燃焼振動の低減法に関する研究 : 共鳴器による燃焼振動制御

概要

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Recent regulation on NOx emissions are 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. It is found that the combustion oscillation is reduced by optimizing the size of resonator parameters. Therefore, the controlling system, which automatically controls the resonator volume to minimize the oscillations amplitude based on the dynamic pressure signals in the combustion chamber, is applied to the combustor. The test results show that the controlling system can achieve large reduction of the oscillation amplitude in the wide operating conditions.
2005-03-20