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

R.A. Huls*, A.X. Sengissen, P.J.M. van der Hoogt, Ja.B.W. Kok, T. Poinsot, A. de Boer

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

22 Citations (Scopus)
24 Downloads (Pure)

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 languageEnglish
Pages (from-to)224-229
JournalJournal of sound and vibration
Volume304
Issue number1-2
DOIs
Publication statusPublished - 2007

Keywords

  • 2023 OA procedure

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