Research Project
Grant-in-Aid for Scientific Research (B)
The world's first demonstration of the Martian atmospheric entry equivalent environment has been successfully conducted at the light-gas gun test facility by increasing the projection velocity of a projectile of 15.7 mm in diameter simulating the Martian atmospheric entry capsule and by optimizing the operational conditions of the light-gas gun. Utilizing this test environment, the world’s first direct measurement of the real-gas aerodynamic coefficients of the capsule has been successfully achieved by making a projectile fly freely in a 2.7-m long test section, observing its motion through four windows by a newly developed motion capture system, reconstructing evolution of the capsule dynamics by image processing software, and by deducing the real gas aerodynamic coefficients to reproduce the observed motion as an inverse problem. Accuracy of the state-of-the-art numerical code to predict the real-gas aerodynamic coefficients has been assessed as well.
従来は実在気体空力係数の不確かさのために，火星大気突入機の設計は冗長設計を余儀なくされ，その結果として搭載貨物の質量に制約が生じていたが，本研究によって，火星大気突入機の空力設計の妥当性を飛行前に地上実験によって高い精度で検証する技術の獲得に見通しが得られた．これにより，高精度定点着陸を実現するために必須である火星着陸機の空力特性の高精度化と信頼性向上が実現し，大気突入技術における我が国の技術優位性が獲得され，その結果として火星着陸機の開発において先導的な役割を果たすことによって，国際探査の枠組みの中で我が国の確固たる地位を確立することができると期待される．
All 2020 2019 2018 2017 Other
All Int'l Joint Research (2 results) Journal Article (5 results) (of which Int'l Joint Research: 1 results, Peer Reviewed: 5 results) Presentation (63 results) (of which Int'l Joint Research: 22 results, Invited: 4 results) Book (1 results)
Journal of Journal of Thermophysics and Heat Transfer
Volume: TBD
Journal of Thermophysics and Heat Transfer
Volume: 32 Issue: 1 Pages: 184-195
10.2514/1.t5134
Volume: 32 Issue: 1 Pages: 256-261
10.2514/1.t5133
TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN
Volume: 16 Issue: 1 Pages: 19-27
10.2322/tastj.16.19
130006301910
Volume: 印刷中 Issue: 3 Pages: 813-815
10.2514/1.t5254
