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Numerical Study of Thermo-acoustic Waves Generation by a Swirling Flame Using a New Approach Based on large eddy simulation
Energy Sciences, Lund University.ORCID iD: 0000-0001-5886-415X
Energy Sciences, Lund University.
Energy Sciences, Lund University.ORCID iD: 0000-0001-7330-6965
Energy Sciences, Lund University.
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2005 (English)In: Volume 2: Turbo Expo 2005: Power for Land, Sea, and Air (GT2005), 2005, 67-75 p.Conference paper (Refereed)
Abstract [en]

The new challenge of the Gas Turbine industry is to develop new technologies for meeting electricity demand growth and reducing harmful emissions. Thus, a better understanding of the combustion phenomenon and an improvement in simulation capabilities are needed. In this paper, we present a new technique that is computationally efficient, for capturing the thermo-acoustic waves in low Mach number combustors. The idea is to utilize the fact that the acoustic related pressure fluctuations are small as compared to the dynamic pressure. Semi-compressible LES of reacting flow is performed and while the pressure perturbations related to the acoustic-wave propagation are handled separately. The equations are solved individually while allowing interaction between the two systems. The technique has been applied to the study of the generation and propagation of thermo-acoustic waves in a combustion chamber. A sensitivity analysis is presented and most important instability modes are identified.

Place, publisher, year, edition, pages
2005. 67-75 p.
National Category
Energy Engineering Fluid Mechanics and Acoustics
URN: urn:nbn:se:kth:diva-48485DOI: 10.1115/GT2005-68136ISBN: 0-7918-4725-XOAI: diva2:457742
ASME Turbo Expo 2005: Power for Land, Sea, and Air (GT2005) June 6–9, 2005 , Reno, Nevada, USA
QC 20111122Available from: 2011-11-18 Created: 2011-11-18 Last updated: 2011-11-23Bibliographically approved

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Duwig, ChristopheMihaescu, Mihai
Energy EngineeringFluid Mechanics and Acoustics

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