American Journal of Vehicle Design
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American Journal of Vehicle Design. 2015, 3(1), 6-15
DOI: 10.12691/ajvd-3-1-2
Open AccessArticle

Experimental Assessment of Noise Generation from I.C. Engine Intake and Exhaust Systems Components

Sabry Allam1,

1Automotive Technology Department, Faculty of Industrial Education, Helwan University, Cairo, Egypt

Pub. Date: April 20, 2015

Cite this paper:
Sabry Allam. Experimental Assessment of Noise Generation from I.C. Engine Intake and Exhaust Systems Components. American Journal of Vehicle Design. 2015; 3(1):6-15. doi: 10.12691/ajvd-3-1-2


Several acoustic elements are used in internal combustion engine to tune engine intake/exhaust manifold systems. Components in intake and exhaust systems that create flow separation can for certain conditions and frequencies amplify incident sound waves. This vortex-sound phenomena is the origin for whistling, i.e., the production of tonal sound at frequencies close to the resonances of a duct system. One way of predicting whistling potential is to compute the acoustic power balance, i.e., the difference between incident and scattered sound power. This can readily obtained if the scattering matrix is known for the object. For the low frequency plane wave case this implies knowledge of the two-port data, which can be obtained by numerical and experimental methods. In this paper the development of multi-port models to describe linear acoustic problems in ducts with flow is presented. From an engineering point of view this field covers many important applications ranging from ventilation ducts in vehicles or buildings to intake/exhaust ducts on IC engines and power plants.In this paper the procedure to experimentally determine whistling potential will be presented and applied to side-branch resonators and orifices.

experimental method noise generation resonators engine noise power balance system instability whistling

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[1]  Bodén H. and Åbom M., “Modelling of fluid machines as sources of sound in duct and pipe systems”, Acta Acustica (3), 1995, pp. 549-560.
[2]  Sabry Allam and Mats Åbom “Whistling Potential for Duct Components“. SAE Paper 2013-01-1889. May 20-23, 2013, Grand Rapids, Michigan, USA.
[3]  Radavich P., Selamet A. and Novak J. “A computational approach for flow–acoustic coupling in closed side branches”, J. Acoust. Soc. Am. 109 (4), 2001, pp 1343-1353.
[4]  Knutsson, M. and Bodén, H., “IC-Engine Intake Acoustic Source Data from Non-Linear Simulations. SAE Technical Paper 2007-01-2209.
[5]  De Roeck W., Solntseva V. and W. Desmet (2008), “Numerical methodologies to predict the noise generation and propagation mechanisms in multiple expansion chambers”, AIAA (2008)-paper 2949.
[6]  Kierkegaard A., Boij S. and Efraimsson G. “A frequency domain linearized Navier-Stokes equations approach to acoustic propagation in flow ducts with sharp edges”, J. Acoustical Soc. of America (127) 2010, pp 710-719.
[7]  Aurégan Y. and Starobinski R., “Determination of acoustical dissipation/production potentiality from the acoustical transfer function of a multiport”, Acta Acustica, vol. 85, 1999, pp 788-792.
[8]  Åbom M., Allam S. and Boij S., “Aero-acoustics of flow duct singularities at low Mach number flows”, Vol. 1, AIAA, 2006, pp. 2687.
[9]  Testud P., Aurégan Y., Moussou P. and Hirschberg A., “The whistling potentiality of an orifice in a confined flow using an energetic criterion”, Journal of Sound and Vibration (325), 2009, pp 769-780.
[10]  Sattelmayer T. and Polifke W., “Assessment of methods for the computation of the linear stability of combustors”, Combustion Science and Technology (175), 2003, pp 453-476.
[11]  Karlsson M. and Åbom M., “Aeroacoustics of T-junctions an experimental study”, Journal of Sound and Vibration 329 (2010) 1793-1808.
[12]  Kierkegaard A., Allam S., Efraimsson G. and Mats Å. (2012), “Simulations of whistling and the whistling potentiality of an in-duct orifice with linear aeroacoustics” Journal of Sound and Vibration (331) 2012, pp 1084-1096.
[13]  Kong, H., Woods, R., 1992, “Tuning of Intake Manifold of an Internal Combustion Engine Using Fluid Transmission. Line Dynamics”, International Congress & Exposition, SAE, February.
[14]  Åbom M. “Measurement of the Scattering-Matric of Acoustical Two-Ports”. Mechanical Systems and Signal Processing 5(2), 1991, pp 89-104.
[15]  M. Karlsson and M. Åbom, “Aeroacoustics of T-junctions an experimental study”, Journal of Sound and Vibration 329 (2010) 1793-1808.