In the scope of this work, thermoacoustic flame transfer functions have been measured at elevated combustor pressure for two different burners representing lean premixed gas turbine combustion technology. Scaling laws have been found to characterise the transfer function behaviour over pressure and air excess ratio. Moreover, an approach to derive detailed models of the measured transfer functions is presented. Finally, a procedure has been developed that allows the separation of the influences of velocity perturbations and air excess ratio fluctuations on the flame transfer function.
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In the scope of this work, thermoacoustic flame transfer functions have been measured at elevated combustor pressure for two different burners representing lean premixed gas turbine combustion technology. Scaling laws have been found to characterise the transfer function behaviour over pressure and air excess ratio. Moreover, an approach to derive detailed models of the measured transfer functions is presented. Finally, a procedure has been developed that allows the separation of the influences...
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