Three-step approach for prediction of limit cycle pressure oscillations in combustion chambers of gas turbines
| Autor: | Dmytro Iurashev, Vyacheslav V. Anisimov, Ezio Cosatto, Giovanni Campa |
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| Rok vydání: | 2017 |
| Předmět: |
Work (thermodynamics)
Chemistry 020209 energy General Chemical Engineering Describing function General Physics and Astronomy Energy Engineering and Power Technology 02 engineering and technology General Chemistry Mechanics Flame speed Combustion 01 natural sciences 010305 fluids & plasmas Fuel Technology Closure (computer programming) Modeling and Simulation Limit cycle 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Combustor Combustion chamber |
| Zdroj: | Combustion Theory and Modelling. 21:1148-1175 |
| ISSN: | 1741-3559 1364-7830 |
| Popis: | Currently, gas turbine manufacturers frequently face the problem of strong acoustic combustion driven oscillations inside combustion chambers. These combustion instabilities can cause extensive wear and sometimes even catastrophic damages to combustion hardware. This requires prevention of combustion instabilities, which, in turn, requires reliable and fast predictive tools. This work presents a three-step method to find stability margins within which gas turbines can be operated without going into self-excited pressure oscillations. As a first step, a set of unsteady Reynolds-averaged Navier–Stokes simulations with the Flame Speed Closure (FSC) model implemented in the OpenFOAM® environment are performed to obtain the flame describing function of the combustor set-up. The standard FSC model is extended in this work to take into account the combined effect of strain and heat losses on the flame. As a second step, a linear three-time-lag-distributed model for a perfectly premixed swirl-stabilized flame is ... |
| Databáze: | OpenAIRE |
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