THERMAL SCIENCE

International Scientific Journal

MODELING THE EFFECT OF SPRAY/WALL IMPINGEMENT ON COMBUSTION PROCESS AND EMISSION OF DI DIESEL ENGINE

ABSTRACT
This work is presented to study the effect of spray impinging on the combustion process and emissions in a direct injection diesel engine at various engine speeds. Computations are carried out using a three-dimensional modeling for sprays, spray-wall interactions, flow field, emission, and combustion process. Results indicate an increase in engine speed leads to increased spray impinging (wall film formation), turbulence intensity and average wall temperature in cylinder. The enhanced air/fuel mixing and intensified evaporation of wall film decreases soot emission by reducing the extent of the fuel rich regions specially in impinging zones. Also at higher engine speeds, combustion is delayed and fuel is consumed in a shorter time period by the enhanced air and fuel mixing. The shorter combustion duration provides less available time for soot and NOx formations. However, only a few attempts have been made to address the effect of impingement of spray with piston walls on the emissions and combustion process. The results of model in addition to approving the corresponding data in the literature are also compared with the experimental data and shown good agreement.
KEYWORDS
PAPER SUBMITTED: 2008-11-30
PAPER REVISED: 2009-04-06
PAPER ACCEPTED: 2009-07-19
DOI REFERENCE: https://doi.org/10.2298/TSCI0903023J
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2009, VOLUME 13, ISSUE 3, PAGES [23 - 34]
REFERENCES
  1. Uludogan, A., Foster, D. E., Reitz, R. D., Modeling the Effect of Engine Speed on the Combustion Process and Emissions in a DI Diesel Engine, SAE paper 962056
  2. Heywood, J. B., Internal Combustion Engine Fundamental, McGraw Hill Book Company, New York, USA, 1988
  3. Gosman, A. D., Computer Modeling of Flow and Heat Transfer in Engines, Progress and Prospects, Imperil College of Science and Technology, London
  4. Jeske Felix, R., et al., Modeling of the Natural Gas Injection Process in a Two-Stroke Diesel Engine, SAE Paper 920192
  5. Choi, W., et al., In-Cylinder Flow Field Analysis of a Single Cylinder DI Diesel Engine Using PIV and CFD, SAE paper 2003-01-1846
  6. Patterson, M. A., et al., Modeling the Effects of Fuel Injection Characteristics on Diesel Engine Soot and NOx Emissions, SAE paper 940523
  7. Meingast, U., Staudt, M., et al., Analysis of Spray/Wall Interaction under Diesel Engine Conditions, SAE paper 2000-01-0272
  8. Beatrice, C., et al., An Assessment of Predictivity of CFD Computations of Combustion and Pollutants Formation in DI Diesel Engines, SAE paper 962055
  9. Yoshizaki, T., Nishida, K., Hiroyasu, H., Three-Dimensional Spray Distributions in a Direct Injection Diesel Engine, SAE paper 941693
  10. Urlaub, A. G., Chmela FG High-Speed Multi-Fuel Engine: L9204 FMV, SAE paper 740122, 1974
  11. Mohammadi, A., Kidoguchi, Y., Miwa, K., Effect of Injection Parameters and Wall-Impingement on Atomization and Gas Entrainment Processes in Diesel Sprays, SAE paper 2002-01-0497
  12. Allocca, L., De Vita, A., Di Angelo, L., Wall-Impingement Analysis of a Spray from a Common Rail Injection System for Diesel Engines, Proceedings, THIESEL 2002 Conference on Thermo- and Fluid Dynamic Processes in Diesel Engines, Instituto Motori CNR, Italy, pp. 67-76
  13. Baumgarten, C., Mixture Formation in Internal Combustion Engines, Springer Verlag, Berlin, 2006
  14. ***, AVL FIRE User Manual V. 3; 2006
  15. Pirouzpanah, V., Kashani, B. O., Prediction of Major Pollutants Emission in Direct-Injection Dual-Fuel Diesel and Natural Gas Engines, SAE paper 1999-01-0841, 1999
  16. Dukowicz, J. K., Quasi-Steady Droplet Change in the Presence of Convection, Informal Report Los Alamos Scientific Laboratory, LA7997-MS, Los Alamos, N. Mex., USA
  17. Naber, J. D., Reitz, R. D., Modeling Engine Spray/Wall Impingement, SAE paper 880107
  18. Mundo, C., Sommerfeld, M., Tropea, C., Droplet-Wall Collisions: Experimental Studies of the Deformation and Breakup Process, Int. J. Multiphase Flow, 21 (1995), 2, pp. 151-173
  19. Mundo, C., Sommerfeld, M., Tropea, C., Experimental Studies of the Deposition and Splashing of Small Liquid Droplets Impinging on a Flat Surface, Paper I-18, ICLASS-94, Rouen, France, 1994

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