@inproceedings{oai:jaxa.repo.nii.ac.jp:00038212, author = {高木, 正平 and 西沢, 啓 and 徳川, 直子 and 側垣, 正 and 今井, 喬弘 and Takagi, Shohei and Nishizawa, Akira and Tokugawa, Naoko and Sobagaki, Tadashi and Imai, Takahiro}, book = {航空宇宙技術研究所特別資料: 境界層遷移の解明と制御研究会講演論文集 第29回・第30回, Special Publication of National Aerospace Laboratory: Proceedings of the 29th and 30th NAL Workshops on Investigation and Control of Boundary-Layer Transition}, month = {Dec}, note = {Re-transition mechanism of a laminarized boundary layer on the convex wall of a wind-tunnel contraction was experimentally investigated. Experiments were conducted under the condition that a turbulent boundary layer was formed in the concave region and then it was laminarized due to the strong acceleration on the convex wall following the concave region. The onset of the re-transition locates upstream of the outlet region where the adverse pressure gradient exists. Detailed measurements using a hot-wire sensor show a definite evidence that prior to appearance of the turbulent spots in the re-transition process the laminar velocity profile has an inflection point. The turbulence intensity of about 3 percent in this unstable boundary layer seems to trigger the rapid re-transition even under the favorable pressure gradient., 資料番号: AA0045947021, レポート番号: NAL SP-56}, pages = {69--70}, publisher = {航空宇宙技術研究所, National Aerospace Laboratory (NAL)}, title = {縮流胴壁に沿う境界層の振舞}, volume = {56}, year = {2002} }