NAVIER-STOKES FULL-POTENTIAL FREE-WAKE METHOD FOR ROTOR FLOWS

A technique for modeling unsteady three-dimensional compressible visco us now over lifting rotors in hover and forward night is described, Th e flow solver has three modules: 1) a compressible Navier-Stokes solve r for modeling the viscous now over the rotor and the rotor near wake; 2) a compressible potential flow solver for modeling the inviscid, is entropic potential now regions far away from the rotor, and 3) a Lagra ngian model for capturing and convecting the rotor wake once it leaves the Navier-Stokes domain, Results are presented for viscous now over a two-bladed untwisted rotor and a UH-60A rotor in hover, Good agreeme nt is found with measurements.