かくはん燃焼器内のイオン電流特性(熱工学,内燃機関,動力など)

概要

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A stirred reactor was newly designed and the structure of the low Damkohler number flame was investigated. The visual observation by schlieren photography does not indicate the occurrence of the thin flame under low Damkohler number as proposed by Peters. Further investigation is carried out by concentration measurement of the reacting species. Ion current was also measured in the reaction zone. Ion current has no sharp peaks, which are typical feature of te thin laminar flame. In the vicinity of the injector, ion current ws low but mean ion current increases with the radal distance and shows the wavy form. This indicates that in one region, the chemical reaction is active and in another, the chemical reaction is inactive. The power spectra of the ion current show no peaks. The distributed reaction zone regime was confirmed to exist. From the cross-correlation of the ion current, it was found that the reaction zone conjectured to be reacting eddies or thick reaction zones of the order of 4〜5 mm. These reacting eddies or zones are transported by the mean convection velocity of the flow field. From these experimental results, it can be concluded that the mechanism of reactions are quite different from that of the wrinkled laminar flame.
社団法人日本機械学会の論文
2002-11-25