This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Hybrid Linear/Nonlinear Method for Exhaust Noise Prediction
Annotation ability available
Sector:
Language:
English
Abstract
The use of computer calculation tools in order to reduce the cost of the development of optimized exhaust systems has turned out to be a generalized industrial practice. Therefore, considerable efforts are devoted to the development of suitable calculation tools, which are representative of the real phenomena taking place in the exhaust systems. In the present paper, the results of the application of a hybrid linear/nonlinear calculation method to the prediction of the exhaust noise radiated by I.C. engines are presented. First, a brief description of the method is given. Then, comparison is shown between the results of the calculation and experimental measurements, both for in-duct pressure and for noise radiated. The agreement obtained indicates that this method may be used as a design tool in the frame of the new methodologies presently arising in exhaust system development.
Recommended Content
Authors
Citation
Desantes, J., Torregrosa, A., and Broatch, A., "Hybrid Linear/Nonlinear Method for Exhaust Noise Prediction," SAE Technical Paper 950545, 1995, https://doi.org/10.4271/950545.Also In
Applications and Developments in New Engine Design and Components
Number: SP-1071; Published: 1995-02-01
Number: SP-1071; Published: 1995-02-01
References
- Landau L.D. Lifshitz E.M. Fluid Mechanics Pergamon Press Oxford 1959
- Jones, A.D. “Modelling the exhaust noise radiated from reciprocating internal combustion engines -A literature review” Noise Control Engineering Journal 23 1 12 31 1984
- El-Sharkawy, A.I. El-Chazly N.M. “A critical survey of basic theories used in muffler design and analysis” Applied Acoustics 20 196 218 1987
- Bodén, H. “The multiple load method for measuring the source characteristics of time-variant sources” Journal of Sound and Vibration 148 3 437 453 1991
- Benson, R.S. The thermodynamics and gas dynamics of internal combustion engines Clarendon Press Oxford 1982
- Blair, G.P. Coates S.W. “Noise produced by unsteady exhaust efflux from an internal combustion engine” SAE Paper 730160 1973
- Coates, S.W. Blair G.P. “Further studies of noise characteristics of internal combustion engine exhaust systems” SAE Paper 740713 1974
- Jones, A.D. Brown G.L. “Determination of two-stroke engine exhaust noise by the method of characteristics” Journal of Sound and Vibration 82 3 305 327 1982
- Ferrari, G. Castelli R. “Computer predictions and experimental tests of exhaust noise in a single cylinder internal combustion engine” Noise Control Engineering Journal 24 2 50 56 1985
- Mayer, K.P. Nowotny B. MTZ Motortechnische Zeitschrift 42 10 391 396 1981
- Sapsford, S.M. Richards V.C.M. Amlee D.R Morel T. Chappell M.T. “Exhaust system evaluation and design by non-linear modeling” SAE Paper 920686 1992
- Munjal, M.L. Acoustics of ducts and mufflers John Willey & Sons New York 1987
- Morel, T. Morel J. Blaser D.A. “Fluid dynamic and acoustic modeling of concentric-tube resonators/silencers” SAE Paper 910072 1991
- Jones, A.D. Van Moorhem, W.K. Voland R.T. “Is a full nonlinear method necessary for the prediction of radiated engine exhaust noise?” Noise Control Engineering Journal 26 2 74 80 1986
- Karnopp, D.C. Dwyer H.A. Margolis D.L. “Computer prediction of power and noise for two-stroke engines with power tuned, silenced exhausts” SAE Paper 750708 1975
- Singh, R. Soedel W. “Mathematical modelling of multicylinder compressor discharge system interactions” Journal of Sound and Vibration 63 1 125 143 1979
- Lehringer, F. VDI Berichte 815 389 398 1990
- Torregrosa, A.J. Método de cálculo para la predicción del ruido aerodinámico de admisión y escape en motores alternativos PhD Thesis Universidad Politécnica de Valencia 1993
- Payri, F, Desantes J.M. Torregrosa A.J. “Acoustic boundary condition for unsteady one-dimensional flow calculations” Submitted to Journal of Sound and Vibration
- Singh, R. Katra T. “Development of an impulse technique for measurement of muffler characteristics” Journal of Sound and Vibration 56 2 279 298 1978
- Benajes, J.V. Torregrosa A.J. Brunel J.P. “The effect of simple muffler geometries on the performance of a single-cylinder engine” Proceedings of the International SIA Congress “The Powertrain” Valencia, Spain 1992
- Payri, F. Benajes J. Chust M.D. 162 17 23 1991
- Payri, F. Boada F. Corberán J.M. “Modifications to the method of characteristics for the analysis of the gas exchange process in internal combustion engines” Proceedings of the Institution of Mechanical Engineers 200 D4 259 266 1986
- Benajes, J.V. Torregrosa A.J. Reyes M.A. “Heat transfer model for I. C. engine exhaust manifolds” Proceedings of the EUROTHERM Seminar 15 189 194 Toulouse, France 1991