Abstract
The physical model investigation on the thermoacoustic oscillation in a lean premixed combustor was conducted to develop a closed-loop feedback control system. With respect to the coupling between pressure fluctuation and heat release fluctuation, phenomenologic analysis was used. As a result, we succeeded in explaining the oscillatory combustion mathematically. On the other hand, mixed H^∞/H^2 control algorithm based on the experimental modal analysis for system identification was applied to the closed-loop feedback control system. Consequently, the developed system performed well with the result of 25.2dB reduction.
