Virtual Flight Navier-Stokes Solver and its Application

A multi-purpose CFD software VFNS (Virtual Flight Navier-Stokes solver) is developed for aerodynamic and flight dynamic applications. The software is specifically designed to support the research works on coupling problems between aerodynamics and flight dynamics. It employs 6-DOF capability for simulating forced or free moving problems and chimera capability for simulating moving body dynamics including control laws. These challenging applications are enabled by coupling an unsteady, parallel Navier-Stokes flow solver with flight dynamics in sub-iterations of dual-time stepping algorithm. This paper will introduce the numeric methods used in this software and give some applications in free-to-pitch simulations for a square cross-section missile.