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Soot Simulation under Diesel Engine Conditions Using a Flamelet Approach
- Galin Nakov - BTU Cottbus ,
- Fabian Mauss - BTU Cottbus ,
- Paul Wenzel - Daimler AG ,
- Rüdiger Steiner - Daimler AG ,
- Christian Krüger - Daimler AG ,
- Yongzhe Zhang - CD-adapco ,
- Rajesh Rawat - CD-adapco ,
- Anders Borg - LOGE AB ,
- Cathleen Perlman - LOGE AB ,
- Karin Fröjd - LOGE AB ,
- Harry Lehtiniemi - LOGE AB
ISSN: 1946-3936, e-ISSN: 1946-3944
Published November 02, 2009 by SAE International in United States
Citation: Nakov, G., Mauss, F., Wenzel, P., Steiner, R. et al., "Soot Simulation under Diesel Engine Conditions Using a Flamelet Approach," SAE Int. J. Engines 2(2):89-104, 2010, https://doi.org/10.4271/2009-01-2679.
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  is used to resolve the flowfield. Soot is modeled using a detailed kinetic soot model described by Mauss . 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. . 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.