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- W287855250 abstract "The onset of thermoacoustic instabilities in lean-premixed gas-turbine combustors is a crucial problem leading to degradation in engine and emissions performance and shortened component life. The main aim of this study is to propose a methodology based both on concepts of nonlinear dynamics and on geometric-topological invariants, for the characterization of attractors related to measurements based on the flame spontaneous light emission, like OH* radical, in order to classify different phases of the combustion process and to better recognize the transition mechanisms leading to the thermoacoustic instabilities. Preliminary results, clearly show the powerfulness of the approach to show the dynamical evolution of the flame and to evidence the onset of the thermoacoustic instabilities: in particular the topological invariant index (genus and related quantities) appear s as the best candidate for an early indicator of the dynamical transition, characterized by the onset of a more persistent, low entropy torus (quasi-periodic motion), as the related thermoacoustic attractor." @default.
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- W287855250 date "2003-06-30" @default.
- W287855250 modified "2023-09-27" @default.
- W287855250 title "Characterization and diagnostics of combustion thermoacoustic instabilities using nonlinear dynamics and topological methods" @default.
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