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Fuel Motion and Pollutant Formation in Stratified Charge Combustion
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English
Abstract
The concept of charge stratification is examined, using a numerical model for fluid mechanics and chemical kinetics. Initially homogeneous and stratified charge cases are discussed and compared, and simplified global rate expressions for the chemical reactions are compared with a detailed reaction mechanism. Results computed for the stratified models indicate that the fuel can be completely burned before it reaches the walls of the combustion chamber, effectively eliminating wall quenching as a source of unburned hydrocarbon emissions. However, volume flame quenching appears to result in unacceptably large amounts of unburned fuel in the stratified models.
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Citation
Westbrook, C., "Fuel Motion and Pollutant Formation in Stratified Charge Combustion," SAE Technical Paper 790248, 1979, https://doi.org/10.4271/790248.Also In
References
- Westbrook Charles K. “Propagation of a Flame Through a Stratified Charge Combustion Chamber” Acta Astronautica University of California Lawrence Livermore Laboratory report UCRL-79094 August 1977
- JANAF Thermochemical Tables Dow Chemical Company Midland, Michigan 1974
- Westbrook Charles K. “A Generalized ICE Method for Chemically Reactive Flows in Combustion Systems” J. Computational Physics
- Westbrook C. K. Chase L. L. “A One-Dimensional Combustion Model” University of California Lawrence Livermore Laboratory report UCRL-52297 July 1977
- Westbrook C. K. Dryer F. L. “A Comprehensive Mechanism for Methanol Oxidation” University of California Lawrence Livermore Laboratory report UCRL-81541 July 1978
- Westbrook Charles K. “An Analytical Study of the Shock Tube Ignition of Mixtures of Methane and Ethane” Combustion Institute Western States Section Laguna Beach, California October 1978 University of California Lawrence Livermore Laboratory report UCRL-81507 July 1978
- Dryer F. L. Glassman I. “The High Temperature Oxidation of Carbon Monoxide and Methane” Fourteenth Symposium (International) on Combustion The Combustion Institute Pittsburgh 1973