Courtine, Emilien and Selle, Laurent and Nicoud, Franck and Polifke, Wolfgang and Silva, Camilo and Bauerheim, Michaël and Poinsot, Thierry
Causality and intrinsic thermoacoustic instability modes.
(2014)
In: CTR - Summer Program, 6 July 2014 - 1 August 2014 (Stanford, United States).
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(Document in English)
PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader 884kB |
Official URL: https://web.stanford.edu/group/ctr/Summer/SP14/06_Combustion/07_courtine.pdf
Abstract
Direct numerical simulation of a confined laminar premixed flame has been performed in an anechoic combustor, showing self-sustained intrinsic thermoacoustic oscillations. Theoretical predictions based on acoustic jump relations and the n − τ model for the flame are presented and causality concerns are discussed. The instability’s frequency and mode structure are recovered numerically with very good accuracy. A detailed discussion on the interplay of the physical phenomena responsible for this dynamical coupling is also carried out.
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