Identification of the Flame Describing Function of a Premixed Swirl Flame from LES
| Autor: | Jacobus B.W. Kok, C. H. Beck, Werner Krebs, Christian Oliver Paschereit, H. J. Krediet, Sebastian Schimek |
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| Rok vydání: | 2012 |
| Předmět: |
Work (thermodynamics)
Chemistry 020209 energy General Chemical Engineering Describing function General Physics and Astronomy Energy Engineering and Power Technology Context (language use) 02 engineering and technology General Chemistry Mechanics Combustion 01 natural sciences 7. Clean energy 010305 fluids & plasmas Nonlinear system Fuel Technology Limit cycle 0103 physical sciences Limit (music) 0202 electrical engineering electronic engineering information engineering Large eddy simulation |
| Zdroj: | Combustion Science and Technology. 184:888-900 |
| ISSN: | 1563-521X 0010-2202 |
| DOI: | 10.1080/00102202.2012.663981 |
| Popis: | Thermo-acoustic characterization of gas turbine combustion systems is crucial for a successful development of new gas turbine engines to meet emission and efficiency targets. In this context, it becomes more and more necessary to predict the limit cycle amplitudes of thermo-acoustic induced combustion instabilities in order to figure out if they can be tolerated or if they are above the critical design limit and will cause damage to the engine. For the prediction of limit cycle amplitudes, the nonlinear flame response of the combustion system is needed, which is represented in this work by the flame describing function (FDF). In this article, the identification of the FDF from a large eddy simulation (LES) is validated. The test case used was a premixed atmospheric swirl flame, for which experimental data on the FDF were available. First a steady reacting LES solution was obtained and compared to experimental data. The simulation was then excited by superimposing a mono-frequency harmonic wave on the velo... |
| Databáze: | OpenAIRE |
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