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ID 31647
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別タイトル
Pressure Change and Flame Characteristics in a Stretched, Rotating Flow
著者
山本 和弘
キーワード
Premixed Combustion
Swirling Flow
Pressure Distribution
Diffusion
Mass Transfer
Tubular Flame
Flame Stretch
NDC
技術・工学
抄録(英)
To investigate the pressure change and flame characteristics in a stretched, rotating flow, tubular flames of a lean hydrogen, methane, or propane-air mixture have been numerically simulated. Results show that, with rotation, the flame temperature of hydrogen and methane mixtures increases monotonically, while, that of a propane mixture decreases. With an increase of the fuel concentration, the position at which the reaction rate is maximum increases, and the temperature change becomes small. As seen in the pressure distribution, the pressure decreases around the center, and a pressure gradient is formed. This pressure gradient is steep near the center, but decreases as the radial distance is increased. The fuel flux decreases with the increase of circumferential velocities because of the decrease in the pressure gradient. For these reasons, this temperature change could be explained in terms of the pressure diffusion which results in mass transport due to the pressure gradient. However, it is also found that, with rotation, the pressure decreases and the density changes. The velocities increase due to flow expansion, resulting in an increase of flame stretch. Thus, the flame characteristic change with rotation is explained with the coupling of pressure diffusion and stretch effects.
掲載誌名
日本機械学會論文集. B編
63巻
615号
開始ページ
3751
終了ページ
3757
出版年月日
1997-11-25
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/110002396701
部局名
工学研究科