空間〜時間2点相関による乱流拡散火炎構造の実験的研究

概要

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We discuss in detail the various thermal diffusion mechanisms on the basis of spectral analyses of turbulent diffusion flames. Spatially and time-resolved structures of turbulent diffusion flames were obtained by two-point laser Rayleigh spectroscopy (LRS) which did not directly interfere with the combustion media during measurement. The turbulent diffusion flame structures were divided into 4 regions based on the characteristics of their spectral analysis of time-dependent temperature signals. In order to discuss the macroscopic thermal diffusion mechanism, the coherent function from cross and power spectral functions at Regions I〜IV were analyzed. From these analyses, the following diffusion characteristics at each region were revealed. Region I: three-dimensional diffusion mechanism (x-, r-, z-axes), Region II: one-dimensional diffusion mechanism (z-axis), Region III: two-dimensional diffusion mechanism (x-, z-axes), Region IV: no diffusion mechanism.
近畿大学工業高等専門学校の論文
1995-09-01