@inproceedings{oai:jaxa.repo.nii.ac.jp:00005628, author = {稲田, 喜信 and 青山, 剛史 and 青野, 光 and Liu, Hao and Inada, Yoshinobu and Aoyama, Takashi and Aono, Hikaru and Liu, Hao}, book = {宇宙航空研究開発機構特別資料: 第39回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2007論文集, JAXA Special Publication: Proceedings of 39th Fluid Dynamics Conference/Aerospace Numerical Simulation Symposium 2007}, month = {Feb}, note = {Aerodynamics around unsteady flapping wings is analyzed by using CFD (Computational Fluid Dynamics) techniques. Two types of flapping wing are modeled and analyzed referring to the hovering motion of hawkmoth and honeybee. Multi-block technique is used to make the suitable calculation grids for wing and body, and the grid-overset technique is used for the interpolation of physical values between those grids. CFD results show several vortices are generated at the leading edge, tip, and the trailing edge of flapping wings which comprise the complex flow fields around the wings and a body. The analysis also clarified the leading edge vortex significantly contributes to the generation of lift. Subsequent acoustic analysis is conducted referring to the CFD results to simulate flapping sound of honeybee. Directivity of sound propagation is recognized showing strong sound propagation in the front direction. Consequently, many features of complex flow around the flapping wing and its sound generation are clarified both qualitatively and quantitatively by using CFD and acoustic techniques., 資料番号: AA0063742022, レポート番号: JAXA-SP-07-016}, pages = {137--142}, publisher = {宇宙航空研究開発機構, Japan Aerospace Exploration Agency (JAXA)}, title = {非定常羽ばたき翼周りの流れの数値計算}, volume = {JAXA-SP-07-016}, year = {2008} }