Accession Number : ADP005902

Title :   A Comparative Study of Vortex Flows in Wind and Water Tunnels,

Corporate Author : BRITISH AEROSPACE BRISTOL (UNITED KINGDOM) NAVAL AND ELECTRONICS DIV

Personal Author(s) : Davies, A. G.

Report Date : JUN 1987

Pagination or Media Count : 16

Abstract : Characteristics of the flowfield around a generalised missile configuration using two flow visualisation techniques in a water tunnel are compared to corresponding wind tunnel data at subsonic and supersonic speeds. It is shown that the flowfields derived from the water tunnel can be representative of those found at subsonic speeds although isolated body vortex locations agree more with those measured at supersonic speeds and fins is shown to modify the body vortex structure dramatically, the degree of modification varying with axial location of the fins. A speed effect is seen to exist in the water tunnel that can change some vortex flowfield characteristics from those of a subsonic flow to those observed at supersonic speeds. Finally crossflow velocities and circulations are compared between the water and wind tunnel.

Descriptors :   *VORTICES, FLOW FIELDS, GUIDED MISSILE MODELS, FLOW VISUALIZATION, MODEL TESTS, WIND TUNNEL TESTS, WATER TUNNELS, COMPARISON, SUBSONIC CHARACTERISTICS, SUPERSONIC CHARACTERISTICS, FINS, CRUCIFORM CONFIGURATIONS, VELOCITY, GREAT BRITAIN.

Subject Categories : Fluid Mechanics
      Guided Missiles

Distribution Statement : APPROVED FOR PUBLIC RELEASE