伸長・回転流れにおける圧力変化と火炎特性

日本機械学會論文集. B編 63 巻 615 号 3751-3757 頁 1997-11-25 発行
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タイトル ( jpn )
伸長・回転流れにおける圧力変化と火炎特性
タイトル ( eng )
Pressure Change and Flame Characteristics in a Stretched, Rotating Flow
作成者
山本 和弘
収録物名
日本機械学會論文集. B編
63
615
開始ページ 3751
終了ページ 3757
抄録
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.
著者キーワード
Premixed Combustion
Swirling Flow
Pressure Distribution
Diffusion
Mass Transfer
Tubular Flame
Flame Stretch
NDC分類
技術・工学 [ 500 ]
言語
日本語
資源タイプ 学術雑誌論文
出版者
一般社団法人日本機械学会
発行日 1997-11-25
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
出版タイプ Version of Record(出版社版。早期公開を含む)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 0387-5016
[NCID] AN00187441
[NAID] 110002396701 ~の異版である