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ID 31649
本文ファイル
別タイトル
Effects of Rotation on Tubular Flames in an Axisymmetric Flow Field
著者
山本 和弘
平野 敏右
キーワード
Premixed Combustion
Swirling Flow
Stability
Flammability Limit
Tubular Flame
Pressure Diffusion
Structure
NDC
技術・工学
抄録(英)
Using an axisymmetric swirl-type burner with eight inlet slits, the effects of rotation on the structure and characteristics of tubular flames have been investigated for lean methane/air mixtures.Results show that with increasing intensity of rotation, (1) the flame diameter increases and the thickness of the luminous zone decreases, (2) the fuel concentration at extinction decreases, i. e., the stable region expands, (3) the radial temperature distribution becomes an M-shaped profile, and the maximum temperature T_f increases while the local minimum temperature T_c at the center decreases,and (4) the values of T_f and T_c vary in a complicated manner in the axial direction. These results are almost consistent with those of our previous experiment, and hence, it is confirmed that the flame structure and the flame characteristics are affected by rotation. As for these phenomena, several mechanisms such as pressure diffusion, radiative heat loss, viscous energy dissipation, and energy recirculation including diffusion of radical species have been proposed. The present experimental results provide the first, basic information on this practically important phenomenon, i. e., the extension of flammable range by rotation.
掲載誌名
日本機械学會論文集. B編
62巻
600号
開始ページ
3185
終了ページ
3190
出版年月日
1996-08-25
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/110002403155
部局名
工学研究科