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- W2324370919 abstract "The objective of this investigation was to study how membrane scalloping and the onset of vibration affect the aerodynamic efficiency of flat, membrane wings at low Reynolds numbers (Re = 10,000 to 61,000) and moderate-to-high membrane extensibility (Π < 18). While the removal of trailing-edge material was expected to reduce drag by decreasing trailing-edge vibration, the subsequent effects on lift and lift-to-drag ratio were not known. A series of flat plates with moderate aspect ratio and repeating batten-reinforced, membrane cell structure were studied and compared to a solid flat plate and a solid scalloped plate. Centerline wake profiles, wake spectral characteristics and the onset of membrane vibration were measured using hot-wire anemometry; membrane vibration amplitude was measured using a laser vibrometer. Lift and drag measurements were acquired using an external force-balance. Results showed that the size and aspect ratio of the latex cell had a greater impact on lift than the amount of scalloping and that the amount of scalloping had a greater affect on drag than the cell shape. Compared to the solid plates, the membrane plates exhibited higher lift and drag coefficients. Trailing-edge scalloping decreased both the lift and drag coefficients relative to no scalloping, with a greater relative effect on drag. The maximum lift-todrag ratio was attained for a 25% scallop with a square repeating cell geometry sized at 80% of the wing chord. These results indicate that the membrane scalloping can lead to more efficient wings." @default.
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- W2324370919 date "2010-01-04" @default.
- W2324370919 modified "2023-09-27" @default.
- W2324370919 title "A Study of Trailing-Edge Scalloping on Flat-Plate Membrane Wing Performance" @default.
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- W2324370919 doi "https://doi.org/10.2514/6.2010-70" @default.
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