Vibration prediction in combustion chambers by coupling finite elements and large eddy simulations

R.A. Huls, A.X. Sengissen, Peter van der Hoogt, Jacobus B.W. Kok, T. Poinsot, Andries de Boer

Research output: Contribution to journalArticleAcademic

19 Citations (Scopus)

Abstract

To decrease NOx emissions from combustion systems, lean premixed combustion is used. A disadvantage is the higher sensitivity to combustion instabilities, leading to increased sound pressure levels in the combustor and resulting in an increased excitation of the surrounding structure: the liner. This causes fatigue, which limits the life time of the combustor. This paper presents a method to calculate these liner vibrations. The time-dependent pressures on the liner are calculated using large eddy simulation (LES) for both steady combustion and combustion with a pulsated fuel flow. These pressures are interpolated on a finite element grid and used in a transient analysis with a finite element model of the liner structure. The calculated vibrations agree well with experiments made on a 500kW test rig.
Original languageUndefined
Pages (from-to)224-229
JournalJournal of sound and vibration
Volume304
Issue number1-2
DOIs
Publication statusPublished - 2007

Keywords

  • IR-58783

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