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A Study of Transient Ablation of Blunt Bodies
https://jaxa.repo.nii.ac.jp/records/34559
https://jaxa.repo.nii.ac.jp/records/34559d7e4bb9a-754e-4433-b9ae-2231716a48af
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
SA2401388.pdf (1.3 MB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||
|---|---|---|---|---|---|---|---|---|
| 公開日 | 2015-03-26 | |||||||
| タイトル | ||||||||
| タイトル | A Study of Transient Ablation of Blunt Bodies | |||||||
| 言語 | en | |||||||
| 言語 | ||||||||
| 言語 | eng | |||||||
| 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 | |||||||
| 著者 |
NAKAHASHI, Kazuhiro
× NAKAHASHI, Kazuhiro
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| 著者所属（英） | ||||||||
| en | ||||||||
| National Aerospace Laboratory | ||||||||
| 出版者 | ||||||||
| 出版者 | 東京大学宇宙航空研究所 | |||||||
| 出版者（英） | ||||||||
| 出版者 | Institute of Space and Aeronautical Science,University of Tokyo | |||||||
| 書誌情報 |
en : ISAS report/Institute of Space and Aeronautical Science,University of Tokyo 巻 45, 号 6, p. 99-126, 発行日 1980-06 |
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| 抄録（英） | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | This paper gives the results of a numerical approach to transient thermal response of ablating blunt bodies made of teflon. A simplified thermal model is proposed to solve thermal field in the ablator having phase transition. The viscous shock-layer flow and heat conduction in the ablator are calculated using an alternately iterative scheme, and the transient thermal response of the ablating bodies is discussed in detail with emphasis on the effects of chemical reactions of the ablation products. It is shown that the chemical reactions such as combustion of the ablation products in the shock layer modify characteristics of the wall heating rate significantly, and the existing simple formula, which is proposed for estimating surface heating rate with reactive coolant injection, cannot predict the real heating characteristics over the ablating surface. As soon as the ablation occurs at the stagnation point, combustion of the ablation products in the shock layer causes an abrupt increase in local heating rate there. However, as the time elapses, the cooling effect of the ablation injection becomes increasingly predominant because the ablation rate grows and this, in turn, reduces the local heating rate in the stagnation region. Thus, the location of the peak heating moves downstream with the time elapsed. A thermal accommodation analysis reveals that the net heating rate to inside of the ablator is not affected seriously by the combustion because thermal decomposition of the ablator is so accelerated as to absorb the increase of heat input efficiently in the heat of depolymerization. | |||||||
| ISSN | ||||||||
| 収録物識別子タイプ | ISSN | |||||||
| 収録物識別子 | 0372-1418 | |||||||
| 書誌レコードID | ||||||||
| 収録物識別子タイプ | NCID | |||||||
| 収録物識別子 | AA00675986 | |||||||
| 資料番号 | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | 資料番号: SA2401388000 | |||||||
