602 Numerical Study on Ignition Characteristics of Methane-air Mixture Using Detailed Chemical Kinetics : Effect of Heat Loss to Electrode and Electrode Distance on Ignition Characteristics

Han, Jilin; Yamashita, Hiroshi; Yamamoto, Kazuhiro

doi:10.1299/jsmetokai.2009.58.367

Cited by 4 publications

(8 citation statements)

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“…The numerical method was the same as that used in previous studies [11,12] for methaneeair mixtures. The finite volume method [22] was used to discretize the above governing differential equations in space and time.…”

Section: Methodsmentioning

confidence: 99%

“…1 contained the computational region, boundary conditions, electrode geometry, and location of the spark channel. The distance between the first 60 grid points around the electrode was set at 0.025 mm due to the smaller quenching distance of a hydrogeneair mixture compared to a methaneeair mixture in the r and z directions [11,12]. The computational region spanned 5.8 mm in both the r and z directions.…”

Section: Initial and Boundary Conditionsmentioning

confidence: 99%

“…The effects of the electrode temperature on the relationship between the MIE and the equivalence ratio, and the effects of the electrode size, electrode gap distance, equivalence ratio, and spark duration on the MIE for a methaneeair mixture have also been examined [12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical study on the spark ignition characteristics of hydrogen–air mixture using detailed chemical kinetics

Han¹,

Yamashita²,

Hayashi³

2011

International Journal of Hydrogen Energy

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Section: Methodsmentioning

confidence: 99%

Section: Initial and Boundary Conditionsmentioning

confidence: 99%

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Numerical study on the spark ignition characteristics of hydrogen–air mixture using detailed chemical kinetics

Han¹,

Yamashita²,

Hayashi³

2011

International Journal of Hydrogen Energy

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“…Kelley et al [28] and Chen et al [29,30] reported that increasing E ig could enhance the early flame propagation speed shortly after the spark discharge, resulting in a shorter explosion duration. This is because the larger E ig , the higher concentration of active radicals inside the spark gap [31] and/or the higher chemical power release [32]. Moreover, for laminar CH 4 /O 2 /N 2 /He spherical flames, Zhou et al [33] found that the increasing E ig in a specific range could promote the early flame propagation speed; beyond such range, the additional E ig has a marginal effect on the early flame propagation speed, as it does for the explosion duration.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ignition Energy and Hydrogen Addition on Laminar Flame Speed, Ignition Delay Time, and Flame Rising Time of Lean Methane/Air Mixtures

et al. 2022

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A series of experiments were performed to investigate the effect of ignition energy (Eig) and hydrogen addition on the laminar burning velocity (Su0), ignition delay time (tdelay), and flame rising time (trising) of lean methane−air mixtures. The mixtures at three different equivalence ratios (ϕ) of 0.6, 0.7, and 0.8 with varying hydrogen volume fractions from 0 to 50% were centrally ignited in a constant volume combustion chamber by a pair of pin-to-pin electrodes at a spark gap of 2.0 mm. In situ ignition energy (Eig ∼2.4 mJ ÷ 58 mJ) was calculated by integration of the product of current and voltage between positive and negative electrodes. The result revealed that the Su0 value increases non-linearly with increasing hydrogen fraction at three equivalence ratios of 0.6, 0.7, and 0.8, by which the increasing slope of Su0 changes from gradual to drastic when the hydrogen fraction is greater than 20%. tdelay and trising decrease quickly with increasing hydrogen fraction; however, trising drops faster than tdelay at ϕ = 0.6 and 0.7, and the reverse is true at ϕ = 0.8. Furthermore, tdelay transition is observed when Eig > Eig,critical, by which tdelay drastically drops in the pre-transition and gradually decreases in the post-transition. These results may be relevant to spark ignition engines operated under lean-burn conditions.

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“…The radiant output is coupled to the combustion chamber by a photon transmission means. The radiation is transmitted and focused using optical collecting lenswhich focusses the beam at a selected region within the air/fuel mixture, the mixture being provided, [3,4] typically, as a premixed mixture of air and fuel. The region of the fuel mixture is selected to be at an optimum position within the spark in order to provide the best ignition characteristics.…”

Section: Introductionmentioning

confidence: 99%

The Desi̇gn and İmplementati̇on of Laser İgni̇ti̇on System Fortwoslot and Four Slot Ev Burners

Attia

Emara

Ayoub

et al. 2018

The International Conference on Mathematics and Engineering Phy

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EV Burners are of the type undergoing periodically ignited constant-volume combustion. In contrast to conventional firing techniques, wherein constant-pressure combustions occur substantially, a constant-volume combustion entails an explosive combustion with an accompanying pressure wave. A particular advantage of constant-volume combustions is that the pertinent starting components have a stoichiometric relationship and can be virtually completely consumed. Shock wave burner includes equipment for periodically injecting fuel-oxidant mixture into a constant-volume combustion chamber, a laser pulse device for directing an intermittent beam of laser radiation pulses into the chamber so as to repeatedly ignite fuel-oxidant mixture supplied thereto, and equipment for synchronizing the frequency of injection of the fuel-oxidant mixture into the chamber with the pulse frequency of the laser beam. A photon ignition system for igniting the air/fuel spray Within a Combustion chamber of a gas turbine engine is comprised of a photon source has an output wavelength characteristic suitable for being absorbed by the hydrocarbon fuel droplets within the fuel spray. An ultraviolet flash having spectral characteristics which are selected to be strongly absorbed by hydrocarbon fuel

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602 Numerical Study on Ignition Characteristics of Methane-air Mixture Using Detailed Chemical Kinetics : Effect of Heat Loss to Electrode and Electrode Distance on Ignition Characteristics

Cited by 4 publications

References 0 publications

Numerical study on the spark ignition characteristics of hydrogen–air mixture using detailed chemical kinetics

Numerical study on the spark ignition characteristics of hydrogen–air mixture using detailed chemical kinetics

Effect of Ignition Energy and Hydrogen Addition on Laminar Flame Speed, Ignition Delay Time, and Flame Rising Time of Lean Methane/Air Mixtures

The Desi̇gn and İmplementati̇on of Laser İgni̇ti̇on System Fortwoslot and Four Slot Ev Burners

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