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

Han, Jilin; Yamashita, Hiroshi; Hayashi, Naoki

doi:10.1016/j.combustflame.2010.02.021

Cited by 55 publications

(8 citation statements)

References 18 publications

(21 reference statements)

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“…Much of the previous work on simulating ignition has idealized the problem and treated one-dimensional spherical and cylindrical spark kernels. Several authors have used two-dimensional simulations of spark discharge in a non-reactive gas [4][5][6][7] to investigate the fluid mechanics involved in the spark ignition process, and two-dimensional simulations of ignition are discussed in [8][9][10][11][12][13][14][15][16]. In all the two-dimensional studies, the classic toroidal shape of the hot gas kernel is observed, which occurs due to fluid flow inward toward the gap center.…”

Section: Introductionmentioning

confidence: 99%

“…Akram [5] and Thiele et al [10] performed simulations for several electrode geometries, however, the geometries were limited to blunt and cone-shaped electrodes with diameters of 1 to 2 mm. Most recently, Han et al simulated ignition in methane-air [14] and hydrogen-air [15] mixtures and studied the effects of temperature, electrode gap distance, electrode size (cylindrical electrodes), and spark duration on the predicted minimum ignition energy (MIE). These studies used detailed chemistry and provided new insight on the effect of different spark parameters on ignition.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the effect of electrode geometry on spark ignition

Bane

Ziegler

Shepherd

2015

Combustion and Flame

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High-speed schlieren visualization and numerical simulations are used to study the fluid mechanics following a spark discharge and the effect on the ignition process in a hydrogen-air mixture. A two-dimensional axisymmetric model of spark discharge in air and spark ignition was developed using the non-reactive and reactive Navier-Stokes equations including mass and heat diffusion. The numerical method employs structured adaptive mesh refinement software to produce highly-resolved simulations, which is critical for accurate resolution of all the physical scales of the complex fluid mechanics and chemistry. The simulations were performed with three different electrode geometries to investigate the effect of the geometry on the fluid mechanics of the evolving spark kernel and on flame formation. The computational results were compared with high-speed schlieren visualization of spark and ignition kernels. It was shown that the spark channel emits a blast wave that is spherical near the electrode surfaces and cylindrical near the center of the spark gap, and thus is highly influenced by the electrode geometry. The ensuing competition between spherical and cylindrical expansion in the spark $ Full-length article submitted to Combustion and Flame.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of the effect of electrode geometry on spark ignition

Bane

Ziegler

Shepherd

2015

Combustion and Flame

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“…The method was validated either by comparing the resulted parameters with those reported in literature [21][22][23][24][25][26][27][28], or by analysing also the time evolution of emitted radiation within the same time interval [29].…”

Section: Resultsmentioning

confidence: 99%

“…Variation of the baric coefficient b from the law (2) with CH4 content in mixtures with air (ref. [28])…”

Section: Figure 6 Effect Of Inert Addition On the Ignition Delaymentioning

confidence: 99%

The development of a new optical method to measure the delay time of spark ignition

Mitu¹,

Razus²,

Oancea³

2019

Studia UBB Chemia

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The development of a new optical method to measure the delay time following the spark ignition in gaseous explosive mixtures, based on the measurement of the emitted radiation intensity detected with a photo diode active in visible and near infrared range is presented. Several CH4-air-inert mixtures were used to test the validity of the method. Our results are comparable with the available literature data. The influence of the different operational factors was investigated to establish the range of the optimum conditions.

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“…where _ m is the burner mass flow rate, subscript q denotes quenching, and A is the coefficient of proportionality between L st and _ m. Quantity L q is the minimum separation between parallel walls for which a flame can propagate [22][23][24]. Quenching diameters in round tubes are typically 50% larger [25].…”

Section: Scaling Modelmentioning

confidence: 99%