@inproceedings{oai:jaxa.repo.nii.ac.jp:00004921,
 author = {稲田, 喜信 and 前田, 将輝 and 森山, 貴司 and 青野, 光 and 劉, 浩 and 青山, 剛史 and Inada, Yoshinobu and Maeda, Masateru and Moriyama, Takashi and Aono, Hikaru and Liu, Hao and Aoyama, Takashi},
 book = {宇宙航空研究開発機構特別資料: 第41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2009論文集, JAXA Special Publication: Proceedings fo 41st Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2009},
 month = {Feb},
 note = {平成21年6月18-19日. 宇宙航空研究開発機構調布航空宇宙センター, 18 June-19 June, 2009, Japan Aerospace Exploration Agency, Flapping motion consists of combined motions of wing reciprocation and rotation, and thus generates complex flow field and pressure change around the wing, which produce typical sound sources such as dipole or quadrupole sources. This implies the control of flapping sound is an important issue to realize practical flapping wing air vehicles. For this purpose, we developed a numerical scheme to analyze sound generation and transmission of flapping wing by combining CFD and acoustic analyses. This scheme is applied to two types of motions, i.e. hovering and forward moving motion of insect (hawkmoth). Conspicuous similarity is found in both flying types, i.e. the dominance of fundamental frequency wave in front and the second or higher harmonic wave in side or bottom. Another similarity is found in the sound directivity, i.e. the strong sound transmission in the direction perpendicular to the flapping plane and the weak transmission in the direction parallel to the flapping plane. These results clearly represent the relationship between wing motion and sound characteristics, and thus providing us with insights on the control methods of flapping sound., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA0064672023, レポート番号: JAXA-SP-09-011},
 publisher = {宇宙航空研究開発機構, Japan Aerospace Exploration Agency (JAXA)},
 title = {飛行モードによる羽ばたき音の特性の違いについて},
 volume = {JAXA-SP-09-011},
 year = {2010}
}