An Unstructured Computational Fluid Dynamics Method for Rotorcraft Aerodynamic Interaction

摘要

In this investigation, a robust and efficient unstructured Computational Fluid Dynamics(CFD) method is developed for rotorcraft aerodynamic interaction simulation. The advective upwind splitting method (ASUM+) with low-diffusion flux-splitting scheme is implemented to achieve the robust simulation at all flow speeds. For rotorcraft simulation, the CFD is solved using an Eulerian framework and is only applied in the vicinity of rotor blades or fuselage surface to generate the particles and vorticity sources of the vortices. The evolution of these vortices is resolved by applying the vortex particle method with a Lagrangian framework in the rest of the flow field.