Analysis and Control of an Unstable Mode in a Combustor with Tuneable End Condition
A major problem in the development of low-pollution combustion systems are thermo-acoustic instabilities, i.e. large-amplitude oscillations generated by a feedback between the unsteady heat release and acoustic waves. In order to develop robust control strategies, it is necessary to have a predictiv...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2013-09-01
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| Series: | International Journal of Spray and Combustion Dynamics |
| Online Access: | https://doi.org/10.1260/1756-8277.5.3.243 |
| Summary: | A major problem in the development of low-pollution combustion systems are thermo-acoustic instabilities, i.e. large-amplitude oscillations generated by a feedback between the unsteady heat release and acoustic waves. In order to develop robust control strategies, it is necessary to have a predictive model that captures the physics of the phenomenon. The aim of this paper is to present such a model for a dump combustor with a generic heat release law, and fitted at the inlet end with a perforated plate backed by a tuneable cavity. Our model leads to a simple governing equation for one acoustic mode in the combustor, and from this equation stability predictions can be made with a minimum of numerical effort. We will use it to examine the effect of various system parameters. |
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| ISSN: | 1756-8277 1756-8285 |