P11-09 共鳴器によるガスタービン燃焼器内燃焼振動の低減

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Lean premixed combustion can reduce NOx emissions from gas turbines, but often leads to combustion oscillations. This paper describes the characteristics of combustion oscillations in premix combustion flame. The flame is stabilized by swirler in the straight tube which simulates gas turbine combustor configuration. Combustion tests were performed in the atmospheric pressure with natural gas fuel. The effects of reference velocity, equivalence ratio and premix ratio were investigated. High speed video camera and photodiode were applied to visualize flame behaviors. The characteristics of combustion pressure oscillations and flame behaviors which have periodic motions in the combustion zone were presented. The resonators with controlling system were applied for reducing combustion oscillations in combustion chamber. The results showed that the control system achieved large reduction of the oscillations amplitude.
2002-06-14