Date of Award
Mechanical, Automotive, and Materials Engineering
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Delta winglet is an effective means to passively augment heat convection from a hot surface such as a solar panel. The effects of an inclination angle on the flow downstream of the winglet were studied. A delta winglet with an aspect ratio (c/h) of 2 and an attack angle of 30 degrees was mounted on a flat plate to scrutinize the role of its inclination angle (90° and 120°) on the flow downstream. The inclined winglet was placed in a wind tunnel, and the flow was measured by the hotwire. The experiment shows the 120-degree-inclination-angle delta winglet can generate an inflow velocity larger than 90 degrees. The heat transfer enhancement caused by the delta winglet was then investigated. Three different inclination angles (60°, 90° and 120°) of the delta winglet were studied, and a thermal camera was used to maintain the heat transfer enhancement of the heated panel. The result shows that the delta winglet with the inclination angle of 120 degrees can generate the best thermal performance.
Wang, Junguo, "Vortex Induced Convective Heat Transfer Augmentation" (2019). Electronic Theses and Dissertations. 7669.