Primary and Secondary Vortex Structures Over Accelerated-Decelerated Airfoils At High Angles of Attack
An experimental study is conducted to investigate the vortex developments over high angles of attack flat plate airfoils in an accelerated-decelerated flow. To preform the required experiments, a new experimental system was developed and incorporated into an open return subsonic wind tunnel. The system was employed to visualize the details of vortex structures and processes over and downstream of the airfoils for an angle of attack range between 30Â° and 90Â°. While flow acceleration encouraged flow separation and vortex convection, flow deceleration delayed the convection of the primary vortex structures as well as the reverse flow reattachment and shredding. The details provided in the article may help in developing control possibilities of vortical flow over vehicles or structures subjected to accelerating-decelerating motions. Further, the study presents guidelines to develop unsteady flow experimental arrangements suitable for incorporation into steady flow subsonic wind tunnels.
F. Finaish and J. Frigerio, "Primary and Secondary Vortex Structures Over Accelerated-Decelerated Airfoils At High Angles of Attack," SAE Technical Papers, Society of Automotive Engineers, Jan 1993.
The definitive version is available at http://dx.doi.org/10.4271/931368
1993 SAE Aerospace Atlantic Conference and Exposition
Mechanical and Aerospace Engineering
Keywords and Phrases
Experimental Arrangement; Experimental Studies; Experimental System; Flat Plate; Flow Acceletration; High Angles of Attack; Open Return; Primary Vortex; Reverse Flow; Secondary Vortex; Subsonic Wind Tunnels; Vortex Convection; Vortex Structures; Vortical Flows
Article - Conference proceedings
© 1993 Society of Automotive Engineers, All rights reserved.