1. Our Criticism of 2d Kutta-Zhukovsky Circulation Theory of Lift.
Classical Kutta-Zhukovsky circulation theory of lift, as a 2d theory for a 3d real phenomenon, is unphysical. The Kutta condition of specifying the velocity to be zero at a point on the boundary of inviscid flow where the flow is not entering (including the trailing edge), is mathematically meaningless and physically impossible.
The classical proof of Kelvin's theorem is incorrect from wellposedness, since the vorticity equation can exhibit exponential growth of perturbations, and perturbation is part of wellposedness.
2. Our Criticism of Prandtl's Boundary Layer Theory of Drag
Prandtl's boundary layer theory attributes drag to the presence of boundary layers. We compute drag in slightly viscous flow accordance with observation by solving the Navier-Stokes equations with slip boundary condition without presence of boundary layers. We conclude that the major part of drag (form drag) in slightly viscous flow does not originate from any boundary layer, and thus that Prandtl's theory does not cover the major part of drag in slightly viscous flow.
3. Our New Theory of Flight
Reviewer 2 offers the following starting point for the continued discussion with AIAA:
- I believe that serious issues of substantial public interest are involved.