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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publication52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781624102561
DOIs
Publication statusPublished - 2014 Jan 1
Event52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014 - National Harbor, MD, United States
Duration: 2014 Jan 132014 Jan 17

Publication series

Name52nd 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
CountryUnited States
CityNational Harbor, MD
Period14/1/1314/1/17

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering

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    Ishihara, T., Aizawa, R., Ogino, Y., Ohnishi, N., Sawada, K., & Tanno, H. (2014). Numerical analysis on aerothermodynamic characteristics of blunt-nosed cone in free-piston shock tunnel HIEST. In 52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014 (52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014). American Institute of Aeronautics and Astronautics Inc.. https://doi.org/10.2514/6.2014-1390