NAFEMS International Journal of CFD Case Studies

Volume 8, January 2009

ISSN 1462-236X

3D-CFD Simulation of Mixture Formation, Combustion and Heat Transfer Processes with AVL FIRE

Reinhard Tatschl
Advanced Simulation Technologies, AVL List GmbH, A-8020 Graz, Austria

https://doi.org/10.59972/r5w8vet6

Keywords: CFD, IC-Engines, Spray Injection, Combustion, Emissions and Thermal Analysis

Abstract

Based on selected examples the present status of 3D-CFD related to internal combustion engine applications is presented. The focus is on highlighting the current status of model validation and on demonstrating specific application methodologies using the CFD code AVL FIRE.
From the broad area of diesel engine combustion system development, results of the analysis and optimization of mixture formation, combustion and pollutant formation are shown for conventional as well as alternative diesel combustion. The results quality related to the prediction of the in-cylinder pressure trace, heat release rate and pollutants is discussed in the context of related experimental data.
In the field of gasoline engine development, the present possibilities related to 3D-CFD calculation of premixed flame propagation for the analysis and optimization of full load SI-engine combustion performance is presented. The applicability of the adopted models as well as their predictive capabilities are demonstrated based upon selected results of calculated flame propagation and knock onset characteristics and comparison of the results with related experimental data.
Finally, the possibilities of 3D-CFD in the context of the analysis and optimization of the thermal loading of structural components are presented. The application of novel models for the calculation of the gas- and water-side heat transfer including coupled fluid / thermal calculations is demonstrated for the thermal analysis of the head-block compound of a passenger car SI-engine.

References

[1] AVL FIRE v8.5 Manual, AVL List GmbH, Graz, 2006

[2] Dukowicz, J.K., “A Particle-Fluid Numerical Model for Liquid Sprays”, Journal of Computational Physics, Vol. 35, pp. 229-253, 1980.

[3] Colin, O., Benkenida, A., “The 3-Zones Extended Coherent Flame Model (ECFM3Z) for Computing Premixed / Diffusion Combustion”, Oil & Gas Science and Technology – Rev. IFP, Vol. 59, No. 6, pp. 593-609, 2004

[4] Priesching, P, Ramusch, G. Ruetz, J., Tatschl, R., “3D-CFD Modeling of Conventional and Alternative Diesel Combustion and Pollutant Formation – A Validation Study”, JSAE 2007-72-85, 2007

[5] Tatschl, R., Priesching, P., Ruetz, J., Kammerdiener, Th., “DoE Based CFD Analysis of Diesel Combustion and Pollutant Formation“, SAE-2007-24-0048, 2007

[6] Patel, S.N.D.H., Bogensperger, M., Tatschl, R., Ibrahim, S.S., Hargrave, G.K., “Coherent Flame Modeling of Turbulent Combustion – A Validation Study“, Proc. 2nd M.I.T. Conference on Computational Fluid and Solid Mechanics, Boston MA, June 17-20, 2003

[7] Halstead, M.P., Kirsch, L.J., Prothero, A., Quinn, C.P., ”A Mathematical Model for Hydrocarbon Autoignition at High Pressures”, Proc. R. Soc. Lond. A., 364, pp.515-538, 1975

[8] Tatschl, R., Bogensperger, M., Kotnik, G., Gouda, M., “Flame Propagation and Knock Onset Analysis For Full Load SI-Engine Combustion Optimisation”, Proc. International Multidimensional Engine Modelling User’s Group Meeting, Detroit, MI, 2005

[9] Philipp, H., Plimon, A., Fernitz, G., Hirsch, A., Fraidl, G., Winklhofer, E.: “A Tomographic Camera System for Combustion Diagnostics in SI Engines”, SAE 950681, 1995

[10] Hanjalic, K., Popovac, M. and Hadziabdic, M., “A Robust Near-Wall Elliptic-Relaxation Eddy-Viscosity Turbulence Model for CFD”, Int. J. Heat Fluid Flow, 25, pp. 897-901, 2004

[11] Popovac, M. and Hanjalic, K., “Compound Wall Treatment for RANS Computation of Complex Turbulent Flow”, Proc. 3rd M.I.T. Conference, Boston, USA, 2005

[12] Tatschl, R., Basara, B., Schneider, J., Hanjalic, K., Popovac, M., Brohmer, A., Mehring, J., “Advanced Turbulent Heat Transfer Modeling for IC-Engine Applications”, Proc. International Multidimensional Engine Modelling User’s Group Meeting, Detroit, MI, 2006

Cite this paper

Reinhard Tatschl, 3D-CFD Simulation of Mixture Formation, Combustion and Heat Transfer Processes with AVL FIRE, NAFEMS International Journal of CFD Case Studies, Volume 8, 2009, Pages 51-63, https://doi.org/10.59972/r5w8vet6