Real Time Development of the Wake of a Finite Wing.
Abstract
A real time, three-dimensional method is presented to monitor the development of the wake generated by a finite wing, which suddenly begins to produce lift in an irrotational, incompressible fluid. The wake is represented by equal strength vortex filaments which are bounded by a lifting line at the wing position and a starting vortex which washes downstream with the free stream velocity. The geometric angle of attack of the wing was changed with time so that only one starting vortex was shed and the circulation of the bound vortex remains constant. The computational time was significantly reduced by neglecting the component of induced velocity in the free-stream direction. The Biot-Savart law was needed to calculate the wake deformation of an Army O-1 aircraft, for which experimental results have been reported by B. W. McCormick. Experimental and theoretical values for circulation at contours in the wake showed agreement although the experimental results, which consisted of contours of constant vorticity, were limited to a region near the wing tips and within a chord length of the wing trailing edge. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1974
- Accession Number
- ADA020644
Entities
People
- James D. Wilson
- John L. Loth
Organizations
- West Virginia University