A nonlinear hybrid vortex method for wings at large angle of attack
Previously cited in issue 08, p. 1181, Accession no. A82-22094
Kandil, O. A.↗
Engineering topics
Tureaud, T.
Publications and source records attributed to Tureaud, T..
Steady and unsteady nonlinear hybrid vortex method for lifting surfaces at large angles of attack
Steady and unsteady Nonlinear Hybrid Vortex (NHV) method, for low aspect ratio wings at large angles of attack, is developed. The method uses vortex panels with first-order vorticity distribution (equivalent to second-order doublet distribution) to calculate the induced velocity in the near field using closed form expressions. In the far field, the distributed vorticity is reduced to concentrated vortex lines and the simpler Biot-Savart's law is employed. The method is applied to rectangular wings in steady and unsteady flows without any restriction on the order of magnitude of the disturbances in the flow field. The numerical results show that the method accurately predicts the distributed aerodynamic loads and that it is of acceptable computational efficiency.
Kandil, O. A.↗