A Computational Simulation Study of Fluid Mechanics of Low-Speed Wind Tunnel Contractions
AbstractIn this work, the fluid mechanics performance of four different contraction wall shapes has been studied and compared side-by-side by computational simulation, and the effect of contraction cross-sectional shape on the flow uniformity at the contraction exit has been included as well. A different contraction wall shape could result in up to an extra 4% pressure drop of a closed-loop wind tunnel, and the contraction wall shape has a stronger influence on the pressure loss than the contraction cross-sectional shape. The first and the second derivatives from different wall shape equations could provide a hint for qualitatively comparing the flow uniformity at the contraction exits. A wind tunnel contraction with an octagonal shape provides not only better fluid mechanics performance than that with a circular or a square cross-sectional shape, but also lower manufacturing costs. Moreover, a smaller blockage ratio within the test section can be achieved by employing an octagonal cross-sectional shape instead of a circular cross-sectional shape under the same hydraulic diameter circumstance. A wind tunnel contraction with an octagonal cross-sectional shape is recommended to be a design candidate. View Full-Text
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Kao, Y.-H.; Jiang, Z.-W.; Fang, S.-C. A Computational Simulation Study of Fluid Mechanics of Low-Speed Wind Tunnel Contractions. Fluids 2017, 2, 23.
Kao Y-H, Jiang Z-W, Fang S-C. A Computational Simulation Study of Fluid Mechanics of Low-Speed Wind Tunnel Contractions. Fluids. 2017; 2(2):23.Chicago/Turabian Style
Kao, Yi-Huan; Jiang, Zhou-Wei; Fang, Sheng-Cyuan. 2017. "A Computational Simulation Study of Fluid Mechanics of Low-Speed Wind Tunnel Contractions." Fluids 2, no. 2: 23.
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