Laminar burning velocity under quenching conditions for propane-air and ethylene-air flames

• Autorzy: Gutkowski A.
• Języki publikacji: EN

Abstrakty

EN

The aim of this study was to examine the influence of walls on laminar burning velocity for flames propagating in propane-air and ethylene-air mixtures near the quenching limit. Experiments were carried out in a narrow wedge-shaped channel and recorded by a camera. Results of measurements of laminar burning velocity under quenching conditions were compared with laminar burning velocity obtained for adiabatic and unstretched flames. It was found that the measured laminar burning velocity is lower than adiabatic laminar burning velocity for lean mixtures. For flames propagating in rich mixtures its value can equal the adiabatic laminar burning velocity. This phenomenon can be explained by the Lewis number effect (Le<1). Additionally, quenching distance for flames propagating in ethylene-air mixtures was determined. These results were used to determine the criticalPeclet number. Values of the number for ethylene-air flames are between Pe=30.2÷ 36.2.

• Wydawca: Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archivum Combustionis
• Rocznik: 2006
• Tom: Vol. 26 nr 3-4
• Strony: 163--173
• Opis fizyczny: Bibliogr. 13 poz., rys.

Twórcy

autor

Gutkowski A.

• Department of Heat Technology and Refrigeration, Technical University of Łódź, Poland ul. Stefanowskiego 1/15, fax: (048) [phone],

Bibliografia

• [1] Andrews G. E., Bradley D.: The Burning Velocity of Methane-Air Mixtures, Combustion and Flame, 19, 1972, pp. 275–288.
• [2] Yamaoka I. and Tsuji H.: Determination of Burning Velocity Using Counterflow Flames, Twentieth Symposium (International) on Combustion, The Combustion Institute, 1984, pp. 1883–1892.
• [3] Law C. K., Zhu D. L. and Yu G.: Propagation and Extinction of Stretched Premixed Flames, Twenty-First Symposium (International) on Combustion, The Combustion Institute, Pittsburgh, 1988, pp. 1419–1426.
• [4] Vagelopoulos C. M., Egolfopoulos F. N.: Direct Experimental Determination of Laminar Flame Speeds, Twenty-Seventh Symposium (International) on Combustion, The Combustion Institute, Pittsburgh, 1998, pp. 513–519.
• [5] Potter Jr. A. E.: Flame Quenching, Progress in Combustion and Fuel Technology, vol. 1, ed. J. Durcarme, M. Gerstain and A. H. Lefebvre, New York, Pergamon Press, 1960, pp. 145–182.
• [6] Jarosinski J.: Flame Quenching by a Cold Wall, Combustion and Flame, 50, 1983, pp. 167–175.
• [7] Jarosiński J., Podfilipski J.: Properties of Propane Flames, Eighteenth International Colloquium on the Dynamics of Explosions and Reactive Systems, Seattle, 2001, pp. 90–94.
• [8] Jarosinski J., Podfilipski J. and Fodemski T.: Properties of Flames Propagating in Propane–Air Mixtures Near Flammability and Quenching Limits, Combust. Sci. and Tech., 174, 2002, pp. 167–187.
• [9] Daou J. and Matalon M.: Influence of Conductive Heat-Losses on the Propagation of Premixed Flames in Channels, Combustion and Flame, 128, 2002, pp. 321–339.
• [10] Egolfopoulos, F. N., Zhu, D. L., and Law, C. K.: Experimental and Numerical Determination of Laminar Flame Speeds: Mixtures of C2-Hydrocarbons with Oxygen and Nitrogen, Proc. Combust. Inst. 23, 1990, 471- 478.
• [11] Law C. K.: Dynamics of Stretched Flames, Twenty Second Symposium (International) on Combustion, 1988, pp. 1381–1402.
• [12] Law C. K., Sung C. J.: Structure, Aerodynamics, and Geometry of Premixed Flamelets, Prog. Energy Combust. Sci., 26, 2000, pp. 459–505.
• [13] Kurdyumov V. N. and Fernandez-Tarrazo E.: Lewis Number Effect on the Propagation of Premixed Laminar Flames in Narrow Open Ducts, Combustion and Flame, 128, 2002, pp. 382–394.