Flow Induced Pulsations in Gas Transport Systems: Analysis of the Influence of Closed Side Branches

[+] Author and Article Information
J. C. Bruggeman, A. Hirschberg, M. E. H. van Dongen, A. P. J. Wijnands

Department of Physics, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands

J. Gorter

Research Laboratory of N.V. Nederlandse Gasunie, 9700 MA Groningen, The Netherlands

J. Fluids Eng 111(4), 484-491 (Dec 01, 1989) (8 pages) doi:10.1115/1.3243672 History: Received January 15, 1987; Revised September 20, 1988; Online October 26, 2009


A theoretical analysis is presented of the low frequency aero-acoustic behavior of closed side branches along a gas transport pipe. The theory predicts the hydrodynamic conditions for moderate and strong pulsations. A model is proposed which predicts the order of magnitude of the power generated by the aero-acoustic source. The theoretical analysis leads to the design of spoilers which reduce the pulsation level by 30 to 40 dB. The results obtained by theoretical analysis and model experiments (Reynolds number 106 ) have been confirmed in full scale tests (Reynolds number 108 ).

Copyright © 1989 by ASME
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