Evolution of charged species in propane/air flames: mass-spectrometric analysis and modelling

Rodrigues, Jm; Agneray, A.; Jaffrezic, Xavier; Bellenoue, Marc; Labuda, S. A.; Leys, Christophe; Chernukho, Ap; Migoun, A.N.; Cenian, Adam; Savel'ev, Am; Титова, Н. С.; Starik, A. M.

doi:10.1088/0963-0252/16/1/021

Cited by 32 publications

(23 citation statements)

References 34 publications

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“…no medium rarefaction is needed, as is particularly needed in the case of electrostatic ion analysers [20]); and -there is an adequate theory of the interaction of microwaves with a high-collision frequency low-temperature plasma layer [21], while a generally recognized theory of the Langmuir probe operation under non-steady conditions in the presence of chemi-ionization reactions is lacking.…”

Section: Experimental Layout and Diagnostics Techniquesmentioning

confidence: 99%

Fast combustion waves and chemi-ionization processes in a flame initiated by a powerful local plasma source in a closed reactor

Артемьев

Berezhetskaya

Kazantsev

et al. 2015

Phil. Trans. R. Soc. A.

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Section: Experimental Layout and Diagnostics Techniquesmentioning

confidence: 99%

Fast combustion waves and chemi-ionization processes in a flame initiated by a powerful local plasma source in a closed reactor

Артемьев

Berezhetskaya

Kazantsev

et al. 2015

Phil. Trans. R. Soc. A.

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“…Using an average number density of positive ions of 3 × 10 16 m −3 for a near stoichiometric C 3 H 8 /air flame and assuming the maximum possible gradient over a distance of 0.2 mm, reaction zone thickness at atmospheric pressure with 2000 K flame temperature [19], the gradient terms in (3) yield a body force of about 3.5 N/m 3 (negative ion density in the reaction zone is an order of magnitude smaller than the positive ion density [20] so its contribution can be neglected). This is calculated as a volumetric body force along the reaction zone and the effects due to this body force-induced flame flow perturbation should be initiated throughout the entire flame volume.…”

Section: Introductionmentioning

confidence: 99%

Pulsed Current-Voltage-Induced Perturbations of a Premixed Propane/Air Flame

Schmidt¹,

Ganguly²

2011

Journal of Combustion

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The effect of millisecond wide sub-breakdown pulsed voltage-current induced flow perturbation has been measured in premixed laminar atmospheric pressure propane/air flame. The flame equivalence ratios were varied from 0.8 to 1.2 with the flow speeds near 1.1 meter/second. Spatio-temporal flame structure changes were observed through collection of CH (A-X) and OH (A-X) chemiluminescence and simultaneous spontaneous Raman scattering from N 2 . This optical collection scheme allows us to obtain a strong correlation between the measured gas temperature and the chemiluminescence intensity, verifying that chemiluminescence images provide accurate measurements of flame reaction zone structure modifications. The experimental results suggest that the flame perturbation is caused by ionic wind originating only from the radial positive space-charge distribution in/near the cathode fall. A net momentum transfer acts along the annular space discharge distribution in the reaction zone at or near the cathode fall which modifies the flow field near the cathodic burner head. This radially inward directed body force appears to enhance mixing similar to a swirl induced modification of the flame structure. The flame fluidic response exhibit a strong dependence on the voltage pulse width ≤10 millisecond.

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“…ered in [6,7]. As Bradley and Nasser mentioned [6], the use of a corona discharge requires a greater amount of energy (by a factor of 500) than the use of an electric field acting via ionic wind.The electric properties of flames have been studied since early 1950s [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. The primary goal of those studies was to detect and identify ions in flames.…”

mentioning

confidence: 99%

“…Positive ions C 3 H + 3 , [9,10]. The main positive ion observed on the flame front was C 2 H 3 O + , while the main negative ion was HCO − 3 .…”

mentioning

confidence: 99%

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Effect of laser radiation and electric field on combustion of hydrocarbon-air mixtures

Tretyakov

Tupikin

Зудов

2009

Combust Explos Shock Waves

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Publications on combustion of hydrocarbon-air mixtures under the action of a weak electric field and laser radiation are analyzed. A specific feature of the authors' experimental study is a pulsed-periodic action of an electric field and focused laser radiation, which does not lead to electric discharge or optical breakdown. Numerous experiments reveal a noticeable effect of weak electric fields on combustion processes. Application of an electric field may result in expansion of the limits of flammability and combustion of fuel-air mixtures, changes (decrease or increase) in the burning rate, shifting of flame stabilization toward lean mixtures, reduction of the concentration of hazardous substances (for instance, NO x and CO) in combustion products, etc.The influence of electric fields on stability and emission properties of the flame is a known phenomenon, which was considered in numerous publications. Here we describes only some of the results obtained in this area. Calcote and Pease noted [1] that the flame stabilization limits can be substantially expanded by applying a longitudinal electric field to a Bunsen burner. This phenomenon was attributed to the effect of ionic wind induced by interaction of the electric field with chemiionization in the flame. Noorani and Holmes [2] reached 83% expansion of the laminar flame breakdown limits in a premixed methane-air mixture. Sepp and Ulybyshev [3] performed a systematic experimental study of the influence of electric fields on stability of both laminar and turbulent flames. Calcote and Berman [4] observed reduction of NO emission under the action of an electric field on a laminar flame of propane. Vatazhin et al.[5] managed to reach a more than tenfold decrease in CO emission in methane and propane flames. In that case, the electric potential for methane varied from zero to 1 kV. Various effects of electric fields on the flame were described. Thus, for instance, the possibility of using a corona discharge to affect the flame was consid-1 Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Division, Russian Academy of Sciences, Novosibirsk 630090; paveltr@itam.nsc.ru. ered in [6,7]. As Bradley and Nasser mentioned [6], the use of a corona discharge requires a greater amount of energy (by a factor of 500) than the use of an electric field acting via ionic wind.The electric properties of flames have been studied since early 1950s [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. The primary goal of those studies was to detect and identify ions in flames. In addition, the mechanisms of ion generation in flames were examined, and the inherent electric field of the flame was determined. The effect of the electric field on the flame was considered in [13,16,17]. Approximately 50 types of ions were identified in hydrocarbon flames, including CH + 3 , H 3 O + , CHO + , and C 3 H + 3 . The ion concentration was measured, and its peak was found to be located on the flame front [17]. The concentration of negative ions was found to be low (approx...

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Evolution of charged species in propane/air flames: mass-spectrometric analysis and modelling

Cited by 32 publications

References 34 publications

Fast combustion waves and chemi-ionization processes in a flame initiated by a powerful local plasma source in a closed reactor

Fast combustion waves and chemi-ionization processes in a flame initiated by a powerful local plasma source in a closed reactor

Pulsed Current-Voltage-Induced Perturbations of a Premixed Propane/Air Flame

Effect of laser radiation and electric field on combustion of hydrocarbon-air mixtures

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