Investigation of Viscous Line Vortices With and Without the Injection of Core Turbulence.
ROCHESTER APPLIED SCIENCE ASSOCIATES INC N Y
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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