Coupled CFD and Particle Vortex Transport Method: Wing Performance and Wake Validations

摘要

The development of a new hybrid CFD approach using fully coupled Reynolds-Averaged Navier-Stokes (RANS) and Particle-based Vorticity Transport Method (PVTM) solvers is summarized in this paper. The methodology is applied to predict the performance and wake parameters of an isolated wing in low speed flow condition. The approach divides the flow field into several regions and uses appropriate flow solvers according to the dominant physical features of the flow in each region. The near body flow field, which is dominated by the effect of viscosity and geometry, is resolved using a 3D compressible RANS solver. The flow field outside of the RANS regions, which is primarily dominated by the vortices being shed from the aerodynamic surfaces, is simulated using a viscous implementation of the Particle-based Vorticity Transport Method. The coupling methodology and the appropriate information being transferred between the two solvers are also outlined. A stability enhancement procedure is implemented for the PVTM analysis. The results obtained using the coupled RANS/PVTM analysis compare well with experimental data, in particular the pressure distribution, sectional load, and tip vortex parameters (swirl velocity, core location, and core size).