Turbulence Measurements in an Ejector Wing Flow Field
Abstract
An experimental investigation of the resultant turbulent flow field about an ejector wing design incorporating a constant area mixing duct is made. Mean velocities and turbulent intensities are calculated from the photon correlation functions. Comparison between the ejector powered and non-powered cases are made. Qualitative information as well is obtained from a flow visualization technique. The following results are obtained. (1) The ejector consistently accelerated the flow field above the wing's upper surface. The influence is felt upstream of the model's leading edge. (2) The stagnation point moved further downstream along the lower surface for the ejector powered case, indicating an apparent increase in the effective angle of attack. (3) The turbulent intensities in the confining duct are more indicative of free or coaxial jet turbulence level. (4) The streamlines above the wing's upper surface are compressed downwards toward the airfoil indicating a reduction in the turbulence and, hence, the wake region.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1982
- Accession Number
- ADP000532
Entities
People
- D. Stevens
- G. D. Catalano
- H. E. Wright
- K. S. Nagaraja
Organizations
- Louisiana State University