Unsteady Flow Separation and Attachment Induced by Pitching Airfoils
Abstract
The dynamics of induced, separated vortices generated from sinusoidal airfoil oscillations were examined across a range of unsteady flow parameters. Leading edge vortical initiation, development, and interaction with trailing edge vorticity were summarized via stroboscopic flow visualization and hotwire anemometry. Results indicate the sensitivity of vortical development at both leading and trailing edges to reduced frequency parameter and magnitude of oscillation angle. Certain optimal parametric conditions resulted in dramatic interactions of leading and trailing edge vorticity. At diminished oscillation angles, separated flow attachment was evident in the absence of the large induced vortical structures characteristic of large oscillation amplitudes. (sdw)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 13, 1983
- Accession Number
- ADA217785
Entities
People
- Marvin W. Luttges
- Michael C. Robinson
Organizations
- University of Colorado Boulder