EXPERIMENTAL DETERMINATION OF HELICOPTER TIP VORTEX GEOMETRY USING SMOKE
Final rept. 10 May 1966-31 Aug 1967
MASSACHUSETTS INST OF TECH CAMBRIDGE AEROELASTIC AND STRUCTURES RESEARCH LAB
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Experimental techniques were developed and proven to be successful as a means of providing correlation with the analytical treatment required to predict the actual tip vortex geometry of a helicopter rotor. The data were obtained by emitting smoke from the tip of one blade of a two-bladed rotor mounted in a wind tunnel so that the smoke is entrained by the tip vortex. The resulting smoke trace is photographed by a pair of cameras and a data reduction process is used to eliminate lens distortion and parallax.
- Fluid Mechanics