Initiation and propagation of flame fronts in lean CH4-air mixtures by the three modes of the ignition spark

Maly, R.; Vogel, Manfred

doi:10.1016/s0082-0784(79)80079-x

Cited by 225 publications

(105 citation statements)

References 6 publications

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“…Therefore one could expect pulsed corona might provide spatially extended ignition and higher burning rates, both of which are desirable for raising thermal efficiency of internal combustion engines. Similar high-voltage nanosecond discharges [13][14][15][16] have been reported as a potential new method for flame ignition and hypersonic flow control.…”

Section: Introductionmentioning

confidence: 83%

Effect of Discharge Energy and Cavity Geometry on Flame Ignition by Transient Plasma

Liu

Wang

Lee

et al. 2004

42nd AIAA Aerospace Sciences Meeting and Exhibit

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Effects of number of ignition site on burning times and comparison between pulsed corona and spark discharges with single ignition site and the same energy show that there are two possible mechanisms-chemical and geometric effects, which contribute to shortening delay and rise times of pulsed corona ignitions, respectively. Burning time shortening has also be demonstrated in a geometrically IC engine like combustion chamber at elevated pressure. Discharge efficiency of pulsed corona discharge is observed much higher than spark discharge.

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Section: Introductionmentioning

confidence: 83%

Effect of Discharge Energy and Cavity Geometry on Flame Ignition by Transient Plasma

Liu

Wang

Lee

et al. 2004

42nd AIAA Aerospace Sciences Meeting and Exhibit

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“…Unfortunately, uncertainties relative to the energy deposition typically amount to 30% or more [22,41]. The amount of energy supplied to the flow is expected to determine flame propagation in the very first instants.…”

Section: Validation Case In Laminar Premixed Conditionsmentioning

confidence: 99%

“…However, simulating the ignition phase of an aeronautical combustor is a difficult task as this event is a complex process involving a variety of physical phenomena. Five main phases may be distinguished during an ignition sequence [22]:…”

Section: Introductionmentioning

confidence: 99%

Large-Eddy Simulation of Kerosene Spray Ignition in a Simplified Aeronautic Combustor

Hervo

Senoner

Biancherin

et al. 2018

Flow Turbulence Combust

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“…In the present tests, spark energy was set at 20 mJ (electrical). Since the ignition system is inductive, only a small fraction of this energy is released in the breakdown phase (<10 ns), which (due to the high power peaks) drives the early kernel growth and induces likely perturbations in the flame [30,31]. Given the small spark energy, the extent of the ignition disturbances can be expected to be accordingly limited.…”

Section: Laminar Burning Propertiesmentioning

confidence: 99%

Burning Behaviour of High-Pressure CH4-H2-Air Mixtures

Moccia

D'Alessio

2013

Energies

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Experimental characterization of the burning behavior of gaseous mixtures has been carried out, analyzing spherical expanding flames. Tests were performed in the Device for Hydrogen-Air Reaction Mode Analysis (DHARMA) laboratory of Istituto Motori-CNR. Based on a high-pressure, constant-volume bomb, the activity is aimed at populating a systematic database on the burning properties of CH 4 , H 2 and other species of interest, in conditions typical of internal combustion (i.c.) engines and gas turbines. High-speed shadowgraph is used to record the flame growth, allowing to infer the laminar burning parameters and the flame stability properties. Mixtures of CH 4 , H 2 and air have been analyzed at initial temperature 293÷305 K, initial pressure 3÷18 bar and equivalence ratio  = 1.0. The amount of H 2 in the mixture was 0%, 20% and 30% (vol.). The effect of the initial pressure and of the Hydrogen content on the laminar burning velocity and the Markstein length has been evaluated: the relative weight and mutual interaction has been assessed of the two controlling parameters. Analysis has been carried out of the flame instability, expressed in terms of the critical radius for the onset of cellularity, as a function of the operating conditions.

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Initiation and propagation of flame fronts in lean CH4-air mixtures by the three modes of the ignition spark

Cited by 225 publications

References 6 publications

Effect of Discharge Energy and Cavity Geometry on Flame Ignition by Transient Plasma

Effect of Discharge Energy and Cavity Geometry on Flame Ignition by Transient Plasma

Large-Eddy Simulation of Kerosene Spray Ignition in a Simplified Aeronautic Combustor

Burning Behaviour of High-Pressure CH4-H2-Air Mixtures

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