A Surface Mesh Movement Algorithm for Aerodynamic Optimization of the Nacelle Position on Wing-Body-Nacelle-Pylon Configuration

摘要

A surface mesh movement algorithm ,combining surface mesh mapping with Delaunay graph mapping , is proposed for surface mesh movement involving complex intersections ,like wing/pylon intersections .First ,sur‐face mesh mapping is adopted for the movement of intersecting lines along the spanwise direction and the wing sur‐face mesh ,and then Delaunay graph mapping is utilized for the deformation of the pylon surface mesh ,guarantee‐ing consistent and smooth surface meshes .Furthermore ,the corresponding surface sensitivity procedure is imple‐mented for accurate and efficient calculation of the surface sensitivities .The proposed surface mesh movement al‐gorithm and the surface sensitivity procedure are integrated into a discrete adjoint‐based optimization framework to optimize the nacelle position on the DLR‐F6 wing‐body‐nacelle‐pylon configuration for drag minimization .The re‐sults demonstrate that the strong shock on the initial pylon surface is nearly eliminated and the optimal nacelle po‐sition can be obtained within less than ten iterations .