Adaptive cartesian grid method in numerical simulation of flow field about civil-plane high-lift system
Fengwei Li · Kongqi donglixue xuebao · 2004
Because of the complexities in both configuration and flow field, there are great difficulties in the numerical simulation of flow around civil airplane high-lift configuration with nose slats and inboard and outboard flaps. In this paper, a modified Cartesian grid method is introduced to simulate the complex flow by using the adaptive grid technique. The Cartesian grid method uses a non-body-fitted grid to discretize the flow field about an object. We generate the Cartesian grids using a cell-cutting algorithm based on the tree data structure, and geometry-based refinement of grids is finished automatically to improve quality of the generated grids. The multi-zone technique and face-to-face algorithm are employed to simplify the great difficulties in grid generation, and to precisely establish the flow field information exchange among zones. Using the finite volume method and the dual-time stepping method, the flow around a civil-plane high-lift configuration is computed by solving the Euler equations. The results in good agreement between computation and experiment data prove that grid generation and flow calculation are correct and feasible, and show that the present method is effective one for solving the flow over the complex 3-D high-lift systems.