書誌事項
- タイトル別名
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- Influence of Characteristic Chemical Reaction Time on Burning Velocity of Hydrogen-Premixed Micro-Scale Spherical Laminar Flames
説明
Comprehension of the burning velocity for micro-scale flames is inevitable in the improved design of micro-combustors for miniaturized power supplies. The present study is performed to examine experimentally the burning velocity characteristics of hydrogen-premixed micro-scale spherical laminar flames in the range of flame radius rf < 5 mm, and also macro-scale laminar flames with rf > 7 mm for comparison. The mixtures have nearly the laminar burning velocity SL0 at so-called unstretched flames with different equivalence ratios (φ=0.3-1.2). In this experiment, the values of the SL0 are fixed at approximately 15, 25 and 35 cm/s, in order to examine the influence of characteristic chemical reaction time on micro-scale spherical laminar flames. The radius and the burning velocity of micro-scale flames are obtained by using sequential schlieren images recorded under appropriate ignition conditions. The results show that the burning velocities of micro-scale flames with φ=0.3 and 0.5 or 1.2 have a tendency to decrease or increase with increasing rf and approach that of macro-scale flames, but such a trend can not be seen for φ0.7 and 0.9 micro-scale flames, irrespective of SL0. It is also found that the optimum size and Karlovitz number to improve the burning velocity are existed for φ0.7 and 0.9 micro-scale flames, irrespective of SL0.
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 77 (773), 168-176, 2011
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
- 1390282681239157248
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- NII論文ID
- 130000873928
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- ISSN
- 18848346
- 03875016
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- OpenAIRE
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- 抄録ライセンスフラグ
- 使用不可
