Peculiarities of the ignition of propane-air premixed flows by CO2 laser radiation

Vorontsov, S. S.; Зудов, В. Н.; Tretyakov, P. K.; Tupikin, A. V.

doi:10.1134/s0869864306040160

Cited by 4 publications

(4 citation statements)

References 6 publications

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“…There are four principle mechanisms by which laser radiation can ignite combustible gas mixtures [2]: i/ Thermal initiation (TI); ii/ Non-resonant breakdown (NRB); iii/ Resonant breakdown (RB); iv/ Photo-chemical ignition (PCI). TI involves the gas mixture consuming laser energy to heat it to beyond the threshold ignition temperature [8,9]. TI is also possible by heating of a target surface in the combustion chamber.…”

Section: The LI Process and Mechanismsmentioning

confidence: 99%

“…These included examination of the role of MP absorption in gas combustion by excimer [28], second harmonic pulsed ruby [11] and other forms of UV laser [29]. Whereas, IC engine based studies have mainly been limited to the discrete wavelengths provided by pulsed CO 2 lasers [9] and harmonics of the Nd:YAG laser [11,30]. The latter Nd:YAG laser studies concluded that more energy per pulse was needed to ignite at the second harmonic 532 nm compared with the fundamental 1064 nm.…”

Section: Mie and Laser Wavelength Tuningmentioning

confidence: 99%

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Laser ignited engines: progress, challenges and prospects

Dearden

Shenton

2013

Opt. Express

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Laser ignition (LI) has been shown to offer many potential benefits compared to spark ignition (SI) for improving the performance of internal combustion (IC) engines. This paper outlines progress made in recent research on laser ignited IC engines, discusses the potential advantages and control opportunities and considers the challenges faced and prospects for its future implementation. An experimental research effort has been underway at the University of Liverpool (UoL) to extend the stratified speed/load operating region of the gasoline direct injection (GDI) engine through LI research, for which an overview of some of the approaches, testing and results to date are presented. These indicate how LI can be used to improve control of the engine for: leaner operation, reductions in emissions, lower idle speed and improved combustion stability.

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Section: The LI Process and Mechanismsmentioning

confidence: 99%

Section: Mie and Laser Wavelength Tuningmentioning

confidence: 99%

Laser ignited engines: progress, challenges and prospects

Dearden

Shenton

2013

Opt. Express

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“…Vorontsov et al [34] considered the effects observed in the case of ignition of a propane-air flow by pulsedperiodic radiation of a CO 2 laser. The dynamics of this process was compared with the calculated ignition of a quiescent mixture with the same values of the equivalence ratio at different initial temperatures.…”

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confidence: 99%

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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“…During the thermal initiation (TI) phase the laser energy is taken by the in-cylinder mixture, the mixture being heated over the limit ignition temperature. Also, by heating a specific target surface inside the combustion chamber the TI phase can be established [3,4]. Analogous to the electric spark ignition, during the non-resonant breakdown (NRB) phase the laser beam creates an electric field of high intensity which leads to the dielectric state, [1].…”

Section: Introductionmentioning

confidence: 99%

Aspects of experimental investigations of laser plug ignition use at spark ignition engine

Done

2017

MATEC Web Conf.

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Abstract. Nowadays, the necessity of pollutant emissions reduction brings to the fore new technologies developed for a better control of the combustion process. Ignition is the process of starting radical reactions until a selfsustaining flame has developed and strongly affects the formation of pollutants. Among the new technologies used for ignition and combustion control, the Laser Plug Ignition system is defined as an innovative technology which overcomes several limitations of conventional spark ignition. Laser ignition technology presents many advantages for engine operating control, engine performance improvement and pollutant emissions reduction. The objective of the paper is the experimental research of the laser ignition used in the spark ignition engine. The laser plug ignition system was mounted on an experimental spark ignition engine and tested at the regime of 90% load and 2800 rpm and dosage, =1. The experimental results present the influence of laser ignition on different engine parameters compared to electric spark ignition. The influence on in-cylinder pressure, heat release rate, engine efficiency and pollutant emissions level is analyzed. Compared to a conventional spark plug, a laser ignition system assures efficient engine operation at lean dosages.

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Peculiarities of the ignition of propane-air premixed flows by CO2 laser radiation

Cited by 4 publications

References 6 publications

Laser ignited engines: progress, challenges and prospects

Laser ignited engines: progress, challenges and prospects

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

Aspects of experimental investigations of laser plug ignition use at spark ignition engine

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