管状火炎バーナにおける高周波振動燃焼(熱工学,内燃機関,動力など)
日本機械学會論文集. B編 75 巻 753 号
1197-1204 頁
2009-05-25 発行
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この文献の参照には次のURLをご利用ください : https://ir.lib.hiroshima-u.ac.jp/00031637
ファイル情報(添付) |
110007226604.pdf
735 KB
種類 :
全文
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タイトル ( jpn ) |
管状火炎バーナにおける高周波振動燃焼(熱工学,内燃機関,動力など)
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タイトル ( eng ) |
High-Frequency Oscillatory Combustion in Tubular Flame Burners(Thermal Engineering)
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作成者 |
白神 洋輔
石井 一洋
藤 秀実
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収録物名 |
日本機械学會論文集. B編
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巻 | 75 |
号 | 753 |
開始ページ | 1197 |
終了ページ | 1204 |
抄録 |
High-frequency oscillatory combustion in tubular flame burners has been experimentally investigated using two prototype burners of 1MW and 2MW. Oscillatory combustion regions have been mapped in the plane of equivalence ratio and air flow rate, and pressures fluctuations also have been recorded. Results show that large-amplitude, high-frequency oscillatory combustion occurs for near stoichiometric mixtures and when the mean axial velocity exceeds about 5m/s. With increasing the air flow rate, the oscillatory combustion region gradually expands on both lean and rich sides. According to FFT analyses, the peak frequencies during the oscillatory combustion exceed 1000Hz. A simple analysis shows that these high frequencies cannot be explained on the basis of the Helmholtz resonator, or attributed to the axial mode of acoustic instability of the burner tube. These high frequencies can be explained on the basis of coupling of tangential and radial modes of acoustic instability of the burner tubes. Just before the onset of the intense oscillatory combustion, the fundamental tangential mode, which is of asymmetry, appears, and during the subsequent intense oscillatory combustion, higher radial modes appear coupled with the asymmetric and symmetric tangential modes. Since the first asymmetric tangential mode of acoustic instability seems to trigger the intense, high-frequency oscillatory combustion, it is suggested to design the burner as symmetric as possible, and in addition, to make the flame as round as possible.
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著者キーワード |
Oscillating Combustion
Swirl
Noise
Combustion
Burner
Tubular Flame
Acoustic Oscillation
Helmhortz Resonance
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NDC分類 |
技術・工学 [ 500 ]
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言語 |
日本語
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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
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発行日 | 2009-05-25 |
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
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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] 110007226604
~の異版である
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