混合気の濃度不均質が火炎伝ぱに及ぼす影響 : 第1報, 定容容器内の混合気の濃度分布と乱流特性〔熱工学, 内燃機関, 動力など〕

概要

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An experimental study was carried out in a constant volume combustion chamber for clarification of the effects of non-homogeneous concentration distributions of the fuel-air mixture on the flame propagation. The mixture of propane-air was prepared by the reciprocating movements of a pair of perforated plates. The laser sheet Rayleigh scattering method was applied for a quantitative visualization of the mixture concentration fields, and the degree of inhomogeneity of the mixture distribution over the measurement plane was determined. The flow in the chamber and its turbulence characteristics were measured by the Laser Doppler Velocimeter technique. The degree of inhomogeneity of the mixture distribution decreases with increase of the number of the reciprocating motion of the perforated plates. The turbulence intensity decays rapidly after mixing. By changing of the mixing numbers and the delay time after mixing, the distribution of the mixture and the turbulence intensity can be changed independently, which makes it possible to investigate the effects due purely to the mixture heterogeneity on the flame behavior.
一般社団法人日本機械学会の論文
1997-08-25