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Unsteady aerodynamic behavior of an airfoil with and without a slatUnsteady flow behavior and load characteristics of a 2D VR-7 airfoil with and without a leading-edge slat were studied in the water tunnel of the Aeroflightdynamics Directorate, NASA Ames Research Center. Both airfoils were oscillated sinusoidally between 5 and 25 deg at Re = 200,000 to obtain the unsteady lift, drag, and pitching moment data. A fluorescent 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 flowfield 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
Document Type
Reprint (Version printed in journal)
Tung, Chee (NASA Ames Research Center Moffett Field, CA, United States)
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, 1993
Publication Information
Publication: Computers & Fluids
Volume: 22
Issue: 4-5
ISSN: 0045-7930
Subject Category
Distribution Limits