組織構造を伴う平面せん断拡散火炎の音響励起 : 二次元位相平均分布測定へのアクティブ燃焼制御の応用

概要

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In the previous paper, it was shown that the acoustic excitation of a plane diffusion flame enhances the periodicity and intensity of organized-eddy-controlled combustion. The main objective in this paper is, thus, to examine phase characteristics of the excited eddy flames with high periodicity. A computer-aided phase-locked averaging method is employed to obtain graphical 2D contour maps of the instantaneous profiles of temperature and CH emission. Both maps of eight consecutive phases indicate clearly not only the periodic behavior of the organized eddy flame, but also the gas dynamic properties peculiar to those flames with coherent structure. The profiles of local contribution of the sound field to the combustion process are also examined by calculating the 2D distribution of the local Rayleigh index. The latter shows that the organized eddy flames have high sensitivity to sound, and play an important role in a sound-flame interaction.
一般社団法人日本機械学会の論文
1993-11-25