トンネル状空間を伝ぱする水素予混合火炎の基礎燃焼特性に関する実験的検討
書誌事項
- タイトル別名
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- An Experimental Study of Hydrogen Premixed Flames Propagating in Tunnel Simulated Channel
説明
<p>One of the dangers latent in the hydrogen society is that hydrogen has much larger possible for the deflagration to detonation transitions (DDT) than ordinary hydrocarbon fuels, because of its higher laminar burning velocity and wider detonability limits. DDT may easier occur in a long and narrow space such as tunnels and ducts. It is important to be developed for predicting and preventing serious fire or explosion, and detonation. The present study is performed to investigate experimentally the deflagration flame of hydrogen mixtures propagating in a tunnel simulated channel (10x10x2440 mm) with special attention to flame front configurations and speeds, because of DDT caused mostly by enhancement of the flame front propagation. Hydrogen-air mixtures with 0.3~0.4 of equivalence ratio and hydrogen mixtures having nearly the same laminar burning velocity SLO with ɸ=0.4~0.7 are prepared, in order to examine effects of the laminar burning velocity and the equivalence ratio on enhancement of the flame speeds. The flame shape and speeds are obtained by using sequential schlieren images recorded under conditions with the center ignition and the both-ends open of channel. The results show that the flame propagation is oscillating due to acoustic instability. Some flames also shows to begin to accelerate after traveling a distance, so that the factors of flame acceleration are discussed.</p>
収録刊行物
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- 水素エネルギーシステム
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水素エネルギーシステム 32 (3), 24-31, 2007
一般社団法人 水素エネルギー協会
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キーワード
詳細情報 詳細情報について
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- CRID
- 1390011329181590784
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- ISSN
- 24365599
- 13416995
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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
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- 抄録ライセンスフラグ
- 使用可
