Accession Number:

AD0754055

Title:

On the Aerodynamics of Wake Vortices

Descriptive Note:

Technical rept.

Corporate Author:

HYDRONAUTICS INC LAUREL MD

Personal Author(s):

Report Date:

1972-10-01

Pagination or Media Count:

38.0

Abstract:

The effect of wing span loading on the development of fully rolled up wing trailing vortices is discussed. It is shown that parabolic wing loadings produce potential flow maximum core rotary speeds which are finite and less than fifty percent of the downwash speeds at the plane of symmetry. The development of turbulent cores is analyzed and core growth is predicted to occur as the two thirds power of time whereas the peak velocities fall off as the inverse one third power. Axial flow effects of the wing profile drag and lifting system are shown to lead to axial jets on the vortex axis which may either follow the aircraft or exceed the free stream velocity depending on the ratio of profile drag to induced drag.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE