Vortex System Evolution in 2- and 3-D Swept Trailing Edge Flows
Abstract
Instability wavefront orientation and vortex system interaction were studied in a swept-trailing-edge mixing layer and in a slanted nozzle jet flowfield at low subsonic velocities. Flow visualization and image processing, and hot-wire data comprised the main body of experimental observations. The response of full-span wave systems of swept and unswept orientation were documented as a function of acoustic excitation introduced through a thin slot at the trailing edge. The lateral spreading of a wave system with only partial- span excitation was shown to be asymmetrical in a swept mixing layer. The jet flowfield was studied using a simultaneous axial and transverse laser sheet illumination. Excitation frequency-and amplitude-dependence of instability wave system orientation was characterized. Digitized flow visualization images were decomposed to show the axial and helical shear layer modes.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 24, 1990
- Accession Number
- ADA232692
Entities
People
- David E. Parekh
- Frederick W. Roos
- Jerome T. Kegelman
- Richard W. Wlezien
- Valdis Kibens