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<論文>噴き出し気体の化学反応が鈍頭物体の空力加熱に及ぼす効果
https://jaxa.repo.nii.ac.jp/records/32441
https://jaxa.repo.nii.ac.jp/records/324413c60cc99-a8fe-453a-b1b7-e6f10ad6a7b8
名前 / ファイル | ライセンス | アクション |
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SA0125689.pdf (722.4 kB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2015-03-26 | |||||
タイトル | ||||||
タイトル | <論文>噴き出し気体の化学反応が鈍頭物体の空力加熱に及ぼす効果 | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
その他のタイトル(英) | ||||||
その他のタイトル | The Effect of Chemical Reactions of the Injected Gas on the Aerodynamic Heating to the Blunt Bodies | |||||
著者 |
辛島, 桂一
× 辛島, 桂一× 中橋, 和博× KARASHIMA, Keiichi× NAKAHASHI, Kazuhiro |
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著者所属 | ||||||
東京大学宇宙航空研究所 | ||||||
著者所属 | ||||||
東京大学宇宙航空研究所 | ||||||
著者所属(英) | ||||||
en | ||||||
Institute of Space and Aeronautical Science, University of Tokyo | ||||||
著者所属(英) | ||||||
en | ||||||
Institute of Space and Aeronautical Science, University of Tokyo | ||||||
出版者 | ||||||
出版者 | 東京大学宇宙航空研究所 | |||||
書誌情報 |
東京大学宇宙航空研究所報告 巻 14, 号 4_A, p. 1111-1127, 発行日 1978-11 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | 本報告は,物体表面から噴き出す気化したアブレーション物質が気流中で燃焼する場合,その化学反応が物体表面の空力加熱に及ぼす効果を調べたものである.反応は化学平衡にあると仮定し,テフロンのアブレーションを想定して鈍頭軸対称物体まわりの極超音速流が,Viscous-Shock-Layer方程式を用いて数値的に解かれ,結果が不活性気体の噴き出しの場合と比較されている. 噴き出し率が比較的小さい場合,噴き出しによる冷却効果より燃焼による加熱効果が卓越する結果,熱伝達率が大幅に増加する.噴き出し率が大きくなると,よどみ点近傍では冷却効果が卓越するが,これは酸素の拡散不足によるものであり主要な化学反応はよどみ点下流で起こり,そこではかなり顕著な熱伝達率のピークの生じる事が示されている.更に,化学反応が存在する場合の熱伝達率を,噴き出しのない場合の熱伝達率から評価するために提案された既存の近似式は実際の現象を正確に記述しないことが示され,この相違は噴き出し率の増加と共に大きくなる事が明らかにされている. | |||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | This paper is concerned with the effects on aerodynamic heating of chemical reactions of the gaseous materials injected into a shock layer flow due to ablation. Presuming the ablation of teflon and the equilibrium chemical reactions, a hypersonic flow past blunt-nosed axisymmetric bodies is solved numerically using VSL equations and the results are compared with those for an equivalent inert gas. In the case of small coolant injection, it is shown that a considerable increase of surface heating rate occurs in the stagnation region for the reason that the heating effect due to chemical reactions near the surface is predominating compared with the cooling effect due to the injection. With the increase of coolant injection the cooling effect grows to be predominating in the stagnation region because of the shortage of diffusion of oxygen, while a remarkable peak in heating rate arises at a distance downstream of the stagnation point, indicating that most of the chemical reactions takes place there. Finally, it is stressed that the existing approximate formula, proposed for estimating the local heating rate with chemical reactions between the injected and environmental gases from the data without injection, dose not predict the real feature of the phenomenon accurately and this discrepancy becomes significant as the injection rate grows. | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0563-8100 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN00161914 | |||||
資料番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 資料番号: SA0125689000 |