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Modeling of silencers for internal combustion engines: 1D-3D coupling, network of 1D elements and a generic 3D cell approach
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 13, 2009 by Consiglio Nazionale delle Ricerche in Italy
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Increasing demands on the capabilities of engine simulation and the ability to accurately predict both performance and acoustics has lead to the development of multiple approaches, ranging from fully 3D to simplified 1D models. In this work it will be described the development and application of hybrid 1D-3D approaches and an innovative one based on the 3D cell element. This is designed to model the acoustics of intake and exhaust system components used in internal combustion engines. Models of components are built using a network or grid of 3D cells based primarily on the geometry of the system. This means that these models can be built without fundamental knowledge of acoustically equivalent systems making their range of application larger as well as making them simpler to construct. Due to the 3D nature of these models it is also possible to predict higher order modes and improve the accuracy of models at high frequencies compared to conventional plane wave approaches. The solution of the 3D cell is based on a staggered grid approach. The equations of mass and energy are solved at cell centers and the momentum equation at cell connections or boundaries. The 3D acoustic cell has been validated by comparing the predicted transmission loss to measured values for a number of standard configurations found in intake and exhaust systems. These include expansion and reverse flow chambers. The transmission loss has been measured using the two load technique.
CitationMontenegro, G., Onorati, A., Fairbrother, R., and Liu, S., "Modeling of silencers for internal combustion engines: 1D-3D coupling, network of 1D elements and a generic 3D cell approach," SAE Technical Paper 2009-24-0133, 2009, https://doi.org/10.4271/2009-24-0133.
- Shaw, C. Moenssen, D. Kostun. J. A correlation study of computational techniques to model engine air induction system response including BEM, FEM and 1D methods Proceedings of the SAE Noise and Vibration Conference , 2003-01-1644 2003
- Shaw, C.E. Moenssen, D.J. Montgomery. W.C. On use of BEA with engine simulation as an input to predict air induction inlet noise SAE Int. Congress & Exp , 2005-01-2350 March 3–6 2005
- Winterbone D. E. Pearson. R. J. Theory of engine manifold design Professional Engineering Publishing London 2000
- Onorati, A. Ferrari, G. D'Errico, G. Montenegro. G. The prediction of 1D unsteady flows in the exhaust system of a s.i. engine including chemical reactions in the gas and solid phase SAE Transactions, Journal of Engines , 2002-01-0003 2003
- Onorati, A. Ferrari, G. D'Errico. G. Secondary air injection in the exhaust after-treatment system of s.i. engines: 1D fluid dynamic modeling and experimental investigation SAE Transactions, Journal of Engines , 2003-01-0366 112–3 544 555 2004
- Users Guide
- Toro. E. F. Riemann solvers and numerical methods for fluid dynamics Springer 1997
- Weller, H. G. Tabor G. Jasak, H. Fureby C. A tensorial approach to computational continuum mechanics using object orientated techniques Computers in Physics 620 631 1998
- Hirsch. C. Numerical Computation of internal and External Flows Volume 1: Fundamentals of Numerical Discretization John Wiley & Sons 1992
- Montenegro, G. Onorati, A. Piscaglia, F. D'Errico. G. Integrated 1d-multid fluid dynamic models for the simulation of i.c.e. intake and exhaust systems SAE Int. Congress & Exp , 2007-01-0495 2007
- Onorati, A. Montenegro, G. D'Errico. G. Prediction of the attenuation characteristics of i.c. engine silencers by 1-d and multi-d simulation models SAE Int. Congress & Exp. , 2006-01-1541 2006
- Montenegro G. Onorati. A. Modeling of silencers for i.c. engine intake and exhaust systems by means of an integrated 1d-multid approach Sae linternational Jjournal of Eengines , paper n. 2008-01-0677 466 479 2009
- Chapman, J. M. Novak M. Stein. R. A. Numerical modelling of inlet and exhaust flows in multi-cylinder internal combustion engines Uzkan, Teoman Flows in internal combustion engines Austin, TX 1982
- Versteeg H.K. Malalasekera. W. An introduction to Computational Fluid Dynamics: The Finite Volume Method volume Vol. I Pearson Education Ltd. Harlow, Essex, UK 2007
- Dolinar, A. Fairbrother, R. Priebsch, H. Bodén. H. Experimental investigations on the acoustic properties of some fundamental elements found in automotive exhaust mufflers The 36th International Congress and Exhibition on Noise Control Enineering , in07-145 2007