Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지

Multidimensional Engine Modeling: NO and Soot Emissions in a Diesel Engine with Exhaust Gas Recirculation

  • Kim, Hongsuk (Graduate School of Mechanical Engineering, Sunkyunkwan University) ;
  • Nakwon Sung (School of Mechanical Engineering, Sunkyunkwan University)
  • Published : 2001.08.01
Download PDF
⟨ Previous Next ⟩

Abstract

The effects of EGR(Exhaust Gas Recirculation) on heavy-duty diesel engine performance, NO and soot emissions were numerically investigated using the modified KIVA-3V code. For the fuel spray, the atomization model based on the linear stability analysis and spray wall impingement model were developed for the KIVA-3V code. The Zeldovich mechanism for the formation of nitric oxide and the soot model suggested by Hiroyasu et al. were used to predict the diesel emissions. In this paper, the computational results of fuel spray, cylinder pressure, and emissions were compared with experimental data, and the optimum EGR rates were sought from the NO and soot emissions trade-off. The results showed that the EGR is effective in suppressing NO but the soot emission was increased considerably by EGR. Using cooled EGR, soot emission could be enhanced without worsening of NO.

Keywords

References

  1. Alloca L., Corcione F. E., and Fusco A., 1995 'Modeling of Diesel Spray Dynamics and Comparison with Experiments,' SAE Paper, No. 941895
  2. Amsden A. A., 1997, 'KIVA-3V: A Block Structured KIVA Program for Engines With Vertical of Canted Valves,' Los Alamos National Laboratory report LA-13313-MS (July)
  3. Chehroudi B. and Bracco F.V., 1985, 'On the Intact Core of Full Cone Sprays,' Soc. Sutomot Eng. Tech. 850126
  4. Dan T., Takagishi S., Senda J., and Fujimoto H., 1997, Effect of Ambient Gas Properties for Characteristics of Non-Reacting Diesel Fuel Spray, SAE Paper No. 970652
  5. Hardenberg H. O., and Hase F. W., 1981, 'Ignition Improvers for ethanol Fuels,' SAE Paper No. 810249
  6. Hiroyasu H., and Nishida K., 1989, 'Simplified Three-Dimensional Modelling of Mixture Formation and Combustion in a D.I.Diesel Engine,' SAE Paper No. 890269
  7. Kim S., 1996, 'Study on the High Pressure Injection and the Reduction of Regualted Emissions in D. I. Diesel Engine,' Ph. D. thesis, seoul National Univ
  8. Kohketsu S., Mori K., Sakai K., and Hakozaki T., 1997, 'EGR Technologies for a Turbocharged and Intercooled Heavy-Duty Diesel Engine,' SAE Paper No. 970340
  9. Liu A.B., Mather D., and Reitz R.D., 1993, 'Modeling the Effects of Drop Drag and Breakup on Fuel Sprays,' SAE Paper No. 930072
  10. Park K., and Watkins A.P., 1996, 'Assessment and Application of a New Spray Wall Impaction Model,' IMechE C499/044/96
  11. Taylor G.I., 1962, 'Generation of Ripples by Wind Blowing over Viscous Fluids,' pp. 244-254, Cambridge Univ. press
  12. Tsunemoto H. and Ishitani H., 1980, 'The Role of Oxygen in Intake and Exhaust on No Emission, Smoke and BMEP of a Diesel Engine with EGR system,' SAE Paper No. 800030
  13. Zelenka P., Aufinger H., Reczek W. and Cartellier W., 1998, 'Cooled EGR-A Key Technology for Future Efficient HD Diesels,' SAE Paper No. 980190