Accession Number : AD0783750

Title :   Simulation of Wake Vortices Descending in a Stably Stratified Atmosphere.

Descriptive Note : Final rept. Sep 73-Mar 74,

Corporate Author : HYDRONAUTICS INC LAUREL MD

Personal Author(s) : Brown,Clinton E. ; Kirkman,Karl

Report Date : JUL 1974

Pagination or Media Count : 38

Abstract : An experimental water tank simulation of aircraft wake vortices descending in a stable atmosphere has indicated that the atmospheric stability stops the downward movement and in some cases produces a subsequent rebound. The tests were carried out in a large ship model basin using a rectangular planform wing. Lift coefficients were selected, and stable atmospheric conditions were obtained by temperature (density) stratification of the towing basin. The model parameters and stability conditions cover the most extreme cases to be expected in full scale flight.

Descriptors :   *Wake, *Atmospheric disturbances, *Aerodynamic control surfaces, *Model tests, *Simulation, *Model basins, Hydrodynamics, Vortices, Stratification, Aircraft

Subject Categories : Aerodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE