Abstract
Active combustion instability control through modulated liquid fuel injection is investigated. The flame response to external excitation is determined by phase-locked radical emission imaging. A fuel oil spray flame is destabilized by a controlled external acoustic excitation. The actuator is used to modulate the liquid fuel spray, imposing a phase shift between the pressure and heat release fluctuations. This system can efficiently control the level of heat release oscillations in the combustion zone and the corresponding pressure fluctuations.
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