このエントリーをはてなブックマークに追加
ID 31641
本文ファイル
別タイトル
Observations of the Propagating Flames in Vortex Rings Using an Image Intensifier
著者
森本 洋平
池田 未央
前川 拓也
滝 史郎
キーワード
Flames
Flame Speed
Flame Propagation
Vortex Ring
NDC
技術・工学
抄録(英)
Using a high-speed video camera with an image intensifier, observations have been made on the propagating flames in the vertex rings. From their intensified images, variations of the flame speed and the flame diameter along the vortex axis have been determined. Results show that there are four types of flame propagation, (1) steady flame propagation, (2) periodic flame propagation, (3) unsteady flame propagation, and (4) random flame propagation. The steady flame propagation occurs for the maximum tangential velocity V_<θmax>>7 m/s (Re<__-10^4) and its local flame speed is almost constant during the propagation. The periodic flame propagation is originated from the longitudinal instability of the vortex ring, which occurs around V_<θmax> &ap; 7 m/s in this experiment. (3) The unsteady flame propagation is accompanied with strong flame acceleration and deceleration, while its mean flame speed from ignition to the end is almost equal to the maximum tangential velocity. The random flame propagation occurs in turbulent vortex rings. The flame speed changes randomly. The luminous zone is quenched shortly behind the flame and its mean flame speed becomes much lower than the maximum tangential velocity.
掲載誌名
日本機械学會論文集. B編
67巻
653号
開始ページ
219
終了ページ
225
出版年月日
2001-01-25
出版者
一般社団法人日本機械学会
ISSN
0387-5016
NCID
言語
日本語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
社団法人日本機械学会
本文データは学協会の許諾に基づきCiNiiから複製したものである
関連情報URL(IsVersionOf)
http://ci.nii.ac.jp/naid/110002397461
部局名
工学研究科