Accession Number : AD0753131

Title :   The Structure of Turbulent Line Vortices,

Corporate Author : CALIFORNIA INST OF TECH PASADENA

Personal Author(s) : Saffman,P. G.

Report Date : 13 OCT 1972

Pagination or Media Count : 37

Abstract : A theory is given to explain the observed dependence on Reynolds number of the decay of turbulent line vortices. The discussion considers first the self-similar vortex, in which all quantities are assumed to depend only on the circulation at infinity, the Reynolds number, and the time from a virtual origin. It is argued that the turbulent line vortex has a triple structure: an outer vortex of given radius, an inner vortex, and a viscous core. The axial velocity in the core, produced by growth of a trailing vortex shown to be Reynolds number dependent. (Author)

Descriptors :   (*TURBULENCE, ATTRITION), (*AIRCRAFT, WAKE), VORTICES, THEORY, MATHEMATICAL MODELS, AVIATION SAFETY, STATISTICAL DISTRIBUTIONS, VELOCITY, AERODYNAMIC CONTROL SURFACES, EQUATIONS OF MOTION

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE