@inproceedings{oai:jaxa.repo.nii.ac.jp:00006160,
 author = {青山, 剛史 and Yang, Choongmo and 齊藤, 茂 and Aoyama, Takashi and Yang, Choongmo and Saito, Shigeru},
 book = {宇宙航空研究開発機構特別資料: 航空宇宙数値シミュレーション技術シンポジウム2005論文集, JAXA Special Publication: Proceedings of Aerospace Numerical Simulation Symposium 2005},
 month = {Feb},
 note = {A three-dimensional unsteady Euler code for the analysis of active flap control (AFC) has been developed in this study based on an advanced CFD code for the full configuration of helicopters. The effect of phase angle of AFC on blade-vortex interaction (BVI) noise is analyzed by combining the new CFD code with an acoustic code based on the Ffowcs Williams and Hawkings (FW-H) equation. As a result, a simple model is proposed to understand the effect of flap phase angle on BVI noise and 3D calculations by the present method confirm that the model properly works. The prediction of the effect of flap phase angle by the present method is remarkably improved by applying the understandings derived from the simple model. A quantitative noise reduction of 5.62 dB is obtained at the flap phase angle of 60 deg and noise signal strongly propagates almost downward in a condition of one-bladed rotor., 資料番号: AA0049212027, レポート番号: JAXA-SP-05-017},
 pages = {162--167},
 publisher = {宇宙航空研究開発機構, Japan Aerospace Exploration Agency (JAXA)},
 title = {ヘリコプタの騒音を低減するアクティブ・フラップの数値解析},
 volume = {JAXA-SP-05-017},
 year = {2006}
}