Effect of an axial electric field on detonation waves

Kamenskihs, Vsevolods; Lee, John H. S.

doi:10.1016/j.combustflame.2012.06.007

Cited by 3 publications

(3 citation statements)

References 8 publications

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“…In addition, the synchronization of such distributed arc discharges, each of them acting as a local ignition source, is extremely important and challenging. A non-optimized synchronization could induce adverse effects on the DDT [19].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of the transition to detonation of a turbulent hydrogen–air flame by nanosecond repetitively pulsed plasma discharges

Gray

Lacoste

2019

Combustion and Flame

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This work provides proof of concept for the use of nanosecond repetitively pulsed (NRP) plasma discharges to accelerate a propagating turbulent flame, resulting in enhanced deflagration-to-detonation transition and significant reduction in run-up length. The investigations are conducted on a stoichiometric hydrogen-air mixture at near ambient conditions. The effect of plasma actuation on the flame velocity is investigated using time-of-flight measurements of the propagating flame and detonation wave. The flame velocity shortly after the application of the NRP plasma discharges is more than double that obtained in cases in which no plasma is applied. High-speed imaging of OH * chemiluminescence in the electrode area confirms this result and provides insight about the mechanisms of plasma action. While the volumetric energy deposited during plasma actuation is sufficiently low as to not ignite the combustible mixture prior the arrival of the flame, the chemical and thermal enhancement of the gas is efficient enough to significantly

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Section: Introductionmentioning

confidence: 99%

Enhancement of the transition to detonation of a turbulent hydrogen–air flame by nanosecond repetitively pulsed plasma discharges

Gray

Lacoste

2019

Combustion and Flame

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“…Electrical actuation has been considered for both, enhancing the ignition stage [211][212][213][214][215][216][217]222], and flame acceleration and/or flame-shock interactions [220,221,223]. A few additional works focused on electrical actu-ation for enhancement of detonation properties, such as detonation velocity or cell size [224][225][226].…”

Section: Combined Thermal and Transport Effectsmentioning

confidence: 99%

“…For an already existing detonation, only a few papers report on properties enhancement by means of an electric field. The effect of an axial DC electric field, in the range 200-8000 V/cm, on the propagation of detonation waves was investigated in [224,225]. Both studies reported an effect on the detonation velocity, but, more importantly, they showed the strong interaction between the detonation wave and the electric field, with electrical breakdowns induced by the arrival of the detonation in the applied electric field.…”

Section: Plasma-assisted Detonation Propertiesmentioning

confidence: 99%

Non-equilibrium plasma for ignition and combustion enhancement

2021

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This review is intended to give an overview of recent results on plasma-assisted ignition and combustion. The influence of electrical discharges on combustion processes is introduced, and the excited species and radicals present in large quantity in the plasma are detailed. A description of theoretical problems related to modeling plasma-assisted combustion is given, elucidating the role of excited states in enhancing the reaction rates. Then some experiments are reported, focused on fundamental aspects on the effects of high pressure discharges in improving the ignition of combustion. To conclude, some applications for plasma-assisted combustion and detonation are presented, activated by different kinds of discharges.

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