Reentry capsule dynamic instability with different aft-body shape in transonic flow

Masayuki Nomura, Arthur Robbe, Koji Fujita, Hiroki Nagai

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

3 Citations (Scopus)


The pitching oscillation and the flow field around blunt-body reentry capsule at transonic speeds are studied by transonic wind tunnel experiment using two different model shapes. Dynamic instability such as pitching oscillation greatly influences the flight control and landing accuracy of a capsule, hence understanding the flight characteristics is a significant. In this study, we focus on the influence of flow separation and reattachment on the aft-body, and perform the experiments using a one-degree-of-freedom free-rotation test method. The effect of aft-body shape is investigated by comparing the resulting differences in pitching oscillation tendency and flow field. The results show that dynamic instability is strengthened in a shallower aft-body angle model. It is possible to see from examining the flow field visualization results that there are notable differences on the flow separation and reattachment and its hysteresis. It is speculated that these differences influenced the pitching oscillation in a shallower aft-body angle model.

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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