An existing design tool for the prediction of self-sustained combustion oscillations has been extended for being able to make quantitative statements about the thermo-acoustic stability of combustion systems therewith in the future. It has particularly been possible to depict the energy budget of the oscillations more realistically, due to the implementation of acoustic losses. Therefore a new approach has been developed, which allows recording local acoustic losses within the system approximately, despite the use of the per se isentropic wave equation. For the consideration of complex losses at the borders, a transfer of different frequency dependent boundary conditions into the calculations in the time domain has been realised. Using this extended modelling package, stability simulations have been performed by means of a burner configuration.
«An existing design tool for the prediction of self-sustained combustion oscillations has been extended for being able to make quantitative statements about the thermo-acoustic stability of combustion systems therewith in the future. It has particularly been possible to depict the energy budget of the oscillations more realistically, due to the implementation of acoustic losses. Therefore a new approach has been developed, which allows recording local acoustic losses within the system approximate...
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