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ID 31639
本文ファイル
別タイトル
An Improvement of Lean Combustion Characteristics with Hydrogen Addition in a Rotating Tubular Flame : Burned Gas Temperature and Burned Gas Composition
著者
酒井 幸夫
太田 宏史
石原 敦
キーワード
Lean Combustion
Hydrogen Addition
Burned Gas Temperature
Burned Gas Composition
Rotating Tubular Flame
NDC
技術・工学
抄録(英)
A rotating tubular flame has received considerable attention in combustion research because it experiences flame curvature and flame stretch simultaneously. It is also interesting to note that the rotating tubular flame is very stable, and hence, addition of small amount of hydrogen enables lean combustion of heavy hydrocarbon fuels with this flame. In our previous report, it has been found that hydrogen addition of 3% by volume enables lean combustion up to the effective equivalence ratio of 0.1 for methane, and up to the ratio of 0.2 for propane flame. In this experiment, probing of the burned gas temperature and the burned gas composition were made. The results show that in the cases when hydrogen is added by 1, 2, and 3% by volume to methane/air mixture, and by 3% by volume to propane/air mixture, the burned gas temperature exceeds the temperature obtained by chemical equilibrium calculation (CEC) in some low fuel concentration ranges. In these ranges, the oxygen concentration in the burned gas becomes lower than that of CEC, while the water concentration exceeds that of CEC. These facts substantiate the validity of the previously postulated mechanism for extension of lean combustion that due to the effects of flame curvature and flame stretch, hydrogen preferentially diffuses across stream tube from the upstream, unburned gas side into the reaction zone, resulting in an increase of gas temperature and also of water concentration; then lean combustion is achieved.
掲載誌名
日本機械学會論文集. B編
71巻
701号
開始ページ
282
終了ページ
287
出版年月日
2005-01-25
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/110005051400
部局名
工学研究科