Spark Plug and Corona Abilities to Ignite Stoichiometric and Lean Methane/Air Mixtures

Bellenoue, Marc; Labuda, S. A.; Ruttun, B.; Sotton, Julien

doi:10.1080/00102200600637584

Cited by 12 publications

(4 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In commercial ignition devices, all these problems are solved by supplying much more energy than should be needed in a theoretical combustion ignition model. However, alternative solutions using non-thermal plasmas for car engine applications are starting to emerge [3][4][5][6][7][8][9]. Ten years ago, not many scientific works were conducted on these kinds of ignition systems because of strong technological issues but also because experimental studies on multiscale physical and chemical processes under severe conditions of temperature, pressure and aerodynamics are very difficult to carry out.…”

Section: Introductionmentioning

confidence: 99%

Diffuse mode and diffuse-to-filamentary transition in a high pressure nanosecond scale corona discharge under high voltage

Tardiveau¹,

Moreau²,

Bentaleb³

et al. 2009

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

The dynamics of a point-to-plane corona discharge induced in high pressure air under nanosecond scale high overvoltage is investigated. The electrical and optical properties of the discharge can be described in space and time with fast and precise current measurements coupled to gated and intensified imaging. Under atmospheric pressure, the discharge exhibits a diffuse pattern like a multielectron avalanche propagating through a direct field ionization mechanism. The diffuse regime can exist since the voltage rise time is much shorter than the characteristic time of the field screening effects, and as long as the local field is higher than the critical ionization field in air. As one of these conditions is not fulfilled, the discharge turns into a multi-channel regime and the diffuse-to-filamentary transition strongly depends on the overvoltage, the point-to-plane gap length and the pressure. When pressure is increased above atmospheric pressure, the diffuse stage and its transition to streamers seem to satisfy similarity rules as the key parameter is the reduced critical ionization field only. However, above 3 bar, neither diffuse avalanche nor streamer filaments are observed but a kind of streamer–leader regime, due to the fact that mechanisms such as photoionization and heat diffusion are not similar to pressure.

show abstract

Section: Introductionmentioning

confidence: 99%

Diffuse mode and diffuse-to-filamentary transition in a high pressure nanosecond scale corona discharge under high voltage

Tardiveau¹,

Moreau²,

Bentaleb³

et al. 2009

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…It has been shown that besides spark discharges, conventionally used for ignition, other plasma sources may be effective, including those producing non-thermal plasma. In particular, interesting experimental results have been obtained on initiation of combustion of cold methane-air and propaneair mixtures by transient plasma (or pulsed corona) discharges [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Modelling of transient plasma discharges in atmospheric-pressure methane–air mixtures

Naidis¹

2007

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Results of the simulation of transient plasma discharges in a stoichiometric atmospheric-pressure methane–air mixture are presented. It is shown that current control allows one to produce non-thermal plasma with parameters (the gas temperature, the molar fractions of active species) varying over a wide range. The calculated plasma parameters are used in the modelling of ignition of the mixture. Estimated values of the ignition delay time and the minimum ignition energy are given.

show abstract

“…To overcome this problem and achieve successful ignition in lean fuel/air mixture, especially in ICEs, a reliable ignition strategy, that is, nonequilibrium plasma-assisted ignition/combustion (PAI/PAC) technology is proposed (Bellenoue et al, 2007;Cathey et al, 2007;Cathey et al, 2008;Singleton et al, 2010;Zhu et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…The novel promising ignition systems characterized by nonequilibrium plasma can be created by corona discharge (Bellenoue et al, 2007), nanosecond repetitively pulsed discharge (NRPD) (Cathey et al, 2007), and gliding arc discharge (Zhu et al, 2017). Among them, NRPD is the one with a smaller proportion of energy thermalization which has been demonstrated great potential to achieve stable combustion in lean-burn gasoline engines (Cathey et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

The numerical simulation of nanosecond-pulsed discharge-assisted ignition in lean-burn natural gas HCCI engines

Ban

Zhang²,

Zhong³

et al. 2022

Front. Mech. Eng.

View full text Add to dashboard Cite

A plasma-assisted internal combustion engine model is established based on detailed plasma kinetics, combustion kinetics, and physical compression/expansion processes. The effects of nanosecond repetitively pulsed discharge (NRPD) on plasma-assisted ignition characteristics of mixtures under different fuel concentrations are studied under HCCI engine-relevant conditions. The coupled plasma and chemical kinetic model are validated with experiments. The comparison between NRPD and thermal ignition with a certain amount of input energy is carried out, and the results show that the former can ignite a mixture owing to the kinetic effect of nonequilibrium plasma, but the latter cannot ensure ignition. Path flux analysis shows that excited states and electrons react with fuel, providing O and H directly, increasing the possibility of ignition at a low temperature. The effect of NRPD on combustion performance under various equivalence ratios (φ) is investigated. It was found that in ICEs with NRPD, the ignition delay time under the lean-burn condition (φ = 0.5) is the shortest among three demonstrative cases. Even though the leaner mixture case with φ = 0.2 is more favorable for the production of O and OH during the discharge, after discharge, the heat release in case 2 with φ = 0.5 dramatically increases, resulting in the temperature exceeding that in the ultra-lean case. As the piston moves up, the higher amounts of CH3, HO2, and H2O2 as well as higher temperature for the lean-burn (φ = 0.5) case lead to the rapid increase of OH and O, which accelerates the consumption of methane and finally the earliest hot ignition near TDC. Finally, a series of parameter studies are performed to show the effects of E/N, current density, φ, and discharge timing on the ignition process. The results suggest that discharge parameters E/N and current density together with discharge timings and equivalence ratios can improve ignitability in internal combustion engines.

show abstract

Spark Plug and Corona Abilities to Ignite Stoichiometric and Lean Methane/Air Mixtures

Cited by 12 publications

References 13 publications

Diffuse mode and diffuse-to-filamentary transition in a high pressure nanosecond scale corona discharge under high voltage

Diffuse mode and diffuse-to-filamentary transition in a high pressure nanosecond scale corona discharge under high voltage

Modelling of transient plasma discharges in atmospheric-pressure methane–air mixtures

The numerical simulation of nanosecond-pulsed discharge-assisted ignition in lean-burn natural gas HCCI engines

Contact Info

Product

Resources

About