燃焼振動の低減法に関する研究 : 実機適用化に向けた共鳴器手法の評価

概要

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Recent regulation on NOx emissions 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 which had single-burner at the atmospheric pressure. And, we applied the controlling system which automatically controls the resonator volume to minimize the oscillations amplitude based on the dynamic pressure signals in the combustion chamber. Nowadays, the low NOx combustor has several burners (multi-burner). It seems that there are some differences of combustion oscillations between multi-burner and single-burner. Therefore, the combustor which has multi-burner was tested to evaluate the resonator method. And, the effects of the inlet air temperatures were evaluated for the resonator method. The test results were shown in this paper.
2005-03-20