This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Investigation of Effects of Piston Bowl and Fuel Injector Offsets on Combustion and Emissions in D.I. Diesel Engines
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 06, 2002 by SAE International in United States
Annotation ability available
The effects of piston bowl and fuel injector offsets on combustion and emissions in a D.I. diesel engine have been investigated by using a KIVA CFD code. In this investigation, modeling combustion and emissions in the diesel engine at different regimes is performed, including the model of the single spray sector without piston bowl and fuel injector offsets, the model of the full cylinder of 360 degrees without piston bowl and fuel injector offsets, and the model of the full cylinder of 360 degrees with both a piston bowl offset and a fuel injector offset, respectively. In addition, the corresponding experiments are conducted to validate the modeling. The fuel spray patterns are compared for different models. The cylinder pressure, the heat release rate, and the emissions of NOx and soot are examined. From inspection of the calculated results, it is found that the computational results are in good agreement with the experimental data for the cylinder pressure, the heat release rate, and the emissions of NOx and soot. The results from the models of the full cylinder of 360 degrees with/without piston bowl and fuel injector offsets show some difference from those from the model of the single spray sector without piston bowl and fuel injector offsets. But this discrepancy may be accepted for most engineering practices. Therefore, it is concluded that in practical applications, the model of the single spray sector without piston bowl and fuel injector offsets can be used, which will greatly reduce the computation time without causing large errors. Only in some special cases, is it necessary to use the full cylinder of 360 degrees with piston bowl and fuel injector offsets to obtain local details.
CitationLiu, Z. and Gui, X., "Investigation of Effects of Piston Bowl and Fuel Injector Offsets on Combustion and Emissions in D.I. Diesel Engines," SAE Technical Paper 2002-01-1748, 2002, https://doi.org/10.4271/2002-01-1748.
- Murayama, T. Simultaneous reduction of NOx and smoke of diesel engines without sacrificing thermal efficiency JSME International Journal 37 1 1994
- Liu, Z. Reitz, R.D. Modeling Fuel Spray Impingement and Heat Transfer between Spray and Wall in Direct Injection Diesel Engines Numerical Heat transfer, Part A 28 515 529 1995
- Senecal, P.K. Uludogan, A. Reitz, R.D. development of novel direct-injection diesel engine combustion chamber designs using computational fluid dynamics SAE Paper 971594 1997
- Reitz, R.D. Rutland, C.J. “Development and Testing of Diesel Engine CFD Models,” Prog. Energy Combust. sci. 21 173 196 1995
- Amsden, A.A. O'Rourke, P.J. Buller, T.D. KIVA II-A Computer Program for Chemically Reactive Flows with Sprays Los Alamos National Labs., Rept. LA-11560-MS 1989
- Han, Z. Reitz, R.D. “Turbulence Modeling of Internal Combustion Engines Using RNG models,” Combust. Sci. and Tech. 106 267 295 1995
- Reitz, R.D. Modeling Atomization Processes in High-Pressure Vaporizing Sprays Atomization and Spray Technology 3 309 337 1987
- Kong, S.-C. Han, Z. Reitz, R.D. The development and application of a diesel ignition and combustion model for multidimensional engine simulation SAE Paper 950278 1995
- Su, T.F. Patterson, M.A. Reitz, R.D. Farrell, P.V. “Experimental and Numerical Studies of High Pressure Multiple Injection Sprays,” SAE Technical Paper 960861 1996
- Halstead, M. Kirsh, L. Quinn, C. The autoignition of hydrocarbon fuels at high temperatures and pressures - fitting of a mathematical model Combus. Flame 30 45 60 1977
- Abraham, J. Bracco, F.V. Reitz, R.D. Comparisons of computed and measured premixed charge engine combustion Combus. Flame 60 309 322 1985
- Bowman, C.T. Kinetics of pollutant formation and destruction in combustion Prog. Energy Combus. Sci. 1 33 45 1975
- Hiroyasu, H. Kadota, T. Models for combustion and formation of nitric oxide and soot in DI diesel engines SAE Paper 760129 1976
- Nagle, J. Strickland-Constable, R.F. Oxidation of carbon between 1000-2000 C Proc. Of the Fifth Carbon Conf. 1 154 1962