Accession Number:

AD0767234

Title:

Vortex Shedding from the Ram Wing Vehicle.

Descriptive Note:

Technical progress rept. Jan-Jul 73,

Corporate Author:

AIR FORCE ACADEMY COLO DEPT OF AERONAUTICS

Personal Author(s):

Report Date:

1973-08-01

Pagination or Media Count:

36.0

Abstract:

Extensive flow visualization of the ram wing surface effect vehicle wake reveals the predominate feature to be a strong vortex sheet shed laterally from the lower side plate edge. This sheet quickly rolls up into a concentrated vortex which continues to move outward parallel to the surface. Neutrally buoyant helium filled bubbles are used for flow visualization supplemented by common techniques. A simple flow model, applicable to low aspect ratio ram wings with side plates, corroborates the major features of observed near wake geometry and conventional force and pressure coefficient data. Minor modifications to the geometry of the side plates are shown to cause large increases in pressure on the bottoms of the side plates. Author

Subject Categories:

  • Aerodynamics
  • Surface Effect Vehicles and Amphibious Vehicles

Distribution Statement:

APPROVED FOR PUBLIC RELEASE