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Detailed Numerical Simulation on Dimethyl Ether/Oxygen Premixture Detonation Using Reduced Chemical Reaction Model -Disturbance of Cellular Structure-
http://hdl.handle.net/10228/0002001140
http://hdl.handle.net/10228/0002001140b58d75d4-9a49-4f75-a75e-9b6b694f6671
| 名前 / ファイル | ライセンス | アクション |
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10443933.pdf (643 KB)
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| アイテムタイプ | 共通アイテムタイプ(1) | |||||||||||||||||
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| 公開日 | 2025-01-21 | |||||||||||||||||
| タイトル | ||||||||||||||||||
| タイトル | Detailed Numerical Simulation on Dimethyl Ether/Oxygen Premixture Detonation Using Reduced Chemical Reaction Model -Disturbance of Cellular Structure- | |||||||||||||||||
| 言語 | en | |||||||||||||||||
| 著者 |
Kubota, Daiki
× Kubota, Daiki
× 坪井, 伸幸
WEKO
14118
× 小澤, 晃平
WEKO
23864
× Hahashi, A. Koichi
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| 抄録 | ||||||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||||||
| 内容記述 | Detonation is a phenomenon of self-sustained combustion in premixed gases, which is propagating at supersonic speed. In detonation, the flame propagates while the combustion wave and the shock wave interact with each other. Detonation has a unique propagation structure called a cellular structure. The cell is considered to be the trace of the triple points, which is the intersection of mach stem, incident shock, and transverse wave at the detonation wave front. The shock waves interfere with each other to generate small collisions, which are repeated to form cellular structures. In numerical analysis, the cellular structure can be visualized by plotting the maximum pressure history. The cellular structure is closely related to detonation instability. In general, detonations with disturbed cellular structures are more resistant to flow dilation and obstructions. Therefore, the study of detonation cellular structure is important for both hazard analysis and industrial applications. Dimethyl ether (DME) has attracted attentions as a new fuel as a new SOx-free fuel for diesel engines an thermal power generations due to its high cetane number[1]. In literature, there are a few investigations on the detonability of DME. In a numerical study, Mével et al.[2] showed that the detonation of DME/oxygen premixture is not a double cellular structure, but a substructure is observed. Ng et al.[3] studied the detonation of DME/oxygen premixture by experiment using a detonation tube. Reactive Fluid Dynamics Laboratory in Kyushu Institute of Technology has conducted an experimental study of DME-fueled Pulse Detonation Engines[4]. Although DME-fueled detonation has been studied for a long time, there is a lack of numerical analytical studies on disturbance of cellular structure and instability using reduced chemical reaction model. In this study, the numerical analysis of detonation in DME/oxygen premixture is performed using a reduced chemical reaction model; the detonation propagation characteristics are investigated; and the disturbance of the cellular structure is investigated. Unlike experiments, numerical analysis is characterized by the ability to visualize temperature and pressure contours and to easily calculate local values. A two-dimensional unsteady analysis was performed to investigate cellular structure disturbances in DME/oxygen premixture detonation, and a one-dimensional steady analysis is performed to calculate parameters related to cell structure disturbances. |
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| 言語 | en | |||||||||||||||||
| 備考 | ||||||||||||||||||
| 内容記述タイプ | Other | |||||||||||||||||
| 内容記述 | The 29th International Colloquium on the Dynamics of Explosions and Reactive Systems, 29th ICDERS, July 23 – 28 , 2023, SNU Siheung, Korea | |||||||||||||||||
| 言語 | en | |||||||||||||||||
| 書誌情報 |
p. ICDERS2023-193, 発行日 2023-07 |
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| 言語 | eng | |||||||||||||||||
| 資源タイプ | ||||||||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_5794 | |||||||||||||||||
| 資源タイプ | conference paper | |||||||||||||||||
| 出版タイプ | ||||||||||||||||||
| 出版タイプ | VoR | |||||||||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||||||||||
| URI | ||||||||||||||||||
| 識別子タイプ | URI | |||||||||||||||||
| 関連識別子 | http://www.icders.org/ICDERS2023/ | |||||||||||||||||
| 会議記述 | ||||||||||||||||||
| 会議名 | International Colloquium on the Dynamics of Explosions and Reactive Systems, 29th ICDERS, July 23 – 28 , 2023, SNU Siheung, Korea | |||||||||||||||||
| 回次 | 29 | |||||||||||||||||
| 開始年 | 2023 | |||||||||||||||||
| 開始月 | 07 | |||||||||||||||||
| 開始日 | 23 | |||||||||||||||||
| 終了年 | 2023 | |||||||||||||||||
| 終了月 | 07 | |||||||||||||||||
| 終了日 | 28 | |||||||||||||||||
| 開催国 | KOR | |||||||||||||||||
| 査読の有無 | ||||||||||||||||||
| 値 | yes | |||||||||||||||||
| 研究者情報 | ||||||||||||||||||
| URL | https://hyokadb02.jimu.kyutech.ac.jp/html/20_ja.html | |||||||||||||||||
| 論文ID（連携） | ||||||||||||||||||
| 値 | 10443933 | |||||||||||||||||
| 連携ID | ||||||||||||||||||
| 値 | 12654 | |||||||||||||||||
