Thermo-acoustic cross-talk between cans in a can-annular combustor
| Autor: | Lukasz Panek, Jim B. W. Kok, Federica Farisco |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Gas turbines
reflection coefficient Materials science Thermo-acoustics Acoustics lcsh:Mechanical engineering and machinery lcsh:Motor vehicles. Aeronautics. Astronautics General Physics and Astronomy Energy Engineering and Power Technology combustion instabilities 01 natural sciences 7. Clean energy 010305 fluids & plasmas transmission coefficient 0103 physical sciences Automotive Engineering Combustor lcsh:TJ1-1570 Transmission coefficient cross-talk Reflection coefficient lcsh:TL1-4050 010301 acoustics |
| Zdroj: | International Journal of Spray and Combustion Dynamics, Vol 9 (2017) International journal of spray and combustion dynamics, 9(4), 452-469. Multi-Science Publishing Co. Ltd |
| ISSN: | 1756-8277 |
| Popis: | Thermo-acoustic instabilities in gas turbine engines are studied to avoid engine failure. Compared to the engines with annular combustors, the can-annular combustor design should be less vulnerable to acoustic burner-to-burner interaction, since the burners are acoustically coupled only by the turbine stator stage and the plenum. However, non-negligible cross-talk between neighboring cans has been observed in measurements in such machines. This study is focused on the analysis of the acoustic interaction between the cans. Simplified two-dimensional (2D) and three-dimensional (3D) equivalent systems representing the corresponding engine alike turbine design are investigated. Thermo-acoustic instabilities are reproduced using a forced response approach. Compressible large eddy simulation based on the open source computational fluid dynamics OpenFOAM framework is used applying accurate boundary conditions for the flow and the acoustics. A study of the reflection coefficient and of the transfer function between the cans has been performed. Comparisons between 2D and 3D equivalent configurations have been evaluated. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|