Flow induced pulsations in pipe systems with closed pipe segments
M.Sc. D.Tonon, prof.dr.ir. A.Hirschberg, Ing. J.F.H. Willems,
Air and fuel transport systems usually comprise many closed branches, which are known to give rise to aero-acoustical instabilities. Steady pulsation amplitudes are reached as a result of non-linear saturation.
A study of the aeroacoustics of complex pipe systems has been initiated considering as a prototype a row of closed side branches placed along a main pipe [1,2,4,5,6,7]. For shallow closed side branches a behavior similar to that of so-called corrugated pipes has been observed. We are currently considering the case of multiple deep closed branches . The main goal of our research is the development of simplified non-linear models describing the coupling of vortex shedding with acoustical resonance. This work is sponsored by the European Commission Marie Curie RTN Project AETHER (http://aether.cerfacs.fr/), Contract no. MRTN-CT-2006- 035713.
Suction and discharge sides of the compressor section of the Ommen compressor station (N.V. Nederlandse Gasunie) and flow visualization of the vortex shedding at a side branch opening.
 D. Tonon, B.J.T. Landry, S.P.C. Belfroid, J.F.H. Willems, G.C.J. Hofmans and A. Hirschberg, Whistling of a pipe system with multiple side branches: comparison with corrugated pipes, Journal of Soundand Vibration, 329, 1007-1024, 2010.
 G. Nakiboglu, S.P.C. Belfroid, D. Tonon, J.F.H. Willems and A. Hirschberg, A parametric study on the whistling of multiple side branch system as a model for corrugated pipes, PVP2009-77754, 2009 ASME Pressure Vessels and Piping Division Conference, Prague, Czech Republic, 2009.
 D. Tonon, G. Nakiboglu, J.F.H. Willems, A. Hirschberg, R.E. Leandro, W. Polifke and H.J. Riezebos, Self-sustained aeroacoustic oscillations in multiple side branch pipe systems, AIAA-2009-3262, 15th AIAA/CEAS Aeroacoustic Conference, Miami, Florida, United States, 2009.
 D. Tonon, G. Nakiboglu, S.P.C. Belfroid, J.F.H. Willems, A. Hirschberg, Whistling of corrugated pipes, MS-18 ID-920, 7th EUROMECH Solid Mechanics Conference, Lisbon, Portugal, 2009.
 D. Tonon, S. Belfroid, J.F.H. Willems and A. Hirschberg, Multiple side branches as a model for corrugated pipes (poster), JMBC Burgersdag 2008, Delft University of Technology, Delft, The Netherlands, 2008.
 D. Tonon, S. Belfroid, J.F.H. Willems and A. Hirschberg, Multiple side branches as a model for corrugated pipes (poster), Acoustics '08 Paris, Paris, 2008.
 Multiple side-branch system as a model for corrugated pipes, JMBC Burgersdag 2009, Eindhoven University of Technology, Eindhoven, The Netherlands, 2009.
 D. Tonon, S. Belfroid, J.F.H. Willems and A. Hirschberg, Multiple side-branch system as a model for corrugated pipes, NAG/DAGA 2009, Rotterdam, The Netherlands, 2009.
Arcelor Steel Belgium N.V., Alstom (Switzerland) Ltd., CERFACS, Gasunie Engineering & Technology, Instituto Superior Técnico Lisbon, Katholieke Universiteit Leuven, LMS International, Luleå University of Technology, Rolls-Royce plc., TNO Science & Industry, Technische Universität München, University of Cambridge, von Karman Institute for Fluid Dynamics.