@techreport{oai:jaxa.repo.nii.ac.jp:00045194,
 author = {西脇, 英夫 and 武田, 克巳 and NISHIWAKI, Hideo and TAKEDA, Katsumi},
 month = {Jun},
 note = {Three configurations of six-bladed, 400-mm-diam, scale-model advanced propellers such as backward-, forward-, and back-forward alternately installed swept blades were tested in anechoic environments with an incoming main flow velocity up to 68 m/s. Under no incoming-flow conditions, the blade separated flow was also discussed from on academic point of view. The data for the advance ratio of 0.43-1.15 were obtained in the aeroacoustic aspects. The altermately swept blades arrangement showed the best performance in spanwise load distribution among the three configurations. The forward-swept blades did not exhibit any aeroacoustic advantage. The altermately swept configuration as a tandem rotation has the potential for decreasing the sound levels at the blade passage frequencies by the dispersion of sound with no sacrifice of aerodynamic performance and no additional mechanical complexity., 資料番号: NALTR0935000, レポート番号: NAL TR-935},
 title = {Aerodynamic and Acoustic Characteristics of an Advanced Propeller under Take-off and Landing Conditions},
 year = {1987}
}