Accession Number : AD0713705

Title :   RESEARCHES ON THE PROPAGATION AND DECAY OF VORTEX RINGS.

Descriptive Note : Final rept.,

Corporate Author : AEROSPACE RESEARCH LABS WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Johnson,Gary M.

Report Date : JUN 1970

Pagination or Media Count : 51

Abstract : The propagation of vortex rings in air was studied via stroboscopic photography and hot-wire anemometry. Measurements of vortex time of flight, axial velocity distribution, and geometry were made. Empirical formulas are developed and compared with the existing theories. It is found that the linear momentum of vortex rings is conserved and that the ratio of vortex ring radius to core radius is approximately constant. (Author)

Descriptors :   (*VORTICES, PROPAGATION), RINGS, JETS, SMOKE, FLOW VISUALIZATION

Subject Categories : Aerodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE