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Acoustic scattering behavior of a 2D flame with heat exchanger in cross-flow
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2016 (English)In: ICSV 2016 - 23rd International Congress on Sound and Vibration: From Ancient to Modern Acoustics, International Institute of Acoustics and Vibrations , 2016Conference paper (Refereed)
Abstract [en]

In practical heat production systems, premixed flames with cold heat exchanger in cross-flow is a widely used configuration. Self-excited thermoacoustic instabilities often occur in such systems. A practical way to predict the presence of the instabilities is the network model approach. In the present study, the configuration flame - heat exchanger is analyzed numerically. We first analyze the system as a network of segregated elements. Based on the resulting acoustic scattering matrix, the role of the heat exchanger as an amplifier of the flame resonant frequencies will be discussed. Then, results from the 1D network modeling are compared to results of compressible numerical simulations, performed for several distances between flame and heat exchanger. Finally, the limits to the validity of the segregated network model approach are discussed.

Place, publisher, year, edition, pages
International Institute of Acoustics and Vibrations , 2016.
Keyword [en]
Acoustic field measurement, Heat exchangers, Natural frequencies, Thermoacoustics, Acoustic Scattering, Cross flows, Heat production, Network modeling, Premixed Flame, Segregated network, Self - excited, Thermoacoustic instability, Acoustic wave scattering
National Category
Fluid Mechanics and Acoustics Aerospace Engineering
URN: urn:nbn:se:kth:diva-195558ScopusID: 2-s2.0-84987909227ISBN: 9789609922623OAI: diva2:1046776
23rd International Congress on Sound and Vibration, ICSV 2016, 10 July 2016 through 14 July 2016

Funding Details: FP7-PEOPLE-ITN-2012, EC, European Commission

QC 20161115

Available from: 2016-11-15 Created: 2016-11-03 Last updated: 2016-11-15Bibliographically approved

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Lopez Arteaga, Ines
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