Method Of Dynamic Grid On Multi-block Structured Mesh And Application

In this paper, a new method of dynamic grid is proposed for multi-block mesh. The methodcombines the improved Delaunay graph and infinite interpolation method:use the improved Delaunaygraph method to solve the deformation of the grid points in each block boundary, for the deformationof the internal nodes of each block, the transfinite interpolation moving mesh method is used. Thismethod has the mesh deformation capability, good generic and high deformation efficiencyadvantages. Compared to traditional Delaunay graph mapping methods, each grid point in improvedDelaunay graph method has different way of Delaunay graph moving, that is each grid pointcorresponds to a special way to Delaunay graph moving and moves can be obtained by solving theinterpolation matrix.In this article,the dynamic grid method apply to the high-lift device optimization design of thegap and the angle of the slat and flap. In the two-dimensional multi-element airfoil, use the method forthe deformation of initial mesh. Compared to the traditional re-generate the mesh, it can save time,and also easier to automate the optimization. In the three-dimensional wing-body lift system design,use the method of "two-dimensional and a half" to generate multi-block structured grid,and use thedynamic grid method to achieve grid reconstruction when the gap and the angle of the slat and flapchange. Flow field calculation software based on N-S equations conduct aerodynamic calculationsand the high-lift device optimization design of the gap and the angle of the slat and flap ofthree-dimensional state of landing state.