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 contributionpeer-review


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 O2had 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 O2in 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 Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Electronic)9781624102561
Publication statusPublished - 2014
Event52nd Aerospace Sciences Meeting 2014 - National Harbor, United States
Duration: 2014 Jan 132014 Jan 17

Publication series

Name52nd Aerospace Sciences Meeting


Conference52nd Aerospace Sciences Meeting 2014
Country/TerritoryUnited States
CityNational Harbor


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