Abstract:

Navier-Stokes calculations on multiblock are performed to compute the drag for the DLR-F6 wing/body/pylon/nacelle configuration using CFD software TRIP2.0.The structured grids(1-to-1),test case and test data are from Drag Prediction Workshop Ⅱ(DPWⅡ), and the reference numerical results are obtained by CFL3D.The effects of mesh density and turbulent models on the aerodynamic characters and pressure distributions are carefully studied. The results are verified in comparison with the test data and CFL3D results. Grid refinement leads to convergences of the numerical results with both SA and SST turbulent models.It is demonstrated that various turbulent models have little influence on pressure drag, whereas obvious influence on friction drag is observed, and various turbulent models and grids have some influence on pressure distribution.

Key words: aerodynamics,  , numerical , simulation,  , drag,  , turbulent , model