Effect of constant and pulsed-periodic electric fields on combustion of a propane-air mixture

Garanin, A. F.; Tretyakov, P. K.; Tupikin, A. V.

doi:10.1007/s10573-008-0003-3

Cited by 6 publications

(3 citation statements)

References 2 publications

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“…• High-frequency electric field has an advantage over the constant electric field. Experimental work [10] shows that starting with a frequency of 150 Hz at a voltage of 1 kV, high-frequency electric field leads to a marked increase in the flame velocity compared to the constant electric field. • Under the influence of high voltage electric field, fuel atoms transition to an excited state (electrochemical effect).…”

Section: Electric Ignition Systemmentioning

confidence: 97%

Ignition of a Cold Pulverized Coal Fuel by Means of an Electric Ignition System

Sinelnikov

2022

Energy Systems Research

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Coal-fired generation has long been, and still is, one of the leaders in global electricity generation. The high share of coal-fired generation in the global energy mix is achieved due to the known advantages of this fuel, including high availability of reserves, relative ease of extraction, and the possibilities of providing its reserves at the plants and reliable equipment operation even in the event of fuel supply interruptions. Coal combustion in modern industry requires the development of modern start-up systems for coal-fired boiler units without the use of fuel oil. Fuel oil is used for starting up boilers and maintaining the flame during transient conditions or at low loads of boiler. At the same time, the use of fuel oil has some disadvantages, both technical and environmental. The greatest challenge in developing high-frequency ignition systems is to understand the chemical kinetics processes for the plasma chemical reaction of fuel mixture ignition. This paper presents experimental and industrial studies on the application of an electric ignition system for coal fuel based on a high-frequency power source. Experimental studies were carried out on a laboratory bench with a thermal capacity of 5 MW. Industrial tests were performed at the operating enterprises of the power sector of the Russian Federation. Lignite and hard coals of different thermal-technical composition were used as fuel samples. The principle behind the effect of this system on the fuel ignition has been shown.

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Section: Electric Ignition Systemmentioning

confidence: 97%

Ignition of a Cold Pulverized Coal Fuel by Means of an Electric Ignition System

Sinelnikov

2022

Energy Systems Research

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“…This is most clearly evidenced by hydrodynamic characteristics of the combustion process. The experiments [26] were performed for a homogeneous propane-air mixture. The velocity of flame propagation was assumed to be the normal component of the mean velocity to the combustion-front surface in the jet core; the changes in this parameter were used to determine the effect of the electric field.…”

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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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“…Realization of a particular mechanism depends on the physical and chemical properties of the fuel, hydrodynamic conditions, electric field geometry, its strength, and its frequency [6]. In the laminar flow regime, the burning rate under the action of a pulsed-periodic electric field can be higher than that in a d.c. field [7]. Changes leading to flame stability can arise [8].…”

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confidence: 99%