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Unburned Hydrocarbons in Closed Vessel Explosions, Theory versus Experiment Applications to Spark Ignition Engine Exhaust
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1967 by SAE International in United States
Annotation ability available
Experimentally determined and theoretically calculated concentrations of unburned fuel in the exhaust products of a combustion system amenable to theoretical calculations have been compared. Propane-air mixtures were spark-ignited in the center of spherical combustion bombs of various sizes. By this means, the relative importance of the quench phenomenon (a surface effect) has been evaluated. The results show that simple application of quench theory is not consistent with the experimental results. Use of a modified quench theory, based on the results from the bomb experiments, for theoretical calculations of unburned hydrocarbon in engine exhaust indicates that the exhaust unburned hydrocarbon concentration from a large-displacement, low-compression ratio engine should be much lower than that of a small-displacement, high-compression ratio engine.
CitationAgnew, J., "Unburned Hydrocarbons in Closed Vessel Explosions, Theory versus Experiment Applications to Spark Ignition Engine Exhaust," SAE Technical Paper 670125, 1967, https://doi.org/10.4271/670125.
- Friedman R. and Johnston W. C., “The Wall-Quenching of Laminar Propane Flames as a function of Pressure, Temperature, and Air-Fuel Ratio.” J. Appl. Phys., Vol. 21 1950, p. 791.
- Daniel W. A., “Flame Quenching at the Walls of an Internal Combustion Engine.” Sixth Symposium (International) on Combustion, New York: Reinhold Pub. Corp., 1957, p. 886.
- Daniel W. A. and Wentworth J. T., “Exhaust Gas Hydrocarbons -- Genesis and Exodus.” Paper 486B presented at SAE National Automobile Week, March 1962.
- Gottenberg W. G., Olsen D. R. and Best H. W., “Flame Quenching During High Pressure, High Temperature Combustion.” Combustion and Flame, Vol. VII, 1963, p. 9.
- Scheffler C.E., “Combustion Chamber Surface Area, a Key to Exhaust Hydrocarbons.” Paper 66011 presented at SAE Automotive Engineering Congress, January 1966.
- Agnew J. T., Bowlus D. A., Cudjoe A. A., Olsen R. A., and Drag E., “The Source of Unburned Hydrocarbons in Closed Vessel Explosions -- Applications to Spark Ignition Engine Exhaust.” Paper No. WSCI 65-18, Fall Meeting, Western States Section, The Combustion Institute, October 1965.
- Belles Frank E. and Sweet Clyde C., “Ignition and Flammability of Hydrocarbon Fuels.” NACA Report 1300, p. 83, Propulsion Chemistry Div., Lewis Flight Laboratory, Cleveland.
- Wohl Kurt, “Quenching, Flashback, Blow-off - Theory and Experiment.” Fourth Symposium (International) on Combustion, Baltimore, Md.: Williams and Wilkins Co., 1953, p. 68.
- Steffenson R. J., Agnew J. T., and Olsen R. A., “Combustion of Hydrocarbons -- Property Tables.” Purdue University Engineering Extension Series No. 122, May 1966.
- Agnew J. T. and Graiff L. B., “The Pressure Dependence of Laminar Burning Velocity by the Spherical Bomb Method.” Combustion and Flame, Vol. 5, No. 3, September 1961 p. 209.
- Huls T. A., Myers P. S. and Uyehara O. A., “Spark Ignition Engine Operation and Design for Minimum Exhaust Emission.” Paper 660405 presented at SAE Midyear Meeting, June 1966.