International Scientific Journal


The experimental measures of chemical species and turbulence intensity during the closed part of the engine combustion cycle are today unattainable exactly. This paper deals with numerical investigations of an experimental direct injection Diesel engine and a commercial turbocharged heavy duty direct injection one. Simulations are carried out with the kiva3v2 code using the RNG (k-ε) model. A reduced mechanism for n-heptane was adopted for predicting auto-ignition and combustion processes. From the calibrated code based on experimental in-cylinder pressures, the study focuses on the turbulence parameters and combustion species evolution in the attempt to improve understanding of turbulence-chemistry interaction during the engine cycle. The turbulent kinetic energy and its dissipation rate are taken as representative parameters of turbulence. The results indicate that chemistry reactions of fuel oxidation during the auto-ignition delay improve the turbulence levels. The peak position of turbulent kinetic energy coincides systematically with the auto-ignition timing. This position seems to be governed by the viscous effects generated by the high pressure level reached at the auto-ignition timing. The hot regime flame decreases rapidly the turbulence intensity successively by the viscous effects during the fast premixed combustion and heat transfer during other periods. It is showed that instable species such as CO are due to deficiency of local mixture preparation during the strong decrease of turbulence energy. Also, an attempt to build an innovative relationship between self-ignition and maximum turbulence level is proposed. This work justifies the suggestion to determine otherwise the self-ignition timing.
PAPER REVISED: 2013-05-18
PAPER ACCEPTED: 2013-06-26
CITATION EXPORT: view in browser or download as text file
  1. Heywood, J.B., Internal Combustion Engine Fundamentals. Mc Graw-Hill. Inc., New York, USA, 1983.
  2. Günter P. M., Schwarz C., Stiesch G., Otto F., Simulating Combustion, Simulation of combustion and pollutant formation for engine-development. Springer-Verlag Berlin, Heidelberg, GERMANY, (2006).
  3. Bencherif, M., Liazid, A. and Tazzerout, M., Pollution duality in turbocharged heavy duty diesel engine. Int. J. Vehicle Design, Vol. 50, 2009, Nos. 1/2/3/4, pp.182-195.
  4. Jafarmadar, S.,Khalilarya, S., Shafee, S., Barzegar, R., "Modeling the Effect of Spray/Wall Impingement on Combustion Process and Emission of DI Diesel Engine." Thermal Science volume 13, 2009, issue 3, pp 23 - 34.
  5. Amsden, A.A., O'Rourke, P.J. and Butler, T.D., KIVA-II: A Computer Program for Chemically Reactive Flows with Sprays. Los Alamos, NM: LA-11560-MS, Los Alamos National Laboratory, (1989).
  6. Amsden, A.A., KIVA-3, A KIVA Program with Block-structured Mesh for Complex Geometries, Technical Report, Los Alamos National Laboratory, LA-12503-MS, (1993).
  7. Amsden, A.A., KIVA-3V, A Block-structured KIVA Program for Engines with Vertical or Canted Valves, Technical Report, Los Alamos National Laboratory, LA-13313-MS, (1997).
  8. Amsden, A.A., KIVA-3V, Released 2, Improvements to Kiva-3v, Technical Report, Los Alamos National Laboratory, LA-13608-MS, (1999).
  9. Golovitchev, V.I., Nordin, N., Jarnicki, R., Chomiak, J., 3-D Diesel Spray Simulations using a New Detailed Chemistry Turbulent Combustion Model. SAE, 2000, paper 00FL-447.
  10. Jarnicki, R., Teodorczyk, A., Golovitchev, V.I. Chomiak, J., Numerical Simulation of Spray Formation, Ignition and Combustion in a Diesel Engine, Using Complex Chemistry Approach. Journal of KONES. International Combustion Engines, Vol. 7, 2000, No 1-2, pp 247-257.
  11. Golovitchev, V.I., Atarashiya, K., Tanaka, K., and Yamada, S., Towards Universal EDCBased Combustion Model for Compression Ignited Engine Simulations. JSEA, 2003-0181. SAE, 2003-01-1849.
  12. Reitz, R.D., Rutland, C.J., Development and testing of diesel engine CFD models. Progress in Energy and Combustion Science, 1995, Vol. 21, pp.173-196.
  13. Golovitchev, V.I., Nordin, N., Jarnicki, R., Chomiak, J., 3-D Diesel Spray Simulations Using a New Detailed Chemistry Turbulent Combustion Model. SAE, 2000, paper 2000-01-1891.
  14. Golovitchev, V.I., Revising "Old" good models: Detailed chemistry spray combustion modeling based on eddy dissipation concept. 5th International conference ‘Internal combustion engine', September 23-27, 2001, Capri-Naples, Italy.
  15. Golovitchev, V.I., Tao, F, Chomiak, J., Numerical Evaluation of Soot Formation Control at Diesel -Like Conditions by Reducing Fuel Injection Timing; SAE, 1999, Paper 1999-01-3552.

© 2022 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence