@inproceedings{oai:jaxa.repo.nii.ac.jp:00006566, author = {藤井, 啓介 and Fujii, Keisuke}, book = {宇宙航空研究開発機構特別資料: 境界層遷移の解明と制御研究会講演論文集 第33回・第34回, JAXA Special Publication: Proceedings of the 33rd and 34th JAXA Workshops on Investigation and Control of Boundary-Layer Transition}, month = {Jan}, note = {An experimental investigation for an efficient tripping method of the hypersonic boundary layer is conducted with a 5 deg half angle sharp cone in ISTA/JAXA phi0.5 m hypersonic wind tunnel. Aerodynamic heating distributions and fluctuations of wall pressure are measured both with and without roughness elements. A set of transition data and wall pressure fluctuation measurements in the wind tunnel are obtained. A two-dimensional wavy roughness of a wave length approximately as two times much as the estimated boundary layer thickness doesn't show any effects on the location of the boundary layer transition, while in the case where the boundary layer thickness is approximately 1.25 times of the half wavelength, a clear delay in transition is observed. Effects of conventional three dimensional roughness elements on tripping effectiveness are also examined., 資料番号: AA0047776012, レポート番号: JAXA-SP-04-002}, pages = {35--38}, publisher = {宇宙航空研究開発機構, Japan Aerospace Exploration Agency (JAXA)}, title = {極超音速境界層に与える2次元ラフネスの効果に関する実験}, volume = {JAXA-SP-04-002}, year = {2005} }