@inproceedings{oai:jaxa.repo.nii.ac.jp:00004129,
 author = {原, 豊 and 鈴木, 貴博 and 掃部, 裕文 and Hara, Yutaka and Suzuki, Takahiro and Kamon, Hirofumi},
 book = {宇宙航空研究開発機構特別資料, JAXA Special Publication},
 month = {Nov},
 note = {5th Symposium on Integrating CFD and Experiments in Aerodynamics (October 3-5, 2012, Chofu Aerospace Center, Japan Aerospace Exploration Agency (JAXA)), Chofu, Tokyo, Japan, To determine the three-dimensional flow field around vertical axis wind turbines (VAWTs), an ultrasonic anemometer was used to measure the three components of flow velocity in the wake of a small VAWT (4-blade rotor; airfoil: NACA 0012; rotor diameter: 0.6 m; blade length: 0.47 m; chord length: 0.075 m). Counterflow in the direction of the mainstream was observed even in the averaged wake-flow field. For a more detailed investigation of the counterflow regions, the three-dimensional flow field was reconstructed through computation from the velocity data obtained at each measurement point and was analyzed by means of velocity vector maps, vorticity distributions, and path lines. A clear swirl pattern in two-dimensional path lines was observed near the counterflow region on the equatorial plane in the wake; however, the vorticity of the swirl pattern part was weak., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA0062070021, レポート番号: JAXA-SP-13-001E},
 pages = {263--270},
 publisher = {宇宙航空研究開発機構(JAXA), Japan Aerospace Exploration Agency (JAXA)},
 title = {Measurements of Counter Flow Region in Averaged Wake-Velocity-Field of a Small Straight-Bladed Vertical Axis Wind Turbine},
 volume = {JAXA-SP-13-001E},
 year = {2013}
}