The subject of this work is 3D numerical simulations of combustion and soot emissions for a passenger car diesel engine. The CFD code STAR-CD version 3.26 [1] is used to resolve the flowfield. Soot is modeled using a detailed kinetic soot model described by Mauss [2]. The model includes a detailed description of the formation of polyaromatic hydrocarbons. The coupling between the turbulent flowfield and the soot model is achieved through a flamelet library approach, with transport of the moments of the soot particle size distribution function as outlined by Wenzel et al. [3]. In this work we extended this approach by considering acetylene feedback between the soot model and the combustion model. The model was further improved by using new gas-phase kinetics and new fitting procedures for the flamelet soot library. We investigated typical part-load operating points and a good agreement with the experimental data for soot in the exhaust gas was achieved when accounting for acetylene feedback.
Soot Simulation under Diesel Engine Conditions Using a Flamelet Approach
Sae Int. J. Engines
SAE 2009 Powertrains Fuels and Lubricants Meeting ; 2009
Sae International Journal of Engines ; 2 , 2 ; 89-104
2009-11-02
16 pages
Conference paper
English
Soot simulation under diesel engine conditions using a flamelet approach
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