著者

佐野 寛 中村 富三

出版者

一般社団法人 日本エネルギー学会

雑誌

燃料協会誌 (ISSN:03693775)

巻号頁・発行日

vol.56, no.5, pp.345-350, 1977-05-20 (Released:2011-10-21)

参考文献数

6

被引用文献数

1

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Flame of H2 is almost colorless and hardly visible by eyes. A method was investigated to visualize the H2-flame by addition of a small amount of hydrocarbon gas, such as CH4, C3H8, C3H6, and C2H2.The flame luminosity generally decreased both with increase of λ1 (premixed air/ fuel ratio) and H2 fraction in fuel gas, except for highly carbon-sooty flame.In diffusion flame of H2, some hydrocarbons (C3H8, C3H6 and C2H2) were very effective to increase the luminosity by a factor of 102 with addition of 10 eq-% (equivalent fraction of hydrocarbon in fuel) and by a factor of 103 with 20 eq-%, respectively. CH4 was less effective that the luminosity increased only by a factor of 10 with addition of 50 eq-%.In premixed flame of H2, the effect of hydrocarbon addition was not significant. However, C3H8, C3H6, and C2H2 could increase the luminosity by a factor of 3, -10 with addition of 20 ep-% of them. The addition of above 20 eq-% of hydrocarbon had no further effect on increasing the luminosity.