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タイトル: | Investigation of aerodynamic effects of rotation on 6-DOF motion of flat square plate based on free flight experiments |
著者: | Wen, Lizhi Nishijima, Kazuyoshi |
著者名の別形: | 西嶋, 一欽 |
キーワード: | Aerodynamics Square plates 6-Degree-of-freedom Three-dimensional motion Windborne debris |
発行日: | Feb-2024 |
出版者: | Elsevier BV |
誌名: | Journal of Wind Engineering and Industrial Aerodynamics |
巻: | 245 |
論文番号: | 105629 |
抄録: | Plate-like debris is common windborne debris in windstorms. Although the 3-degree-of-freedom (3-DOF) motion (two translational DOFs and one rotational DOF) of flat plates has been widely investigated in previous studies, the 6-DOF motion is more likely to occur in real storms. We investigate the 6-DOF motion by performing free flight experiments of a square plate with different initial orientations under uniforms flow in a wind tunnel. Two cameras are used to record the flight motion of the plate. Then the recordings are processed in an image analysis software to estimate the kinematics of the plate. We first investigate the characteristics of the rotational motion. According to the rotational characteristics, the plate trajectories are categorized into four flight patterns: flutter, tumbling, transition, and quasi-translation. Then we explore the rotational effects on the aerodynamics. We propose a hypothesis that the magnitude and direction of the rotational forces depend on the angular velocity and the relative wind velocity. We also propose a hypothesis that the rotational moment has negligible influences on the direction of the instantaneous moment. These hypotheses are supported by the experimental results. These verified hypotheses may be helpful for modelling the aerodynamics of the 6-DOF motion of flat plates. |
著作権等: | © 2023. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/ The full-text file will be made open to the public on 1 February 2026 in accordance with publisher's 'Terms and Conditions for Self-Archiving' This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 |
URI: | http://hdl.handle.net/2433/287509 |
DOI(出版社版): | 10.1016/j.jweia.2023.105629 |
出現コレクション: | 学術雑誌掲載論文等 |
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