燃焼振動の低減法に関する研究 : 運転条件と燃焼振動の実験的研究

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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. This paper describes the characteristics of combustion oscillations in premix combustor which simulates combustion conditions of can type gas turbine combustor. Combustion tests were performed under the atmospheric pressure with natural gas. The effects of swirl strength, 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.
2004-05-20