基于HPC的多学科多物理场耦合虚拟飞行试验方法

HPC-based Virtual Flight Test Method for Multidisciplinary Multiphysical Field Coupling

虚拟飞行试验是临近空间飞行器总体性能验证补充手段。多物理场耦合建模仿真的复杂性对虚拟试验精度和效率都形成挑战,已成为系统仿真领域的一个经典问题。基于此,建立了多物理场耦合仿真模型,提出多物理场耦合的高效并行仿真架构和多专业异构CAE 模型协同运行方法,研究了任务级、算法级混合大规模并行仿真技术,构建了基于高性能计算机(High performance computer,HPC)的虚拟飞行试验系统(Flight system testbed,FST),显著提高了虚拟飞行试验效率,对飞行器总体设计水平的提升具有重要意义。

Multidisciplinary simulation based on virtual flight system testbed (FST) will become an alternative way for the overall performance validation of near space hypersonic vehicles (HSV). The complexity of multi-physical field coupled modeling and simulation challenges the accuracy and efficiency of virtual experiment. Therefore, a multi-physical-field coupling simulation model is established. The architecture of HPC-FST is explicitly expounded for large-scale parallel multidisciplinary virtual flight tests and multi-physics coupling simulation of whole vehicle. Moreover, an integration algorithm is developed for heterogeneous CAE models in collaborative simulation. A HPC based parallel virtual flight test method with a task-level and algorithm-level hybrid large-scale parallel simulation technology is developed for whole flight envelope simulation, and a large-scale parallel simulation algorithm is proposed for efficient simulation of aerodynamic flow field. Based on the supercomputer, HPC-FST is a high efficient platform for overall performance validation of HSV, which will reduce development cost as well as improve integrated design capability.