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- W2314463513 abstract "Detailed flow measurements were performed with a five-hole probe in the flap side-edge region of a wing with a half-span flap. The experiments were conducted in the NASA-Langley Quiet Flow Facility as a part of an extensive experimental and computational investigation of airframe-related noise sources. Basic flow properties were verified using static pressure taps, pressure-sensitive paint, and oil-flow visualization. Detailed five-hole probe surveys were conducted in a set of planes at ten streamwise stations for flap deflections of 29 and 39 degrees. These measurements show the development of a two-vortex system at the flap side edge. The vortex path and strength are determined, and the process of vortex merging is documented in detail in the mid-chord region. At the higher flap deflection angle, vortex bursting is observed, which may be a factor in the observed higher noise levels for this condition. Results are compared with Reynolds-averaged NavierStokes calculations of a similar configuration (AIAA Paper 98-0768). These measurements and calculations form the basis for instability modeling and unsteady calculations which will ultimately lead to an understanding of flap side-edge noise sources." @default.
- W2314463513 created "2016-06-24" @default.
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- W2314463513 date "1998-01-12" @default.
- W2314463513 modified "2023-09-27" @default.
- W2314463513 title "Detailed measurements of a flap side-edge flow field" @default.
- W2314463513 cites W1987117624 @default.
- W2314463513 doi "https://doi.org/10.2514/6.1998-700" @default.
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