ID#: 146
Abstract Title: Microscopic OH and CH Emission Images in Diffusion Flame with Micro Flames
Session Title: Chemistry in Flames I
Session Date: 7/31/01
Session Start Time: 11:20 AM
Contributing Author: Ida, T.
Organization: Kinki University
Country: Japan
Authors: Tamio Ida, Manabu Fuchihata, Yukio Mizutani
Short Abstract: To elucidate the nature of the mixing process in the structure of turbulent diffusion flames, it is extremely important to understand the change of the time-dependent stepwise components of the macroscopic and microscopic spatial structure of the flame. The experimental object was to store fundamental data of flame characteristics and to extract problem points by micro flame. An attention was given to initial conditions of the burner port, which are the hydrodynamic factors which make up the Reynolds number, and as a function of the Reynolds number, the range in which steady-state diffusion flames can be formed were observed. This study was visualized at CH image by direct photography and OH image by laser shadowgraphs. Especially, it was found that the buoyancy length from the end of the burner and the flame area thickness, which depend on the molecular diffusion rate of the fuel, were constant regardless of the initial burner port conditions.