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