Effects of Transversely Flame Jetting into Channel from Sub-chambers on Flame Accelerations and Detonation Transition Distances
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- MAEDA Shinichi
- Saitama University
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- AOSHIMA Ryota
- Saitama University
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- KUROSAWA Tetsuro
- Saitama University
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- ICHIKAWA Akinori
- Institute of Fluid Science, Tohoku University
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- OBARA Tetsuro
- Saitama University
Bibliographic Information
- Other Title
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- 流路直交型副室を用いたフレームジェットの火炎加速およびデトネーション遷移距離に及ぼす影響
- リュウロ チョッコウガタ フクシツ オ モチイタ フレームジェット ノ カエン カソク オヨビ デトネーション センイ キョリ ニ オヨボス エイキョウ
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Abstract
<p>Sub-chambers were used to initiate the detonation wave by injecting a flame-jet into the detonation tube. A configuration of the sub-chamber was divided into five types by changing the number of sub-chambers and the directions of flame injection. The detonation tube had a cross area of 50 × 50 mm, a length of 775 mm and equipped a window section for a visualization of the flowfield. The test gas was a stoichiometric premixed gas of hydrogen and oxygen and the initial pressure was constant as 80 kPa. The experimental results showed that the detonation transition distance was about 60% shorter than the case of spark ignition without flame-jet. Increasing the number of sub-chambers and colliding flame-jets emanating from counter positions resulted in decreasing the detonation transition distance. Schlieren photographs showed that the flame-jets promoted the formation of leading shock wave ahead of the turbulent flame in a short distance. Pressure measurements on the end wall of the detonation tube indicated that the shock or compression waves were reflected repeatedly in the cross-section, leading to a pressure wave and flame interaction. For the flame-jet initiation using the sub-chambers, generating turbulent flow in the premixed gas was of importance to promote the detonation transition.</p>
Journal
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- Journal of the Combustion Society of Japan
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Journal of the Combustion Society of Japan 57 (181), 222-231, 2015
Combustion Society of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390282680176251008
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- NII Article ID
- 130006320853
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- NII Book ID
- AA11658490
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- ISSN
- 24241687
- 13471864
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- NDL BIB ID
- 026684831
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed