Investigation of the Dissipation of the Tip Vortex of a Rotor Blade by Mass Injection
ROCHESTER APPLIED SCIENCE ASSOCIATES NY
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The report describes an experimental research program in which the outer section of a UH-1D helicopter blade was modified to incorporate a system for injecting the tip vortex produced by the blade with a mass of linearly directed air. The effects of nozzle geometry, the velocity of injection, the turbulence wavelength, and the angle of injection on the resulting strength of the trailed tip vortex were investigated, and the results are presented in terms of quantitative measurements of the circulation strength as a function of the injected mass of air.
- Fluid Mechanics