Accession Number:

AD0739205

Title:

Influence of Mixing of a Jet with the Surrounding Air upon a Profile with a Jet Flap,

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

Report Date:

1971-12-07

Pagination or Media Count:

14.0

Abstract:

The article concerns the influence that the mixing of a jet with the ambient air has on the flow around an aerofoil with a jet flap. The problem is solved on the basis of the theory of thin aerofoils and the mixing of the jet with the ambient air is replaced by the equivalent distribution of sinks on the projection of the jet axis on to the x axis. The change of the circulation around the aerofoil caused by the sinks is very small. From experiments it is known that mixing influences the velocity distribution around the aerofoil. It is shown that this mixing causes a change of the sum of velocities above and below the aerofoil. If we use the linearized theory then this change does not depend on the shape of the aerofoil and depends only on the jet momentum coefficient. The real aerofoil with a jet flap is equivalent to a thicker aerofoil the flow around which is not influenced by the mixing of the jet with the ambient air. Author

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE