Please use this identifier to cite or link to this item:
https://doi.org/10.21256/zhaw-23280| Publication type: | Conference paper |
| Type of review: | Peer review (publication) |
| Title: | Autoignition flame transfer matrix : analytical model versus large eddy simulations |
| Authors: | Gant, Francesco Cuquel, Alexis Bothien, Mirko |
| et. al: | No |
| DOI: | 10.21256/zhaw-23280 |
| Conference details: | Symposium on Thermoacoustics in Combustion: Industry meets Academia (SoTiC 2021), 6-10 September 2021 |
| Issue Date: | Sep-2021 |
| Publisher / Ed. Institution: | ZHAW Zürcher Hochschule für Angewandte Wissenschaften |
| Language: | English |
| Subjects: | Autoignition; Flame transfer matrix; Sequential combustion; Gas turbines; Rankine-Hugoniot conditions |
| Subject (DDC): | 629: Aeronautical, automotive engineering |
| Abstract: | Modern gas turbines need to fulfill increasingly stringent emission targets on the one hand and exhibit outstanding operational and fuel flexibility on the other. Ansaldo Energia GT26 and GT36 gas turbine models address these requirements by employing a combustion system in which two lean premixed combustors are arranged in series. Due to the high inlet temperatures from the first stage, the second combustor stage predominantly relies on autoignition for flame stabilization. In this paper, the response of autoignition flames to temperature, pressure and velocity excitations is investigated. The gas turbine combustor geometry is represented by a backward-facing step. Based on the conservation equations an analytical model is derived by solving the linearized Rankine-Hugoniot conditions. This is a commonly used analytical approach to describe the relation of thermodynamic quantities up- and downstream of a propagation stabilized flame. In particular, the linearized Rankine-Hugoniot jump conditions are derived taking into account the presence of a moving discontinuity as well as upstream entropy inhomogeneities. The unsteady heat release rate of the flame is modeled as a linear superposition of flame transfer functions, accounting for velocity, pressure, and entropy disturbances, respectively. This results in a 3x3 flame transfer matrix relating both primitive acoustic variables and the temperature fluctuations across the flame. The obtained analytical expression is compared to large eddy simulations with excellent agreement. A discussion about the contribution of the single terms to the modeling effort is provided, with a focus on autoignition flames. |
| Further description: | Paper number 8436 |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/23280 |
| Fulltext version: | Published version |
| License (according to publishing contract): | Licence according to publishing contract |
| Departement: | School of Engineering |
| Organisational Unit: | Institute of Energy Systems and Fluid Engineering (IEFE) |
| Appears in collections: | Publikationen School of Engineering |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2021_Gant_Autoignition_flame_transfer_matrix.pdf | 831.37 kB | Adobe PDF |  View/Open |
Show full item record
Gant, F., Cuquel, A., & Bothien, M. (2021, September). Autoignition flame transfer matrix : analytical model versus large eddy simulations. Symposium on Thermoacoustics in Combustion: Industry Meets Academia (SoTiC 2021), 6-10 September 2021. https://doi.org/10.21256/zhaw-23280
Gant, F., Cuquel, A. and Bothien, M. (2021) ‘Autoignition flame transfer matrix : analytical model versus large eddy simulations’, in Symposium on Thermoacoustics in Combustion: Industry meets Academia (SoTiC 2021), 6-10 September 2021. ZHAW Zürcher Hochschule für Angewandte Wissenschaften. Available at: https://doi.org/10.21256/zhaw-23280.
F. Gant, A. Cuquel, and M. Bothien, “Autoignition flame transfer matrix : analytical model versus large eddy simulations,” in Symposium on Thermoacoustics in Combustion: Industry meets Academia (SoTiC 2021), 6-10 September 2021, Sep. 2021. doi: 10.21256/zhaw-23280.
GANT, Francesco, Alexis CUQUEL und Mirko BOTHIEN, 2021. Autoignition flame transfer matrix : analytical model versus large eddy simulations. In: Symposium on Thermoacoustics in Combustion: Industry meets Academia (SoTiC 2021), 6-10 September 2021. Conference paper. ZHAW Zürcher Hochschule für Angewandte Wissenschaften. September 2021
Gant, Francesco, Alexis Cuquel, and Mirko Bothien. 2021. “Autoignition Flame Transfer Matrix : Analytical Model versus Large Eddy Simulations.” Conference paper. In Symposium on Thermoacoustics in Combustion: Industry Meets Academia (SoTiC 2021), 6-10 September 2021. ZHAW Zürcher Hochschule für Angewandte Wissenschaften. https://doi.org/10.21256/zhaw-23280.
Gant, Francesco, et al. “Autoignition Flame Transfer Matrix : Analytical Model versus Large Eddy Simulations.” Symposium on Thermoacoustics in Combustion: Industry Meets Academia (SoTiC 2021), 6-10 September 2021, ZHAW Zürcher Hochschule für Angewandte Wissenschaften, 2021, https://doi.org/10.21256/zhaw-23280.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.