Unsteady flow measurements of a slender delta wing in wing rock motion

Yuichi Hirose, Hiroki Nagai, Keisuke Asai

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

8 Citations (Scopus)


A delta wing sets up self-excited rolling oscillation known as "wing rock" when it is placed in flow at high angles of attack. In this study, wind-tunnel tests of a slender-delta wing with 80-deg sweep angle at subsonic speeds were conducted. The phase-lock technique with a fast-responding Pressure-Sensitive Paint (PSP) has been employed to visualize unsteady pressure distribution on the oscillating model during the entire wing-rock cycle. Analysis of the PSP results together with roll angle measurement and high-speed Schlieren images has revealed that the lag in the leading-edge vortex displacement and the delay of vortex breakdown play an important role in rocking motion of the delta wing. In the present experiment, PSP has proved to be a powerful tool to study the interaction of vortices with a model in rocking motion. This technique will be used to analyze the driving mechanism of the wing rock and its controlin details.

Original languageEnglish
Title of host publicationCollection of Technical Papers - 45th AIAA Aerospace Sciences Meetin
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
Number of pages12
ISBN (Print)1563478900, 9781563478901
Publication statusPublished - 2007
Event45th AIAA Aerospace Sciences Meeting 2007 - Reno, NV, United States
Duration: 2007 Jan 82007 Jan 11

Publication series

NameCollection of Technical Papers - 45th AIAA Aerospace Sciences Meeting


Other45th AIAA Aerospace Sciences Meeting 2007
Country/TerritoryUnited States
CityReno, NV

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering


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