基于Delaunay图映射的动弹网格技术及其应用

Dynamic grid deformation technique based on Delaunay graph mapping for aeroelastic investigation

在多块混合网格的基础上发展了一套基于Delaunay图映射方法的动弹网格技术,实现了针对气动弹性计算的网格变形运动方法,并使用基于多块混合网格的RANS方程的有限体积法耦合结构静平衡方程,针对大展弦比无人机在实际使用中可能出现的显著的静气动弹性问题进行了计算、分析和研究。研究结果表明,所发展的动弹网格方法为粘性混合网格的变形提供了较好的解决方案;RANS方程解算器具有较高的精度和较强的适用性,具备求解粘性流体与结构耦合等复杂航空气动弹性问题的能力。

In this paper, an effective and well robust dynamic grid deformation method based on the Delaunay graph mapping is developed to solve the deformation of 3-D hybrid multiblock grids. The static aeroelastics problems of large aspect ratio UAVs are investigated by the finite volume method coupled with structure static equations. The comparison, analysis and investigation were done as well. The result is improved that the technology of dynamic grid based on Delaunay graph mapping is a better solution of viscous dynamic grid deformation. This method has better capability of solving the complex aeroelastics problems.