熱音響的能動制御による燃焼騒音及び振動燃焼の抑制

概要

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In order to suppress combustion noise in an experimental lean premixed dump combustor, a feed -back combustion control system was constructed based on the active noise control (ANC) principle. Secondary diffusion flames were used as a secondary sound source. The controller consists of a time-delay circuit, an amplifier and a band-pass filter, so that the control parameters are delay time, a gain and cut-off frequencies. The fuel flow rate for the secondary flames was modulated by the piezo-valves. The influence of the control parameters on suppression of combustion noise was investigated. Through clear periodicity of suppression effect on delay time, experimental results confirm that the suppression is due to the acoustic interaction between the main flame and the secondary flames.
社団法人日本ガスタービン学会の論文
2005-05-20