Rotor‐Wake‐Induced Flow Separation on a Lifting Surface
Rotor wake vortex interaction causes flow separation on the upper surface of a lifting surface at low angles of attack, where the time‐averaged flow would be expected to remain fully attached. This phenomenon is studied using a full‐scale UH‐1 stabilator and a two
bladed teetering rotor in a wind tunnel. A large once‐per‐rev pressure fluctuation is observed. Strong time‐averaged spanwise flow is observed downstream of the unsteady separation line. The vortex interaction effect decreases with increasing advance ratio. These results
are insensitive to small perturbations of the flowfield caused by movement of a small lifting surface upstream.
Document Type: Research Article
Affiliations: School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0150
Publication date: 01 April 1995
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