effect of actuating frequency on plasma assisted detonation initiation

Zhou¹,

Che²,

Wang³

et al. 2018

Chinese Phys. B

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Aiming at studying the influence of actuating frequency on plasma assisted detonation initiation by alternating current dielectric barrier discharge, a loosely coupled method is used to simulate the detonation initiation process of a hydrogenoxygen mixture in a detonation tube at different actuating frequencies. Both the discharge products and the detonation forming process which is assisted by the plasma are analyzed. It is found that the patterns of the temporal and spatial distributions of discharge products in one cycle are not changed by the actuating frequency. However, the concentration of every species decreases as the actuating frequency rises, and atom O is the most sensitive to this variation, which is related to the decrease of discharge power. With respect to the reaction flow of the detonation tube, the deflagration-todetonation transition (DDT) time and distance both increase as the actuating frequency rises, but the degree of effect on DDT development during flow field evolution is erratic. Generally, the actuating frequency affects none of the amplitude value of the pressure, temperature, species concentration of the flow field, and the combustion degree within the reaction zone.

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“…Tholin et al [13] conducted 2D simulations for the ignition of a lean hydrogen/air mixture by nanosecond spark discharge and showed that both the thermal and chemical effects are important for the forced ignition process. In their 1D simulations, Han and Yamashita [14] investigated the effects of the strength of the reduced electric field and discharge duration on the ignition delay time of the plasma-assisted ignition. Casteka et al [15] conducted experiments and 3D simulations for the ignition by NSD.…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of ignition enhancement by repetitive nanosecond discharge in a hydrogen/air mixture II: forced ignition

Wang¹,

Guo²,

Chen³

et al. 2020

J. Phys. D: Appl. Phys.

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Non-equilibrium plasma has promising applications in combustion enhancement. In this study, 1D simulations are conducted for the forced ignition process using non-equilibrium plasma generated by repetitively pulsed nanosecond discharge (NSD). The ignition kernel is induced by a discharge area with NSD and it develops and propagates in a static stoichiometric hydrogen/air mixture. The objective is to assess how the characteristics of NSD affect the ignition delay time and ignition kernel development during the forced ignition process. Similar to the homogeneous ignition considered in part I, the forced ignition process is found to be strongly affected by the pulse number, discharge frequency, discharge radius, total input energy, and input energy per pulse of NSD. For a fixed input energy per pulse, the ignition delay time decreases and the propagation speed of the initial ignition kernel increases with the pulse number, discharge frequency and discharge radius. However, for a fixed total input energy, the ignition delay time increases and the propagation speed of the initial ignition kernel decreases with the pulse number. Furthermore, it is found that the promotion of ignition kernel development and propagation in the forced ignition by NSD are mainly due to the kinetic effect rather than the thermal effect.

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Numerical study of the effects of non-equilibrium plasma on the ignition delay of a methane–air mixture using detailed ion chemical kinetics

Cited by 22 publications

References 17 publications

Numerical Investigations on Methane–Air Nanosecond Pulsed Dielectric Barrier Discharge Plasma-Assisted Combustion

Numerical Investigations on Methane–Air Nanosecond Pulsed Dielectric Barrier Discharge Plasma-Assisted Combustion

Effect of actuating frequency on plasma assisted detonation initiation

Numerical modeling of ignition enhancement by repetitive nanosecond discharge in a hydrogen/air mixture II: forced ignition

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