Accession Number:

ADP000532

Title:

Turbulence Measurements in an Ejector Wing Flow Field

Descriptive Note:

Corporate Author:

LOUISIANA STATE UNIV BATON ROUGE

Report Date:

1982-06-01

Pagination or Media Count:

32.0

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 wings upper surface. The influence is felt upstream of the models 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 wings upper surface are compressed downwards toward the airfoil indicating a reduction in the turbulence and, hence, the wake region.

Subject Categories:

  • Rocket Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE