TY - GEN
T1 - Unsteady flow measurements of a slender delta wing in wing rock motion
AU - Hirose, Yuichi
AU - Nagai, Hiroki
AU - Asai, Keisuke
PY - 2007
Y1 - 2007
N2 - 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.
AB - 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.
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U2 - 10.2514/6.2007-124
DO - 10.2514/6.2007-124
M3 - Conference contribution
AN - SCOPUS:34250893923
SN - 1563478900
SN - 9781563478901
T3 - Collection of Technical Papers - 45th AIAA Aerospace Sciences Meeting
SP - 1401
EP - 1412
BT - Collection of Technical Papers - 45th AIAA Aerospace Sciences Meetin
PB - American Institute of Aeronautics and Astronautics Inc.
T2 - 45th AIAA Aerospace Sciences Meeting 2007
Y2 - 8 January 2007 through 11 January 2007
ER -