Accession Number : AD0713496

Title :   RESULTS OF TRAILING VORTEX STUDIES IN A TOWING TANK,

Corporate Author : BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH

Personal Author(s) : Olsen,John H.

Report Date : SEP 1970

Pagination or Media Count : 25

Abstract : Flow visualization studies were performed in a towing tank using an electrochemically activated dye. Although test Reynolds numbers were far below flight Reynolds numbers (10,000 vs 10,000,000), the results were strikingly similar to flight test data. Two types of instability were observed in the tank. An instability associated with the axial flow within the core was observed to destroy the flow in the neighborhood of the core without destroying the motion far from the core. A second instability involving the mutual interaction of the two vortices was observed but somewhat masked by the first instability. (Author)

Descriptors :   (*VORTICES, *WAKE), AIRCRAFT, INTERFERENCE, FLOW VISUALIZATION, STABILITY, AVIATION SAFETY, WATER TUNNELS

Subject Categories : Aerodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE