Numerical analysis on aerothermodynamic characteristics of blunt-nosed cone in free-piston shock tunnel HIEST

Tomoaki Ishihara, Reika Aizawa, Yousuke Ogino, Naofumi Ohnishi, Keisuke Sawada, Hideyuki Tanno

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

The measured pressure distributions of the blunt-nosed cone test model in Free-piston shock tunnel HIEST placed in JAXA Kakuda space center were compared with calculated results. At high total enthalpy conditions, the calculated pressure distribution was higher than the experimental one. As the cause for this discrepancy, first we focused on the chemical nonequilibrium model in the supersonic expanding region. Flowfield calculation with changes of chemical reaction rates of Park's model was conducted and the effect on pressure distribution was examined. Accelerating the dissociation reaction rate of O2 had most effect on the pressure coefficients. A good agreements with experimental values was obtained. Second, the effect of chemical composition in freestream was also investigated. The more undisociated O2 in freestream resulted in the more reduction of pressure. This implies that it is necessary to identify chemical compositions in freestream and evaluation of aerodynamic characteristics.

本文言語English
ホスト出版物のタイトル52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014
出版社American Institute of Aeronautics and Astronautics Inc.
ISBN(印刷版)9781624102561
DOI
出版ステータスPublished - 2014 1月 1
イベント52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014 - National Harbor, MD, United States
継続期間: 2014 1月 132014 1月 17

出版物シリーズ

名前52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014

Other

Other52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014
国/地域United States
CityNational Harbor, MD
Period14/1/1314/1/17

ASJC Scopus subject areas

  • 宇宙惑星科学
  • 航空宇宙工学

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