Wake roll-up behind wings with ground effect

الملخص EN

A numerical method for the calculation of the three-dimensional wake rollup behind symmetric wings with ground effect and its aerodynamic characteristics for steady low subsonic flow have been developed.

A non-planar quadrilateral vortex-ring method with vortex wake relaxation iterative scheme for lifting surfaces is obtained.

A computer program was build to treat wings with breaks, span wise trailing edge flaps, local dihedral angle, camber, twist and ground effect.

Forces and moments are obtained from vector product of local velocity and vortex strength multiplied by density.

The program has been validated for a number of configurations for which experimental data is available.

Good agreement has been obtained for these configurations.

Also many results obtained for different cases of wing with different shapes parameters.