Answer Happy

Question B1: The influence of a helicopter, hovering over the ground at an elevation / in still air of density p, can be modelled using potential theory. The helicopter is replaced by a dipole, of strength λ, located h above the ground. a) Determine the stream function used to model this flow. b) Verify that the ground is effectively modelled (i.e. no flow crosses the ground). c) Determine the mathematical expression for the pressure distribution along the t ground in terms of 2, p, P., h and x. Neglect any gravitational effects. P. is the pressure of the still air far away from the ground. P Figure B1: Schematic of helicopter hovering over ground at height h.