火炎面プラズマ電位信号による予混合乱流伝ぱ火炎構造の考察

概要

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A method using an ion probe to detect a flame by its plasma potential signal has been developed. The spatial resolution of the probe is demonstrated to be well improved over that of the conventional one. The plasma potential signal obtained by this method from a premixed propagating turbulent flame front shows one to six peaks for the investigated flames, each of them being regarded as a flamelet in the reaction zone of the flame. Based on this consideration, the propagating speed, the thickness of the reaction zone and the number of flamelets in the zone, the separation distance between two adjacent flamelets, etc. of the flame, were then obtained. Results of this experiment suggest the existence of "reactant islands" in the reaction zone, and show that the averaged number of flamelets in the zone increases with an increase in the turbulence intensity and/or a decrease in the Damkohler number.
一般社団法人日本機械学会の論文
1990-01-25