School of Engineering Department of Mechanical and Aerospace Engineering 166 Active Support to Experimental Studies for Research in Aero-acoustics Supervisor: REDONNET Stephane / MAE Student: KIM Subin / AE Course: UROP 1000, Summer In regard to the mitigation of wingtip vortices, this UROP project experimentally characterize the aerodynamics and acoustics of a spiroid winglet, comparing them to those of a traditional, round wingtip. This was achieved through small-scale experiments involving a NACA0012 airfoil of aspect ratio 2, whose sharp edge was interchangeably added the spiroid winglet or the round wingtip. The tests were conducted within HKUST’s small-scale, closed-vein aerodynamic wind tunnel, which allowed performing simultaneously aerodynamic and acoustic measurements. These aero-acoustic tests were achieved for various flow speeds (chord-based Reynolds number up to 1.6×105) and incidence (angle-of-attack up to ±20°). The study and its findings were documented through a research paper that was presented at the 2024 Student Conference by the American Institute of Aeronautics and Astronautics (AIAA), which is the world's largest aerospace technical society. Figure. Experimental characterization of the aero-acoustics of a NACA0012 airfoil equipped with either a round wingtip (left/top) or a spiroid winglet (left/bottom and center). Corresponding tip vortices, as visualized using a tuft grid (right/top and right /bottom, respectively).
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