The use of lean, premixed combustion in gas turbines is now widespread due to their low NOx emissions. Such systems are, however, susceptible to a phenomenon called thermoacoustic instability, which occurs as a result of unstable coupling between the combustion chamber acoustics and the flame. It can lead to large amplitude pressure oscillations within a combustor at frequencies in the hundreds of hertz. These pressure oscillations can result in unacceptably large noise levels, flame blow-out, reduced performance and fatigue failure of the combustor walls. This thesis investigates two problems of particular relevance to thermoacoustic instability. (For complete abstract open document)
| Identifer | oai:union.ndltd.org:ADTP/245714 |
| Date | January 2009 |
| Creators | Moase, William H. |
| Source Sets | Australiasian Digital Theses Program |
| Language | English |
| Detected Language | English |
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