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Article Dans Une Revue Proceedings of the Combustion Institute Année : 2007

Towards large eddy simulation of combustion in spark ignition engines

Résumé

Internal combustion engine simulations are commonly performed using the RANS (Reynolds averaged Navier–Stokes) approach. It gives a correct estimates of global quantities but is by nature not adapted to describe phenomena strongly linked to cyclic variations. On the other hand, large eddy simulation (LES) is a promising technique to determine successive engine cycles. This work demonstrates the feasibility of LES engine cycles simulation by using a flame surface density (FSD) approach. This approach, presented in a first section, combines an Eulerian spark ignition model derived from the RANS AKTIM model [J.M. Duclos, O. Colin, Arc and Kernel Tracking Ignition Model for 3D SI Engines Calculations, Comodia, Nagoya, Japan, 2001, pp. 343–350] and a Coherent Flame Model (CFM) [S. Candel, T. Poinsot, Combust. Sci. Tech. 70 (1990) 1–15; O. Colin, A. Benkenida, C. Angelberger, Oil & Gas Sci. Techn.—Rev. IFP 58 (1) (2003) 47–32] describing the flame propagation. The CFM model, commonly used in RANS simulations, is here formulated in a LES context. In a second part, the whole ignition-combustion model is validated against an experiment relative to the turbulent ignition and flame propagation of a stoichiometric propane-air mixture [B. Renou, A. Boukhalfa, Combust. Sci. Tech. 162 (2001) 347–371]. Finally, LES engine cycles simulations are performed on a real engine configuration. First, the sensitivity of the model to the LES combustion filter size ^D is examined, showing a weak dependence of the modelling approach to D. Then results are compared to those obtained with the algebraic model for the FSD proposed by Boger et al. [M. Boger, D. Veynante, H. Boughanem, A. Trouve´, Proc. Combust. Inst. 27 (1998) 917–925] and the need for non-equilibrium combustion models is demonstrated.

Dates et versions

hal-00271669 , version 1 (09-04-2008)

Identifiants

Citer

Stéphane Richard, Olivier Colin, Olivier Vermorel, Adlène Benkenida, Christian Angelberger, et al.. Towards large eddy simulation of combustion in spark ignition engines. Proceedings of the Combustion Institute, 2007, 31 (2), pp.3059 - 3066. ⟨10.1016/j.proci.2006.07.086⟩. ⟨hal-00271669⟩
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