Abstract
For urban usage of an Archimedes spiral horizontal axis wind turbine, the effect of wind direction was examined for the confront measurement planes from 0° to 15°. Aerodynamic characteristics in the near wake of wind turbine blade were investigated using the particle image velocimetry method. Ensemble and phase-averaged velocity fields were obtained in both front and lee sides of the blade with various angles of attack. The streamlines are parallel with the incoming flow for the range of attack angles; however, wake velocity is decreasing with increasing angle of attack. It has been found that the trajectory of tip vortices varies significantly in the front side plane compared to that of lee side plane when the angle of attack is higher than 10°. Distance between two consecutive vortices in the front plane decreases monotonically with increasing attack angle, while that in the lee side shows an opporsite manner.
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Acknowledgments
This study was supported by New and Renewable Energy Program (No. 20134030200290) of Korea Institute of Energy Technology Evaluation and Planning (KETEP) and INNOPOLIS Foundation of Korea Ministry of Science, ICT and Future Planning (No.B2013DD0031). This study was partially supported by Leading Foreign Research Institute Recruitment Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (MSTIP) (NRF-2009-00495).
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Ji, H.S., Qiang, L., Beak, J.H. et al. Effect of the wind direction on the near wake structures of an Archimedes spiral wind turbine blade. J Vis 19, 653–665 (2016). https://doi.org/10.1007/s12650-016-0356-8
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DOI: https://doi.org/10.1007/s12650-016-0356-8