Numerical study of unsteady high enthalpy flow in an expansion tube

Kazumasa Kitazono, Masayuki Takahashi, Naofumi Ohnishi, Hideyuki Tanno

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

2 Citations (Scopus)


Unsteady flow dynamics driven in an expansion tube was numerically reproduced by solving the axisym-metric compressible Navier-Stokes equations. The adaptive-mesh-refinement (AMR) technique was used to suppress a carbuncle phenomenon in the expansion tube. A numerical instability was sufficiently suppressed by utilizing a grid refined around the strong shock wave based on more than seventh level AMR. The maximum thickness of a boundary layer was estimated at approximately 16.5% of a radius of the expansion tube in a viscous flow. However, a speed of the shock wave obtained in the simulation was higher than measurements. The cause of the discrepancy was suspected for the high-temperature real-gas effect in the experiments.

Original languageEnglish
Title of host publicationAIAA Scitech 2019 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105784
Publication statusPublished - 2019 Jan 1
EventAIAA Scitech Forum, 2019 - San Diego, United States
Duration: 2019 Jan 72019 Jan 11

Publication series

NameAIAA Scitech 2019 Forum


ConferenceAIAA Scitech Forum, 2019
Country/TerritoryUnited States
CitySan Diego

ASJC Scopus subject areas

  • Aerospace Engineering


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