@article{oai:miyazaki-u.repo.nii.ac.jp:00002970, author = {小園, 茂平 and Ozono, Shigehira and 和田, 一洋 and Wada, Kazuhiro and 和田, 一洋 and Wada, Kazuhiro}, journal = {宮崎大学工学部紀要, Memoirs of Faculty of Engineering, University of Miyazaki}, month = {Oct}, note = {This paper describes the lock-in of the vortex shedding from a rectangular cylinder in sinusoidal pulsating flow. The side ratios d/h of the models used for measurements are varied over the range 0.6-2.5. Here, d is the depth and h is the height of the cylinder. Sinusoidal pulsating flow is created using a wind tunnel of multi-fun type, where the forced frequency is varied from 0 to 4.6Hz. Dimensionless amplitude ratio ε is set to 0.05, where ε=ΔU/(2πfd) and the pulsating component is expressed by ΔU sin2πft. The vortex shedding frequency tends to the line f=2fs, and eventually coincides with that line, meaning that lock-in commences somewhat prior to f/fso=2, where f is the frequency of pulsating flow, fs the vortex shedding frequency, and fso the natural vortex shedding frequency. For this range, the base pressure decreases significantly.}, pages = {23--28}, title = {正弦的脈動流を受ける角柱放出渦のLock-in}, volume = {33}, year = {2004}, yomi = {オゾノ, シゲヒラ and ワダ, カズヒロ and ワダ, カズヒロ} }