Numerical study of thermo-acoustic waves generation by a swirling flame using a new approach based on large eddy simulation

Christophe Duwig, Bogdan, George Gherman, Mihai Mihaescu, Mirko Salewski, Laszlo Fuchs

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

4 Citations (SciVal)

Abstract

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. Copyright
Original languageEnglish
Title of host publicationProceedings of the ASME Turbo Expo
PublisherAmerican Society Of Mechanical Engineers (ASME)
Pages67-75
Volume2
Publication statusPublished - 2005
EventASME Turbo Expo 2005 - Gas Turbie Technology: Focus for the Future - Reno-Tahoe, NV, United States
Duration: 2005 Jun 62005 Jun 9

Publication series

Name
Volume2

Conference

ConferenceASME Turbo Expo 2005 - Gas Turbie Technology: Focus for the Future
Country/TerritoryUnited States
CityReno-Tahoe, NV
Period2005/06/062005/06/09

Subject classification (UKÄ)

  • Fluid Mechanics and Acoustics

Keywords

  • Electricity demand growth
  • Mach number
  • Thermo-acoustic waves

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