Theodorsen’s solution for lift of aerofoil undergoing sinusoidal motion.

Time histories are built assuming:

  • a(t)=+/- A cos(w t) ??? not verified

  • \(h(t)=-H\cos(w t)\)

param w

frequency (rad/sec) of oscillation

param A

amplitude of angle of attack change

param H

amplitude of plunge motion

param c

aerofoil chord

param rhoinf

flow density

param uinf

flow speed

param x12

distance of elastic axis from mid-point of aerofoil (positive if the elastic axis is ahead)