Fluid-structure interaction on the combustion instability

A.C. Altunlu, Mina Shahi, Artur Krzysztof Pozarlik, Peter van der Hoogt, Jacobus B.W. Kok, A de Boer

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

4 Citations (Scopus)
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The multi-domain problem, the limit cycle behaviour of unstable oscillations in the LIMOUSINE model combustor has been investigated by numerical and experimental studies. A strong interaction between the aerodynamics-combustion-acoustic oscillations has been observed during the operation. In this regime, the unsteady heat release by the flame is the acoustic source inducing pressure waves and subsequently the acoustic field acts as a pressure load on the structure. The vibration of the liner walls generates a displacement of the flue gas near the wall inside the combustor which generates an acoustic field proportional to the liner wall acceleration. The two-way interaction between the oscillating pressure load in the fluid and the motion of the structure under the limit cycle oscillation can bring up elevated vibration levels, which accelerates the degradation of liner material at high temperatures. Therefore, fatigue and/or creep lead the failure mechanism. In this paper the time dependent pressures on the liner and corresponding structural velocity amplitudes are calculated by using ANSYS workbench V13.1 software, in which pressure and displacement values have been exchanged between CFD and structural domains transiently creating two-way fluid-structure coupling. The flow of information is sustained between the fluid dynamics and structural dynamics. A validation check has been performed between the numerical pressure and liner velocity results and experimental results. The excitation frequency of the structure in the combustor has been assessed by numerical, analytical and experimental modal analysis in order to distinct the acoustic and structural contribution.
Original languageEnglish
Title of host publicationProceedings of the 19th International Congress on Sound and Vibration
EditorsCiplys Daumantas
Place of PublicationVilnius, Lithuania
PublisherInternational Institute of Acoustics and Vibration (IIAV)
Number of pages9
ISBN (Print)978-609-459-080-1
Publication statusPublished - 8 Jul 2012
Event19th International Congress on Sound and Vibration, ICSV 2012 - Vilnius, Lithuania, Vilnius, Lithuania
Duration: 8 Jul 201212 Jul 2012
Conference number: 19

Publication series

PublisherInternational Institute of Acoustics and Vibration (IIAV)


Conference19th International Congress on Sound and Vibration, ICSV 2012
Abbreviated titleICSV
Internet address


  • METIS-285729
  • IR-80760


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