Numerical simulations of lean propane-air flames propagating in circular tubes under quenching conditions

• Autorzy: Gutkowski A.
• Języki publikacji: EN

Abstrakty

EN

Flame extinction in internal combustion engines can be observed when a flame front enters a small gap between the cylinder and piston or above the piston rings. This phenomenon is caused by the interaction of the flame with the walls. Cooling of the reaction zone by the wall is the reason for the flame extinction. Simplifying the problem to the propagation of a premixed laminar flame in the narrow channels with isothermal wall allowed employing numerical methods to analyze this phenomenon. The aim of this work was to examine flame behavior during its propagation in the narrow circular tube. A numerical analysis of the freely propagating flame was conducted. In this study, the propagation and quenching of a laminar premixed propane/air flame in circular tube was investigated numerically. The flame chemistry is modeled by one-step overall reaction. The considerations are limited to flames propagating downwards in lean propane-air mixtures. Quenching diameter as a function of equivalence ratio was determined. One of the most important flame parameters - flame propagation velocity (under quenching conditions) was compared with adiabatic burning velocity and limit burning velocity predicted by Zeldovich. It was found satisfactory agreement between numerical calculations and theoretical considerations. Numerical results show also that there is a close dependence between preheat zone and dead space for flames propagating in a wider tube.

Słowa kluczowe

EN

flame quenching; flame propagation velocity; simulation

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2008
• Tom: Vol. 15, No. 2
• Strony: 117--123
• Opis fizyczny: Bibliogr. 13 poz., rys.

Twórcy

autor

Gutkowski A.

• Technical University of Lodz Department of Heat Technology and Refrigeration Stefanowskiego Street 1/15, 90-924 Lodz, Poland tel.:[phone], fax: [phone],

Bibliografia

• [1] Potter, Jr. A. E., Flame Quenching, Progress in Combustion and Fuel Technology, Vol. 1, ed. Durcarme, J., Gerstain, M., Lefebvre, A. H., Pergamon Press, pp. 145-182, New York 1960.
• [2] Jarosinski, J.,Flame Quenching by a Cold Wall, Combustion and Flame, 50, pp. 167-175, 1983.
• [3] Jarosinski, J., Podfilipski, J., Properties of Propane Flames, Eighteenth International Colloquium on the Dynamics of Explosions and Reactive Systems, pp. 90-94, Seattle 2001.
• [4] von Karman, T., Millan, G., Theoretical and Experimental Studies on Laminar Combustion and Detonation Waves, Fourth Symp. (Int.) on Combustion, The Combustion Inst., pp. 173-177, Pittsburgh 1953.
• [5] Aly, S. L.,Hermance, C. E., A Two-Dimensional Theory of Laminar Flame Quenching, Combustion and Flame, 40, pp. 173-185, 1981.
• [6] Lee, S. T.,T’ien J. S., A Numerical Analysis of Flame Flashback in a Premixed Laminar System, Combustion and Flame, 48, pp. 273-285, 1982.
• [7] Lee, S. T., Tsai C. H., Numerical Investigation of Steady Laminar Propagation in a Circular Tube, Combustion and Flame, 99, pp. 484-490, 1994.
• [8] Song, Z. B., Ding, X. W., Yu, J. L. and Chen, Y. Z., Propagation and Quenching of Premixed Flames in Narrow Channels, Combustion, Explosion, and Shock Waves, Vol. 42, No. 3, pp. 268-276, 2006.
• [9] Maruta, K, Kataoka, T., Kim, N. I., Minaev, S., Fursenko, R., Characteristics of Combustion in Narrow Channel with a Temperature Gradient, Proceedings of the Combustion Institute, 30, pp. 2429-2436, 2005.
• [10] Westbrook, C. K., Dryer, F. L., Chemical Kinetic Modeling of Hydrocarbon Combustion, Prog. Energy Combust. Sci, Vol. 10, pp. 1-57, 1984.
• [11] Zeldovich, Ya. B., Theory of Limit Propagation of Slow Flame, Zhur. Eksp. Teor. Fiz., 11: 159, 1941.
• [12] Zeldovich, Ya. B., Theory of Combustion and Gas Detonation, Moscow: Akad. Nauk SSSR, 1944.
• [13] Vagelopoulos, C. M., Egolfopoulos, F. N., Direct Experimental Determination of Laminar Flame Speeds, Twenty-Seventh Symposium (International) on Combustion, The Combustion Institute, pp. 513–519, Pittsburgh 1998.