This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Oxidation of Hydrocarbons Released from Piston Crevices of S.I. Engines
Annotation ability available
Sector:
Language:
English
Abstract
This work presents a numerical method for predictions of HC oxidation in the cold turbulent wall jet emerging from the piston top land crevice in an S.I. engine, using a complex chemical reaction model. The method has been applied to an engine model geometry with the aim to predict the HC oxidation rate under engine - relevant conditions. According to the simulation a large amount of HC survives oxidation due to the long ignition delay of the wall jet emitted from the crevice. This ignition delay, in turn depends mainly on chemical composition and temperature of the gas mixture in the crevice and also on the temperature distribution in the cylinder boundary layer.
Authors
Topic
Citation
HellstrÖm, T. and Chomiak, J., "Oxidation of Hydrocarbons Released from Piston Crevices of S.I. Engines," SAE Technical Paper 952539, 1995, https://doi.org/10.4271/952539.Also In
References
- Min K. “The Effects of Crevices on the Engine-out Hydrocarbon Emissions in Spark Ignition Engines” Department of Mechanical Engineering, MIT 1993
- Karlsson J. A. J. Berglind T. Chomiak J. “Modeling of Ignition and Combustion of High Pressure Small Orifice Diesel Sprays Using a Complex Chemical Model” International Symposium COMODIA 94 1994
- Hansbo P. Szepessy A. “A Velocity-Pressure Streamline Diffusion Finite Element Method for the Incompressible Navier-Stokes Equations” Comput. Methods Appl. Mech. Engrg 84 175 192 1990
- Hansbo P. “The Characteristic Streamline Diffusion Method for Convection-Diffusion Problems” Comput. Methods Appl. Mech. Engrg 96 239 253 1992
- Yang Z. Shih T. H. “New Time Scale Based k - ε. Model for Near-Wall Turbulence” AIAA J. 31 7 1191 1190 1993
- Ciezki, H. K. Adomeit G. 1993 “Shock Tube Investigation of Self-Ignition of n-Heptane - Air Mixtures Under Engine Relevant Conditions” Combustion and Flame 93 421 433
- Magnussen, B. F. Hjertager, H. “On Mathematical Modeling of Turbulent Combustion with Special Emphasis on Soot Formation and Combustion” 16th Symposium (International) on Combustion The Combustion Institute Pittsburgh 719 1976
- Hellström T. Chomiak J. 1995 “Predictions of Hydrocarbon Combustion in a Turbulent Wall Jet Using a Complex Chemical Model Tenth Symposium on Turbulent Shear Flows 19-13 19-16 1995
- Hindmarsh, A. “Odepack, a Systematized Collection of ODE Solvers” Scientific Computing Stepleman et al. North-Holland, Amsterdam 55 64 1983
- Min K. Cheng W.K. “In-Cylinder Oxidation of Piston-Crevice Hydrocarbon in SI Engines” International Symposium COMODIA 94 1994