Combustion Mechanism Downstream of a Cavity Flameholder Interacting with an Incident Shock Wave in Supersonic Flow
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- KOBAYASHI Hideaki
- 連絡先著者(Corresponding author):kobayashi@ifs.tohoku.ac.jp 東北大学流体科学研究所
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- ISHIMOTO Yumi
- 東北大学流体科学研究所
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- KUDO Taku
- 東北大学流体科学研究所
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- HAYAKAWA Akihiro
- 東北大学流体科学研究所
Bibliographic Information
- Other Title
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- 超音速流における衝撃波干渉するキャビティー保炎器下流の燃焼メカニズム
- チョウオンソクリュウ ニ オケル ショウゲキハ カンショウ スル キャビティーホエンキ カリュウ ノ ネンショウ メカニズム
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Abstract
The objective of this study is to explore the effects of incident shock waves on combustion downstream of a cavity flameholder. The images of flame chemiluminescence showed that the flame looks extinguished downstream of an incident shock wave, as well as OH-PLIF measurements indicated higher OH concentration upstream of the incident shock wave, while lower OH concentration downstream of the incident shock wave. The results of two-dimensional numerical simulations for reacting flows showed that the incident shock wave generates a strong recirculation zone and reverse flows, and the main flow curved around the zone, corresponding well to the flame structure seen by experiments. In addition, it was found that about 90% of the injected H2 was converted to H2O at the rear edge of the calculated wall domain when an incident shock wave was introduced, which means that cavity-stabilized flames is not extinguished by the incident shock wave but burnt out there, thus the fuel was almost fully consumed. That is to say, the incident shock wave enhances chemical reactions because the generated recirculation zone and low speed region increases residence time and increased turbulent kinetic energy enhances the mixing.
Journal
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- JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES
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JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES 64 (2), 97-103, 2016
THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES
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Details 詳細情報について
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- CRID
- 1390001204470963072
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- NII Article ID
- 130005143909
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- NII Book ID
- AA11307372
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- ISSN
- 24323691
- 13446460
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- NDL BIB ID
- 027260623
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed