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Low computational cost CFD analysis of thermoacoustic oscillations
Department of Mechanical Engineering, University of Padova.
Department of Mechanical Engineering, University of Padova.
2010 (English)In: Applied Thermal Engineering, ISSN 1359-4311, E-ISSN 1873-5606, Vol. 30, no 6-7, p. 544-552Article in journal (Refereed) Published
Abstract [en]

The numerical analysis of thermoacoustic oscillation phenomena by means of time-dependent CFD simulations usually requires a great computational effort, which may not be reasonable in industrial design. On the other hand, CFD tools provide the only approach that includes all the physical and chemical aspects involved in the thermoacoustic coupling between flame heat release and the acoustic modes of the burner/combustion chamber system. This paper presents some guidelines to reduce the computational effort required to perform a CFD analysis of the thermoacoustic oscillations with commercial codes. These guidelines are organized in a procedure that can be followed to analyze thermoacoustic coupling conditions that actually lead to unstable oscillations or are identified as potentially critical in the design phase. This procedure is also illustrated by an example of application, the partially-premixed flame type burner of a real 10 MW industrial boiler which shows noisy pressure fluctuations at a low frequency

Place, publisher, year, edition, pages
2010. Vol. 30, no 6-7, p. 544-552
Identifiers
URN: urn:nbn:se:ltu:diva-6675DOI: 10.1016/j.applthermaleng.2009.10.017Local ID: 4ef7848c-9796-47f7-8147-96351d8fbbf6OAI: oai:DiVA.org:ltu-6675DiVA, id: diva2:979561
Note
Upprättat; 2012; 20120411 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Toffolo, Andrea

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