著者

森上 修

出版者

天理大学出版部

雑誌

ビブリア 天理図書館報 (ISSN:00060860)

巻号頁・発行日

no.127, pp.38-83, 2007-05

著者

森上 修 羽原 修 榎本 啓士 加藤 秀輝 三上 真人 佐藤 順一 河野 通方

雑誌

JASMA : Journal of the Japan Society of Microgravity Application (ISSN:09153616)

巻号頁・発行日

vol.12, no.4, pp.315-316, 1995-10-31

参考文献数

2

著者

村瀬 英一 森上 修 橋本 英樹 松崎 伊生

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集B編 (ISSN:18848346)

巻号頁・発行日

vol.79, no.805, pp.1839-1847, 2013 (Released:2013-09-25)

参考文献数

9

被引用文献数

1

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Spark ignition of premixed gases was experimentally studied. Minimum ignition energy and initial burning velocity, which is a burning velocity at an initial stage of flame propagation, were measured and their dependences on equivalence ratio were discussed. Minimum ignition energy takes a minimum value when equivalence ratio is around 0.9 for methane/air mixtures, and around 1.5 for n-butane/air mixtures, which corresponds with the study of Lewis and von Elbe. A shadowgraph technique was used to observe the growth of the flame kernels. A burning velocity was measured from the images of the flame kernel, and initial burning velocity was defined as a burning velocity at the moment when the equivalent radius of the flame kernel is approximately 3.0mm. Initial burning velocity takes a maximum value when equivalence ratio is around 0.9 for methane/air mixtures, and around 1.5 for n-butane/air mixtures, while laminar burning velocity of well-grown flame takes a maximum value when equivalence ratio is around 1.1 for both mixtures as known well. This is caused by the curvature of flame surface at the initial stage. It is suggested that the equivalence-ratio dependence of minimum ignition energy is derived from that of initial burning velocity.

著者

三上 真人 瀬尾 健彦 菊池 政雄 森上 修

出版者

山口大学

雑誌

基盤研究(B)

巻号頁・発行日

2012-04-01

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ジェットエンジン高空再着火時の燃料噴霧燃え広がりの理解を深めるために低圧における液滴列燃え広がりの微小重力実験行った.実験の結果,低圧での燃え広がり速度および燃え広がり限界はともに,大気圧の場合より大きくなることが明らかとなった.これらの圧力依存性について,燃え広がりに関わる素過程を考慮して考察を行った.高温領域の熱伝導速度は圧力に逆比例する.一方,高温領域の広がりの非定常性を考慮すると,その最大半径は圧力の-1/3乗に比例する.この圧力依存性を有する燃え広がり限界距離を考慮して,低圧におけるランダム分散液滴群の群燃焼発現特性を求めることができた.

著者

川添 裕三 橋本 英樹 森上 修 村瀬 英一 古川 純一

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.83, no.853, pp.17-00159-17-00159, 2017 (Released:2017-09-25)

参考文献数

8

被引用文献数

1

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To explore the behavior of near-extinction flamelets in turbulent premixed flames, emission intensities of OH, CH and C2 radicals of hydrocarbon-air premixed flames have been examined using the newly developed emission spectroscopy system. It has been shown in our previous study that the emission intensity ratio of 515.5 nm/470.5 nm bands of C2 radical uniquely depends on the temperature of unstrained methane/air and propane/air flames. In the present study, to establish the technique that estimates the temperature of the near-extinction flamelet of turbulent premixed flames, the relation between the temperature and the emission intensity ratio of 515.5 nm/470.5 nm bands of C2 radical of strained flames has been sought by using a counter-flow burner. The unique relation between the flame temperature and the emission intensity ratio of 515.5 nm/470.5 nm bands of C2 radical has been found to exist for the Propane-air and the Butane-air strained flames. Therefore, it can be concluded that the temperature of flamelets of the Propane-air and the Butane-air turbulent premixed flames can be estimated by using the relation between the temperature of the strained flame and the emission intensity ratio of 515.5 nm/470.5 nm bands of C2 radical obtained in the present study.