Accession Number : AD0754755

Title :   The Effect of Base Bleed on the Drag and Magnus Characteristics of a Rotating Body of Revolution,

Corporate Author : NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s) : Regan,Frank J. ; Schermerhorn,Virginia L.

Report Date : 22 AUG 1972

Pagination or Media Count : 98

Abstract : Base bleed is a technique whereby all or part of the boundary layer is 'bled' from the rear portion of a projectile to the base region. Passage from the model's surface to the base region is by means of concentric cylindrical passageways. The purpose of base bleed is to reduce the Magnus moment on overlong spinning bodies of revolution and to reduce the base drag. Both analytic and experimental results are presented. The boundary layer is represented by means of the momentum thickness.

Descriptors :   (*BODIES OF REVOLUTION, *BOUNDARY LAYER CONTROL), (*PROJECTILES, *DRAG), REDUCTION, STABILIZATION, ROTATION, MOMENTUM, FORCE(MECHANICS), MAGNUS EFFECT, BASE FLOW, MATHEMATICAL MODELS, WIND TUNNEL MODELS, ANGLE OF ATTACK, CURVE FITTING

Subject Categories : Ammunition and Explosives
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE