Heat flux anomaly in high-enthalpy and high reynolds number flow

Hideyuki Tanno, Tomoyuki Komuro, Kazuo Sato, Katsuhiro Itoh, Masahiro Takahashi, Tomoaki Ishihara, Yousuke Ogino, Keisuke Sawada

研究成果: Conference contribution

5 引用 (Scopus)

抜粋

The series of aerodynamic heating test campaigns with blunt shaped models in hypersonic high-enthalpy flow were conducted in JAXA-HIEST. Four different blunt shaped models were applied in this study; Apollo CM 6.4% scale model, HRV capsule 6% scaled model and two hemi-sphere probes with radius of curvature r=20mm and r=100mm. Numerical analysis with an axis-symmetric Navier-Stokes thermo-chemical non-equilibrium code was also conducted. Stagnation pressure was almost fixed to P0=50MPa, while stagnation enthalpy was varied from H0=7MJ/kg to 21MJ/kg. The unit Reynolds number under the condition was 0.9million/m to 3million/m and the boundary layer was hence mainly fully laminar flow. Abnormal high-heat flux was observed under high enthalpy condition (H0>10MJ/kg), which anomalies were almost twice higher than those of numerical calculations or theoretical ones. The measurement with four different blunt models showed that the abnormal heat flux was increased as stagnation enthalpy. From the analysis of compression process of the free-piston driver, radiation heating from driver gas does not seem to explain this heating anomaly. The numerical analysis implied that the heating anomaly was related to radiation from unknown atoms or molecules in shock layer.

元の言語English
ホスト出版物のタイトル43rd AIAA Thermophysics Conference 2012
出版物ステータスPublished - 2012 12 1
イベント43rd AIAA Thermophysics Conference 2012 - New Orleans, LA, United States
継続期間: 2012 6 252012 6 28

出版物シリーズ

名前43rd AIAA Thermophysics Conference 2012

Other

Other43rd AIAA Thermophysics Conference 2012
United States
New Orleans, LA
期間12/6/2512/6/28

ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanical Engineering
  • Condensed Matter Physics

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  • これを引用

    Tanno, H., Komuro, T., Sato, K., Itoh, K., Takahashi, M., Ishihara, T., Ogino, Y., & Sawada, K. (2012). Heat flux anomaly in high-enthalpy and high reynolds number flow. : 43rd AIAA Thermophysics Conference 2012 (43rd AIAA Thermophysics Conference 2012).