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Intrinsic instability of flame-acoustic coupling
KTH, Skolan för teknikvetenskap (SCI), Farkost och flyg, MWL Marcus Wallenberg Laboratoriet. Eindhoven University of Technology, Netherlands.ORCID-id: 0000-0002-3609-3005
Vise andre og tillknytning
2014 (engelsk)Inngår i: Combustion and Flame, ISSN 0010-2180, E-ISSN 1556-2921, Vol. 161, nr 11, s. 2860-2867Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This paper shows that a flame can be an intrinsically unstable acoustic element. The finding is clarified in the framework of an acoustic network model, where the flame is described by an acoustic scattering matrix. The instability of the flame acoustic coupling is shown to become dominating in the limit of no acoustic reflections. This is in contrast to classical standing-wave thermoacoustic modes, which originate from the positive feedback loop between system acoustics and the flame. These findings imply that the effectiveness of passive thermoacoustic damping devices is limited by the intrinsic stability properties of the flame.

sted, utgiver, år, opplag, sider
2014. Vol. 161, nr 11, s. 2860-2867
Emneord [en]
Thermoacoustics, Intrinsic flame instability, Flame instability, Acoustics, Combustion instabilities
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-156105DOI: 10.1016/j.combustflame.2014.05.009ISI: 000343380000010Scopus ID: 2-s2.0-84926277042OAI: oai:DiVA.org:kth-156105DiVA, id: diva2:778127
Merknad

QC 20150109

Tilgjengelig fra: 2015-01-09 Laget: 2014-11-21 Sist oppdatert: 2017-12-05bibliografisk kontrollert

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