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Dynamic stall study of a multi-element airfoilUnsteady flow behavior and load characteristics of a VR-7 airfoil with and without a slat were studied in the water tunnel of the Aeroflightdynamics Directorate, NASA Ames Research Center. Both airfoils were oscillated sinusoidally between 5 and 25 degrees at a Reynolds number of 200,000 to obtain the unsteady lift, drag and pitching moment data. A fluorescing dye was released from an orifice located at the leading edge of the airfoil for the purpose of visualizing the boundary layer and wake flow. The flow field and load predictions of an incompressible Navier-Stokes code based on a velocity-vorticity formulation were compared with the test data. The test and predictions both confirm that the slatted VR-7 airfoil delays both static and dynamic stall as compared to the VR-7 airfoil alone.
Document ID
19940035417
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Tung, Chee
Mcalister, Kenneth W.
(U.S. Army, Aeroflightdynamics Directorate; NASA, Ames Research Center Moffett Field, CA, United States)
Wang, Clin M.
(Georgia Inst. of Technology Atlanta, United States)
Date Acquired
August 16, 2013
Publication Date
September 1, 1992
Subject Category
Aerodynamics
Accession Number
94A12072
Distribution Limits
Public
Copyright
Other

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