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http://dx.doi.org/10.5407/jksv.2020.18.3.069

An experimental study on the flow separation characteristics of a paraglider canopy  

Shin, Jeonghan (Department of Mechanical Engineering, Ulsan National Institute of Science and Technology)
Chae, Seokbong (Department of Mechanical Engineering, Ulsan National Institute of Science and Technology)
Shin, Yisu (Department of Mechanical Engineering, Ulsan National Institute of Science and Technology)
Kim, Jooha (Department of Mechanical Engineering, Ulsan National Institute of Science and Technology)
Publication Information
Journal of the Korean Society of Visualization / v.18, no.3, 2020 , pp. 69-76 More about this Journal
Abstract
In the present study, we investigate the flow separation characteristics of a paraglider canopy model by tuft visualization. The experiment is conducted at Re = 3.3×105 in a wind tunnel large enough to contain the three-dimensional paraglider canopy model, where Re is Reynolds number based on the mean chord length and the free-stream velocity. The flow separation characteristics of the canopy model near the wing root are similar to those of a two-dimensional airfoil with a cross-section similar to the model. On the other hand, near the wingtip region, the flow separation is suppressed by the downwash induced by the wingtip vortex. As a result, as the angle of attack increases, the flow separation occurs from the wing root region of the canopy model and develops toward the wingtip.
Keywords
Paraglider; Canopy; Flow separation; Tuft visualization;
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