This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Numerical Study on Knock for an SI Engine by Thermally Coupling Combustion Chamber and Cooling Circuit Simulations
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 03, 2003 by SAE International in United States
Annotation ability available
The present research focuses on the understanding and improved prediction of knock at full load in a four-cylinder passenger car spark-ignition (SI) engine using computational fluid dynamics (CFD) methodology. The emphasis is on the possibility of controlling the knock limit via optimised engine cooling mechanisms. To date, CFD simulations of the combustion chamber and cooling circuit are performed separately, while chamber wall temperatures are derived from either experiments or experience. This, however, entails the risk of employing inadequate boundary and hence in-cylinder conditions for a combustion and knock simulation.
CFD simulations are performed for all four combustion chambers and metal components, including the cooling circuit. Both types of simulations are thermally coupled via the conditions on the chamber walls. Several engine cycles are simulated with the knock model switched off to converge in terms of wall temperatures and in-cylinder conditions, therefore allowing for more appropriate conditions in the combustion chambers. Thereafter one engine cycle is calculated including the knock model.
A sensitivity study for wall temperatures on knock was performed. The CFD results were compared against local wall temperature measurements on the cylinder head and engine block. The predictions reveal a highly non-uniform temperature distribution on the chamber walls. It is also demonstrated that knock is influenced primarily by the wall temperatures via the resulting thermodynamic state of the in-cylinder mixture due to wall heat transfer rather than via local wall temperature effects.
CitationKleemann, A., Menegazzi, P., Henriot, S., and Marchal, A., "Numerical Study on Knock for an SI Engine by Thermally Coupling Combustion Chamber and Cooling Circuit Simulations," SAE Technical Paper 2003-01-0563, 2003, https://doi.org/10.4271/2003-01-0563.
Computer Aided Engineering of Vehicle & Engine Systems & Components
Number: SP-1740; Published: 2003-03-03
Number: SP-1740; Published: 2003-03-03
- Stone R. Introduction to Internal Combustion Engines Macmillan Press Ltd 3rd London 1999
- Heywood J.B. Internal Combustion Engine Automotive Technology Series McGraw-Hill Book Company New York 1988
- König G. Sheppard C.G.W End Gas Autoignition and Knock in a Spark Ignition Engine SAE Technical Paper Series, No. 902135 1990
- Syrimis M. Shigahara K. Assanis D. Correlation Between Knock Intensity and Heat Transfer Under Light and Heavy Knocking Conditions in a Spark Ignition Engine SAE Technical Paper Series, No. 960495 1996
- Nates R.J. Thermal stresses induced by knocking combustion in spark-ignition engines SAE Technical Paper Series, No. 2000-01-1238 2000
- Westin F. Grandin B. Ångström H.-E The Influence of Residual Gases on Knock in Turbocharged SIEngines SAE Technical Paper Series, No. 2000-01-2840 2000
- Russ S. A Review of the Effect of Engine Operating Conditions on Borderline Knock SAE Technical Paper Series, No. 960497 1996
- Towers J.M. Hoekstra R.L. Engine knock, a renewed concern in motorsports - A literature review SAE Technical Paper Series, No. 983026 1998
- Grandin B. Ångström H.-E. Stålhammar P. Olofsson E. Knock Suppression in a turbucharged SI Engine by Using Cooled EGR SAE Technical Paper Series, No. 982476 1998
- Grandin B. Ångström H.-E Replacing Fuel Enrichment in a Turbocharged SI Engine; Lean Burn or Cooled EGR SAE Technical Paper Series, No. 1999-01-3505 1999
- Habchi C. Torres A. A 3D multi-block structured version of the KIVA-2 code Proceedings of the First European CFD conference 1 502 512 1992
- Amsden A.A. O'Rourke P.J. Butler T.D. KIVA II: A Computer Program for Chemically Reactive Flows with Sprays Technical report No LA-11560-MS Los Alamos National Laboratory May 1989
- Versteeg H.K. Malalasekera W. An Introduction to Computational Fluid Dynamics - The Finite Volume Method Longman Scientific & Technical Essex 1995
- Angelberger C. Poinsot T. Delhaye B. Improving Near-Wall Combustion and Wall Heat Transfer Modeling in SI Engine Computations SAE Technical Paper Series, No. 972881 1997
- Duclos J.M. Zolver M. 3D Modeling of Intake, Injection and Combustion in a DISI Engine under Homogeneous and Stratified Operating Conditions The Fourth International Symposium on Diagnostics and Modeling of Combustion in Internal Combustion Engines, COMODIA 98 Kyoto, Japan Engine Systems Division, The Japan Society of Mechanical Engineers 335 340 20-23 July 1998
- Duclos J.-M. Zolver M. Baritaud T. 3D Modeling of Combustion for DI-SI Engines Oil & Gas Science and Technology - Revue de l'IFP 54 2 259 264 1999
- Douaud A.M. Eyzat P. Four-Octane-Number Method for Predicting the Anti-Knock Behavior of Fuels and Engines SAE Technical Paper Series, No. 780080 78 1978
- Guibet J.C. Faure-Birchem E. Fuels and Engines: Technology, Energy and Environment 1 1996
- Lafossas F.-A. Castagne M. Dumas J.P. Henriot S. Development and Validation of a Knock Model in Spark Ignition Engines Using a CFD Code SAE Technical Paper Series, No. 2002-01-2701 2002
- FLUENT 5 User's Guide Fluent Inc. Lebanon, USA July 1998
- Makkapati S. Poe S. Shaikh Z. Cross R. Mikulec T. Coolant Velocity Correlations in an IC Engine Coolant Jacket SAE Technical Paper Series, No. 2002-01-0238 2002
- Yakhot V. Orszag S.A. Renormalization group analysis of turbulence. I. Basic theory Journal of Scientific Computing 1 1 51 1986
- Launder B.E. Spalding D.B. The Numerical Computation of Turbulent Flows Computer Methods in Applied Mechanics and Engineering 3 269 289 1974