Accession Number:

AD0699415

Title:

EXPERIMENTAL DETERMINATION OF HELICOPTER TIP VORTEX GEOMETRY USING SMOKE

Descriptive Note:

Final rept. 10 May 1966-31 Aug 1967

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE AEROELASTIC AND STRUCTURES RESEARCH LAB

Personal Author(s):

Report Date:

1969-12-01

Pagination or Media Count:

19.0

Abstract:

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.

Subject Categories:

  • Aerodynamics
  • Helicopters
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE