A-8 燃焼振動の低減法に関する研究 : 高圧下での共鳴器による燃焼振動低減(燃焼・燃焼器II,一般講演)

概要

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Recent regulation on NOx emission is promoting the use of lean premix combustion for the high temperature gas turbines. But, premix operational experience has been accompanied by combustion oscillation. We already applied the Helmholtz resonator for reducing the combustion oscillation in the combustion chamber at the atmospheric pressure. Then, we showed that resonator could reduce amplitudes of the combustion oscillations by optimizing the resonator size. From these results, the controlling system, which automatically controls the resonator volume to minimize the oscillations amplitude based on the dynamic pressure signals in the combustion chamber, was applied to the combustor. The controlling system could achieve large reduction of the combustion oscillation in wide range of operating conditions. To apply the resonator to the gas turbine combustor, we evaluated the effects of the operating pressures for the resonator method. We found that the resonator could reduce the combustion oscillations under high pressures.
社団法人日本ガスタービン学会の論文
2004-10-01