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An experimental study of pressures on 60 deg Delta wings with leading edge vortex flaps (1983)

Donatelli, D. A. ; Terry, J. E. ; Marchman, J. F., III

In: CASI

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Publication Date: 2019-06-28

Description: An experimental study was conducted in the Virginia Tech Stability Wind Tunnel to determine surface pressures over a 60 deg sweep delta wing with three vortex flap designs. Extensive pressure data was collected to provide a base data set for comparison with computational design codes and to allow a better understanding of the flow over vortex flaps. The results indicated that vortex flaps can be designed which will contain the leading edge vortex with no spillage onto the wing upper surface. However, the tests also showed that flaps designed without accounting for flap thickness will not be optimum and the result can be oversized flaps, early flap vortex reattachment and a second separation and vortex at the wing/flap hinge line.

Keywords: AERODYNAMICS

Type: NASA-CR-172833 , NAS 1.26:172833

Format: application/pdf

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