Accession Number : AD0785256
Title : Investigation of Viscous Line Vortices With and Without the Injection of Core Turbulence.
Descriptive Note : Final rept.,
Corporate Author : ROCHESTER APPLIED SCIENCE ASSOCIATES INC N Y
Personal Author(s) : Zalay,Andrew D. ; White,Richard P. , Jr. ; Balcerak,John C.
Report Date : FEB 1974
Pagination or Media Count : 159
Abstract : An experimental research program was conducted to investigate the general characteristics of a line vortex trailed from a three-dimensional lifting surface, and to determine how its general velocity distribution, turbulence level, turbulent frequency content, and dissipation rates are affected by the injection of a jet of turbulent air and by a fixed turbulence generator. Three component hot-wire surveys indicated that injection of the vortex core reduced the peak tangential velocity, established a strong axial flow component, increased the core diameter, altered the turbulence spectrum, and enhanced the turbulence level in the viscous core. (Modified author abstract)
Descriptors : *Rotor blades(Rotary wings), *Vortices, Vortex shedding, Wake, Turbulence, Flow visualization, Injection, Wind tunnel models
Subject Categories : Aerodynamics
Distribution Statement : APPROVED FOR PUBLIC RELEASE