レーザシート法による予混合乱流伝ぱ火炎の構造に関する研究

概要

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The structure of premixed turbulent flames in a constant-volume vessel was investigated using a microprobe method and laser tomography. The microprobe method was used to measure the flame propagation speed, the total thickness of the flame zone and the number of flamelets existing in the flame zone. Laser tomography was used to visualize the structure of the flame by passing a laser sheet (0.2 mm thick and 2 cm wide) through the turbulent flames to obtain their 2-D images. From the obtained images, islands of reactants as well as of products were found, at least in the 2-D images, when the turbulence intensity was above 0.4 m/s. Then, in order to obtain a rough measure of the thickness of the turbulent flame reaction sheet, the light intensity of the images was digitized and processed into three colors (black, gray and white), incorporating two appropriate threshold values in the analysis. The obtained mean thickness of the gray area, assumed to be the flame reaction sheet, showed a slight increase with turbulence intensity.
一般社団法人日本機械学会の論文
1993-10-25