This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Model for predicting air-fuel mixing, combustion and emissions in DI diesel engines over whole operating range
Technical Paper
2005-01-2119
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
A multi-zone model of diesel sprays evolution and combustion named as RK-model has been developed. The model with submodels of NO and soot formation has been implemented into ICE thermodynamic analysis software (DIESEL-RK). The RK-model takes into account: the shape of injection profile, including split injection; drop sizes; direction of each spray in the combustion chamber; the swirl intensity; the piston bowl shape. Evolution of wall surface flows generated by each spray depends on the spray and wall impingement angle and the swirl intensity. Interaction between near-wall flows (further named wall surface flows) generated by the adjacent sprays is taken into account. The method considers hitting of fuel on the cylinder head and liner surfaces. The evaporation rate in each zone is determined by Nusselt number for the diffusion process, the pressure and the temperature, including temperatures of different walls where a fuel spray gets. A parametric study of the swirl intensity effect has been performed and a good agreement with experimental data was obtained. The calculations results allow describing the phenomenon of increased fuel consumption with increase of swirl ratio over the optimum value. The model has been used for simulation of different engines performances. The calculated results obtained for high-speed, truck and medium-speed diesels have shown a good agreement of SFC, power, smoke and NO emissions with the experimental data over the whole operating range, including modes of idling and 7…10% capacity. The model does not require recalibration for different operating modes of a diesel engine.
Recommended Content
Authors
Citation
Kuleshov, A., "Model for predicting air-fuel mixing, combustion and emissions in DI diesel engines over whole operating range," SAE Technical Paper 2005-01-2119, 2005, https://doi.org/10.4271/2005-01-2119.Also In
References
- Hiroyasu Hiroyuki Kadota Toshikazu Arai Masataka “Development and Use of a Spray Combustion Modeling to Predict Diesel Engine Efficiency and Pollutant Emissions,” paper 214-12, Bull. JSME 26 214 576 583 1983
- Zeldovich Ya.B. Raizer Yu.P. “Physics of shock waves and high-temperature hydrodynamic phenomena” Moscow Nauka 686 1966
- Zvonov V.A. “Internal combustion engines toxicity” Moscow Mashinostroenie 200 1973
- Razleytsev N.F. “Combustion simulation and optimization in diesels” Kharkov Vischa shkola 169 1980
- Chui, W.S. Shahed, S.M. Lyn W.T. “A Transient Spray Mixing Model for Diesel Combustion” SAE Paper No 760128 1976
- Bi Xiaoping Yang Minggao Han Shu Ma Zhixiong “A multi-Zone Model for Diesel Spray Combustion” SAE Paper No 1999-01-0916 1999
- Rakopoulos C.D. Hountalas D.T. “Development and validation of a 3-D Multi-Zone Combustion Model for the Prediction of DI Diesel Engines Performance and Pollutants Emissions” SAE Paper No 981021 1998
- Kukushkin V.L. Romanov S.A. Sviridov Yu.B. “Measuring holographic system and diesel flame investigating procedure” Dvigatelestroenie 9 24 26 1983
- Kukushkin V.L. Romanov S.A. Sviridov Yu.B. “Experimental research into dispersed diesel fuel unsteady spray with holography” Dvigatelestroenie 2 3 7 1989
- Baev V.K. Bazhaykin A.N. Bichenkov E.I. et. al. “X-ray impulse method of studying fuel flame inner structure” Appl. mathematics and theor. physics 1 106 111 1980
- Astakhov I.V. Golubkov L.N. Trusov V.I. et. al. “Fuel systems and economical operation of diesels” Moscow 288 1990
- Kamimoto, T. Kobayashi, H. Matsuoka, S. “A Big Size Rapid Compression Machine for Fundamental Studies of Diesel Combustion” SAE Paper 811004 , SAE Trans. 90 1981
- Reitz, R.D. Bracco, F.V. “On the dependence of Spray Angle and Other Spray Parameters on Nozzle Design and Operating Conditions” SAE paper 790494 1979
- Bracco, F.V. “Modeling of Engine Sprays” SAE Paper No 850394 1985
- Kuo, T.W. Bracco, F.V. “Computations of Drop Sizes in Pulsating Sprays and of Liquid-Core Length in Vaporizing Sprays” SAE Paper No 820133 , SAE Trans. 91 1982
- Kaluzhin S.A. Romanov S.A. Sviridov Yu.B. “Experimental investigation into velocities of liquid and gaseous phases in diesel fuel flame” Dvigatelestroenie 7 5 8 1980
- Lyn, W.T. “Study of Burning Rate and Nature of Combustion in Diesel Engines” Proceedings of Ninth International Symposium on Combustion 1069 1082 The Combustion Institute 1962
- Heywood, J.B. Internal Combustion Engine Fundamentals McGraw-Hill New York 1988
- Dragunov G.D. Egorov V.V. “Some peculiarities of fuel moving along the combustion chamber surface” Izv. Vuzov, Mashinostroenie 1 119 122 1977
- Egorov V.V. “Investigation into peculiarities of fuel evaporation and working cycle in boosting the tractor diesel with the CNIDI combustion chamber” Leningrad 1978
- Ivanchenko N.N. Semenov B.N. Sokolov V.S. “Working process in diesels with piston bowl” Leningrad Mashinostroenie 228 1972
- Novoselov V.D. “Investigation into working process of four-stroke diesels based on ChN26/26 engines with mean effective pressure above 20 kg/cm 2 with limitations on maximum combustion pressure” Leningrad 1978
- Semenov B.N. “Theoretical and experimental fundamentals of applying fuels with various physical and chemical properties in high-speed diesels” Leningrad 1978
- Sokolov S.S. Demidova N.I. Safonov V.K. “Increase of diesel reliability by optimization of combustion chamber” Energomashinostroenie 2 12 14 1973
- Semenov B.N. Pavlov E.P. “Investigation and development of volume and film fuel-air mixing in diesels” Energomashinostroenie 1 7 10 1978
- Balles, E. “Fuel-Air Mixing and Diesel Combustion in a rapid Compression Machine” Department of Mechanical Engineering, MIT June 1987
- Gavrilov V.V. “Methods increasing quality of fuel-air mixing and combustion in a marine diesel based on mathematical and physical simulation of local intracylinder processes” Saint Petersburg StPbSMTU 2004
- Lyshevsky A.S. “Fuel atomization in marine diesels” Leningrad 248 1971
- Kuo, T.W. Bracco, F.V. “On the Scaling of Transient Laminar, Turbulent and Spray Jets” SAE Paper No. 820038 1982
- Hiroyasu, H. Kadota, T Arai, M. “Supplementary Comments: Fuel Spray Characterization in Diesel Engines” Combustion Modeling in Reciprocating Engines Mattavi, J.N. Amann, C.A. 369 408 Plenum Press N.Y. 1980
- Sviridov Yu.B. Malyavsky L.V. Vihert M.M. “Fuel and fuel supply in automotive diesels” Leningrad 224 1972