This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Effects of Spray Angle and Piston Bowl Shape on Diesel Engine Soot Emissions Using 3-D CFD Simulation
Technical Paper
2005-01-2117
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
In an HSDI Diesel engine, fuel can be injected to the combustion chamber earlier as a strategy to reduce NOx and soot emissions. However, in the case of early injection the in-cylinder pressure and temperature during injection are much lower than those of normal injection conditions. As a result, wall impingement can occur if the conventional spray angle and piston bowl shape are maintained. In this study, 3-D CFD simulation was used to modify the spray angle of the injector and the piston bowl shape so that wall impingement was minimized, and soot emissions were reduced. The wall impingement model was used to simulate the behavior of impinged droplets. In order to predict the performance and emissions of the engine, a flamelet combustion model with the kinetic chemical mechanism for NOx and soot was used. A reduction in soot emissions was achieved with the modification of the spray angle and piston bowl shape.
Recommended Content
Authors
Topic
Citation
Lim, J. and Min, K., "The Effects of Spray Angle and Piston Bowl Shape on Diesel Engine Soot Emissions Using 3-D CFD Simulation," SAE Technical Paper 2005-01-2117, 2005, https://doi.org/10.4271/2005-01-2117.Also In
References
- Dec J. et al. “Homogeneous Charge Compression Ignition (HCCI) Engines: Key Research and Development Issues” SAE PT-94 145 162 2003
- Matsui, Y. Sugihara, K. “Sources of Hydrocarbon Emissions from a Small Direct Injection Diesel Engines,” JSAE Review 1986 7 4 11
- Beale, J. Reitz, R. “Modeling Spray Atomization with the Kelvin-Helmholtz/Rayleigh-Taylor Hybrid Model” Atomization and Spray 9 623 650 1999
- O'Rourke, P. J. “Collective Drop Effects on Vaporising Liquid Sprays,” Princeton University 1981
- Ryu, J. Kim H. Lee, K. Cho, H. “A study on the spray structure and evaporation characteristic of common rail type high pressure injector in homogeneous charge compression ignition engine” The 9th Annual Conference on Liquid Atomization and Spray Systems- Asia 265 272 2004
- Poling, B. E. Praustiz, J. M. O'connel, J. P. “The Properties of Gases and Liquids : Fifth Edition” Mcgraw-Hill 2001
- Spalding, D. B. “The Combustion of Liquid Fuels” Fourth Symposium (International) on Combustion The Combustion Institute Pittsburge, Penn. 1953
- El Wakil, M.M. Ueyhara, O.A. Myers, P.S. “A theoretical investigation of the heating-up period of injected fuel droplets vaporizing in air” NACA Technical Note 3179 1954
- Kim, M. Min, K. “Calculation of Fuel Spray Impingement and Fuel Film Formation in an HSDI Diesel Engine” KSME International Journal 16 3 376 358 2002
- Stanton, D. W. Ruthland, C. J. “Mathematical Modeling of Wall Films Formed by Impinging Sprays” SAE Paper No. 960628 1996
- Ghadiri, H. “Raindrop Impact, Soil Splash and Cratering” University of Reading 1978
- Peters, N. “Laminar Diffusion Flamelet Models in Non-Premixed Turbulent Combustion” Prog. Energy Combust. Sci. 10 319 339 1984
- Peters, N. “Local quenching due to flame stretch and non-premixed turbulent combustion” Combust. Sci. and Tech. 30 1 17 1983
- Peters, N. “Turbulent Combustion” Cambridge University Press 2000
- Barths, H. Peters, N. “Three-dimensional modeling of NOx and soot formation in DI-diesel engines using detailed chemistry based on the interactive flamelet approach” SAE Paper 962057
- Pitsch, H. Peters, N. “Investigation of the ignition process of sprays under Diesel engine conditions using reduced n-heptane chemistry” SAE Paper 982464
- Tao, F. Golovitchev, V., I. Chomiak, J. “Application of Complex Chemistry to Investigate the Combustion Zone Structure of DI Diesel Sprays under Engine-Like Conditions” The Fifth International Symposium on Diagnostics and Modeling of Combustion in Internal Combustion Engines (COMODIA 2001) 92 100 2001
- Hewson, J. “Pollutant Emissions from Nonpremixed Hydrocarbon Flames” UC San Diego 1997
- Hergart, C. Barths, H. Peters, N. “Modeling the Combustion in a Small-Bore Diesel Engine Using a Method Based on Representative Interactive Flamelets” SAE Paper 1999-01-3550
- Flynn, P., F. Durrett, R.,P. Hunter, G., L. Loye, A., O. Akinyemi, O., C. Dec, J., E. Westbrook, C., K. “Diesel Combustion: An Integrated View Combining Laser Diagnostics, Chemical Kinetics, And Empirical Validation” SAE Paper 1999-01-0509