書誌事項
- タイトル別名
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- The Instability of Flame Fronts in Premixed Combustion of Low-Temperature Gases (Effects of Unburned-Gas Temperature)
抄録
We performed two-dimensional unsteady calculations of reactive flows, based on the compressible N-S equation, to study the effects of unburned-gas temperature on the instability of flame fronts. As the unburned-gas temperature became lower, the growth rate decreased and the unstable range narrowed. This was due mainly to the reduction of the burning velocity of a planar flame. The normalized growth rate increased with a decrease of the unburned-gas temperature, and the normalized unstable range widened at Lewis numbers smaller than unity. This was because that the thermal-expansion effects became stronger owing to the increase of the temperature ratio of burned and unburned gases, and that the diffusive-thermal effects strengthened at Lewis numbers smaller than unity owing to the increase of the Zeldovich number. Moreover, the cellular shape of flame fronts formed, which was due to intrinsic instability. The normalized burning velocity of a cellular flame increased as the unburned-gas temperature became lower, especially in premixed flames with small Lewis numbers.
収録刊行物
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- 日本機械学会論文集Ｂ編
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日本機械学会論文集Ｂ編 79 (803), 1391-1395, 2013
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390001206261779840
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- NII論文ID
- 130003374866
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- ISSN
- 18848346
- 03875016
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可