Analysis of selected problems involving vortical flows [PDF]
Three selected problems involving vortical flows are analyzed and discussed including: the trailing vortex behind a wing; rotor blade-vortex interaction; and the leading edge vortex on a flat ...
Lee, D. J., Mourtos, N. J., Roberts, L.
core +1 more source
Blade-mounted trailing edge flap control for BVI noise reduction [PDF]
Numerical procedures based on the 2-D and 3-D full potential equations and the 2-D Navier-Stokes equations were developed to study the effects of leading and trailing edge flap motions on the aerodynamics of parallel airfoil-vortex interactions and on ...
Charles, B. D. +3 more
core +1 more source
An embedded mesh procedure for leading-edge vortex flows [PDF]
A cell-vertex scheme is outlined for solving the flow about a delta wing with M (sub infinity) is greater than 1. Embedded regions of mesh refinement allow solutions to be obtained which have much higher resolution than those achieved to date. Effects of
Murman, Earll M., Powell, Kenneth G.
core +1 more source
An explanation of the instability of the free vortex cores occurring over delta winds with raised edges [PDF]
By rolling up the surfaces of discontinuity originating from the leading edge of delta wings, free vortex cores are formed above the wing. In case of greater angles of incidence, the flow in these vortex cores shows an instability which abruptly produces
Ludwieg, H.
core +1 more source
Highly deformable flapping membrane wings suppress the leading edge vortex in hover to perform better. [PDF]
Proc Natl Acad Sci U S AGehrke A, Mulleners K.
europepmc +1 more source
Recent extensions to the free-vortex-sheet theory for expanded convergence capability [PDF]
A new version of the free vortex sheet formulation is presented which has greatly improved convergence characteristics for a broad range of geometries. The enhanced convergence properties were achieved largely with extended modeling capabilities of the ...
Grantz, A. C. +2 more
core +1 more source
A Three-Dimensional Solution of Flows over Wings with Leading-Edge Vortex Separation. Part 1: Engineering Document [PDF]
A method of predicting forces, moments, and detailed surface pressures on thin, sharp-edged wings with leading-edge vortex separation in incompressible flow is presented.
Brune, G. W. +4 more
core +1 more source
Improvement of maneuver aerodynamics by spanwise blowing [PDF]
Spanwise blowing was used to test a generalized wind-tunnel model to investigate component concepts in order to provide improved maneuver characteristics for advanced fighter aircraft. Primary emphasis was placed on performance, stability, and control at
Campbell, J. F., Erickson, G. E.
core +1 more source
Estimation of wing nonlinear aerodynamic characteristics at supersonic speeds [PDF]
A computational system for estimation of nonlinear aerodynamic characteristics of wings at supersonic speeds was developed and was incorporated in a computer program. This corrected linearized theory method accounts for nonlinearities in the variation of
Carlson, H. W., Mack, R. J.
core +1 more source
A theory for the core flow of leading-edge vortices [PDF]
Separation-induced leading-edge vortices can dominate the flow about slender wings at moderate to high angles of attack, often with favorable aerodynamic effects.
Luckring, James M.
core +1 more source