@article{oai:jaxa.repo.nii.ac.jp:00021653,
 author = {山口, 真伍 and 河内, 俊憲 and 小池, 俊輔 and 中島, 努 and 佐藤, 衛 and 神田, 宏 and 柳瀬, 眞一郎 and Yamaguchi, Shingo and Kouchi, Toshinori and Koike, Shunsuke and Nakajima, Tsutomu and Sato, Mamoru and Kanda, Hiroshi and Yanase, Shinichiro},
 issue = {4},
 journal = {日本航空宇宙学会論文集, Journal of the Japan Society for Aeronautical and Space Sciences},
 month = {Aug},
 note = {We visualized two-dimensional wing buffet using fast-framing focusing schlieren method. A supercritical airfoil of NASA SC(2)-0518 was used in this study. Mach number of the freestream was 0.7, and Reynolds number based on the wing code (c) was 5×10(exp 6). Angle of attack without corrections (α) was changed from 4 deg to 6 deg. The present focusing schlieren system had plus or minus 18mm depth of field, which was narrow than spanwise region where the two-dimensionality of the flow field was maintained. 8,345 successive images were captured by high speed CMOS camera with 7,000 frames per second with 20μs exposure time. The present imaging system well captured the shock wave motion on the airfoil. At α = 4 deg, the shock wave was positioned at x/c approximately 0.45. The shock wave was slightly fluctuated with a frequency of 585.5Hz. Above α = 5 deg, the wing buffet occurred. The buffet frequency increased as increasing α. The focusing schlieren movies revealed that the shock wave was bifurcated on the wing surface, as the shock traveling upstream. The boundary layer largely separated from the leading oblique foot of the bifurcated shock wave, whereas, the bifurcated shock wave changed into a normal shock and the flow separation disappeared, as the shock traveling downstream. For both cases, many pressure waves propagated from the downstream of the shock wave to the upstream. These waves merged with the shock wave, and seem to drive the shock oscillation., 形態: 図版あり, Physical characteristics: Original contains illustrations, 資料番号: DS1540214007},
 pages = {166(48)--174(56)},
 title = {高速断層シュリーレンによる二次元翼バフェットの可視化},
 volume = {63},
 year = {2015}
}