- Bliss, Donald B. and Wachspress, Daniel A. and Quackenbush, Todd R., NEW APPROACH TO THE FREE WAKE PROBLEM FOR HOVERING ROTORS.,
Annual Forum Proceedings - American Helicopter Society, vol. 2 no. 41st
pp. 463 - 477 .
(last updated on 2007/04/09)
A new approach to the free wake problem for a hovering rotor has been developed. An influence coefficient solution method is used to find the rotor wake solution which is steady in a reference frame rotating with the blades. This solution scheme solves directly for the conditions of free wake equilibrium by a procedure which does not involve time stepping and the associated use of numerical damping or special convergence methods. The influence coefficient solution method was implemented into a hover wake computer program having a three-part wake model for the tip vortex.