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63499000.pdf5.34 MB
Other TitleImproved thermochemical models for CFRP ablator performance assessment
Author(jpn)鈴木 俊之; 藤田 和央
Author(eng)Suzuki, Toshiyuki; Fujita, Kazuhisa
Author Affiliation(jpn)宇宙航空研究開発機構 総合技術研究本部; 宇宙航空研究開発機構 総合技術研究本部
Author Affiliation(eng)Japan Aerospace Exploration Agency Institute of Aerospace Technology; Japan Aerospace Exploration Agency Institute of Aerospace Technology
Issue Date2007-03-30
PublisherJapan Aerospace Exploration Agency (JAXA)
Publication date2007-03-30
AbstractIn this study, computational methods are integrated to calculate the thermal response of an ablator in an arcjet flow. In this method, the arc-jet freestream condition in the test section is evaluated theoretically by calculating the flows in the arc-jet wind tunnel. The thermal response of the ablator is calculated by loosely coupling the shock layer computational fluid dynamics code and the two-dimensional version of the ablation code using the arc-jet freestream condition so evaluated. This method is applied to heating tests conducted in the 1 MW arc-jet wind tunnel for a single set of operating conditions. The influence of catalysis on the ablating surface and the effect of nitridation and surface roughness on the thermal response of the ablator are investigated. Comparison of the calculated and measured temperature profiles at the ablating surface suggests that the measured temperature profile can be reproduced by assuming a low catalytic efficiency for the surface. It is found that the nitridation reaction moderately increases the surface temperature, and that the effect of surface roughness is small under the present operating conditions.
DescriptionJAXA Research and Development Report
KeywordsCFRP; ablation; ablative material; thermal response; arc-jet wind tunnel; wind tunnel test; catalytic activity; temperature profile; ionized gas; computerized simulation; Navier-Stokes equation; shock layer; CFRP; アブレーション; アブレーション材料; 熱応答; アークジェット風洞; 風洞試験; 触媒活性; 温度プロフィル; 電離気体; 計算機シミュレーション; Navier-Stokes方程式; 衝撃層
Document TypeTechnical Report
JAXA Category研究開発報告
Report NoJAXA-RR-06-024

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