Abstract
The propagation of gaseous explosions is governed by the interaction of chemical kinetics with the molecular and turbulent heat and mass transport. Combustion processes like deflagration and detonation depend on the different valence of physical effects under certain conditions. Geometry and the expansion flow of the flame itself affect the turbulence and therefore the transport of fuel into the reaction zone. The present paper discusses the different hydrogen combustion processes and reports on the experimental investigations of transport phenomena during flame propagation with highly blocking obstacles. Several facilities have been operated with sophisticated optical measurement techniques like high speed schlieren videographie, laser induced predissociation fluorescence and laser doppler velocimetry to obtain detailed information about the combustion process. It will be shown that the turbulent quenching of flames leads to an amount of free radicals resulting in sensitive clouds of those radicals with corresponding high chemical reaction rates, which has a strong influence on the efficiency of the combustion processes.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Brehm N. and Mayinger F., Limits for the transition from Deflagration to Detonation in Hydrogen — Air -Steam Mixtures, final report BMFT RS 1500712, FIZ4, Karlsruhe, 1988
Strube G., Struktur und Brenngeschwindigkeit turbulenter, vorgemischter Wasserstoff-Flammen, Dissertation TU München, 1993
Beauvais R., Brennverhalten vorgemischter, turbulenter Wasserstoff-Luft-Flammen in einem Explosionsrohr, Dissertation TU München, 1994
Strube G., Beauvais R., Mayinger F., Derzeitiger Wissensstand über den Verlauf der Grenze für den Ubergang einer Deflagration in eine Detonation (DDT) im Dreistoff-Diagramm Wasserstoff/Luft/Wasserdampf nach Shapiro/Moffette, Abschlußbericht, TU München, 1988
Ardey N., Durst B. and Mayinger F., Influence of Flame-Obstacle-Interaction on the Structure of Turbulent Deflagrations, Proceedings of the Int. Cooperative Exchange Meeting on Hydrogen in Reactor Safety, Toronto, 1997
McIntosh A. C., Influence of Pressure Waves on the Initial Development of an Explosion Kernel, AIAA Journal, Vol. 33, No. 9, September 1995
Ardey N. and Mayinger F., Flame Acceleration by Turbulent Promotion and Jet Ignition, submitted to Progress in Energy and Combustion Science, Pergamon Press, Oxford, 1998
Jordan M. et al., Influence of Turbulence on the Deflagrative Flame Propagation in Lean Premixed Hydrogen Air Mixtures, FISA-97Symposium on EU Research on Severe Accidents, Luxembourg, 1997
Jordan M., Ardey N., Mayinger F., Effect of Turbulent Transport and Mixing on Flame Acceleration through Highly Blocking Obstacles, 11th International Heat Transfer Conference, Korea, 1998
Kuo K. K., Principles of Combustion, John Wiley & Sons, New York, 1986
Klein R., Breitung W., Rehm W., Olivier H., He L., Armand P., Ang M., Models and Criteria for Prediction of Deflagration-to-Detonation Transition (DDT) in Hydrogen-Air-Steam Systems under Severe Accident Conditions, FISA-97 Symposium, Luxembourg, 1997
Chan C. K., Lau D., Radford D., Transition to Detonation Resulting from Burning in a Confined Vortex, 23rd International Symposium on Combustion, The Combustion Institute, pp. 1797–1804, 1990
Dupré G., Unstable Detonations in the Near-limit Regime in Tubes, 23rd International Symposium on Combustion, The Combustion Institute, pp. 1813–1820, 1990
Vendel J., Armand P., Large Scale Hydrogen-Air-Steam DDT Experiments in the RUT Facility, Hydrogen Combustion Work Group Meeting, Nuclear Safety and Protection Institute, Tokyo, 1978
Peters N., Laminar Flamelet Concepts in Turbulent Combustion, 21st. International Symposium on Combustion, The Combustion Institute, Pittsburgh, 1986
Ciccarelli A., Ginsberg T., Boccio J., Economos C., Sato K., Kinoshita M., Detonation Cell Size Measurements and Predictions in Hydrogen-Air-Steam Mixtures at Elevated Temperatures, Combustion and Flame Vol. 99, pp. 212–220, 1994
Desbordes D., Critical Initiation Conditions for Gaseous Diverging Spherical Detonations, Journal de Physique IV, Colloque C4, suplément au Journal de Physique III, Vol. 5, 1995
Abdel-Gayed R. G., Bradley D., Combustion Regimes and the Straining of Turbulent Premixed Flames, Combustion and Flame, Vol. 76, pp. 213–218, 1989
Eckbreth A. C., Laser Diagnostics for Combustion Temperature and Species, Abacus Press, Tunbridge Wells, UK, 1988
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1999 Springer Science+Business Media Dordrecht
About this chapter
Cite this chapter
Gerlach, C., Eder, A., Jordan, M., Ardey, N., Mayinger, F. (1999). Advances in Understanding of Flame Acceleration for the Improving of Combustion Efficiency. In: Kakaç, S., Bergles, A.E., Mayinger, F., Yüncü, H. (eds) Heat Transfer Enhancement of Heat Exchangers. Nato ASI Series, vol 355. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-9159-1_21
Download citation
DOI: https://doi.org/10.1007/978-94-015-9159-1_21
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-5190-5
Online ISBN: 978-94-015-9159-1
eBook Packages: Springer Book Archive