基于高精度高效率CFD方法和三通道三回路控制方案的数值虚拟飞行研究

Virtual Flight Simulation, a multidisciplinary simulation technology designed to reproduce real flight, has posed urgent demands for the development of several key technologies, such as CFD methods, flight control and massively parallel computation. Within this project, the breaking through of the following key technologies are expected: the chimera grid technology based on well-distributed data structure, the applicability evaluation and user guidance of DES method corresponding to the present problems, the design and integration of three-channel and three-loop flight control system. Through the above work, Virtual Flight Simulation process will be established and enhanced for heterogeneous computation environment in terms of parallel algorithms design and optimization. Taking advantage of the applicant’s HPC, complex problems are to be investigated such as the fast maneuver of aircrafts at high angle of attack, and virtual flight with three-channel and three-loop coupling control, which are difficult to handle by traditional methods. Evaluation on flight control system as well as flight mechanical properties are then carried out. Through this project, a deep understanding will be gained in the coupling mechanism of pneumatic & kinematic, and the development and application of Virtual Flight Simulation will also be actively promoted.

数值虚拟飞行是一种旨在复现真实飞行、具有多学科背景的新型仿真技术，在CFD理论与方法、飞行控制、并行计算等关键技术上均有迫切发展的需求。拟通过突破若干关键技术，包括：发展具有良好分布式数据特性的结构重叠网格技术、针对评估对象开展DES方法的适用性评价并建立使用规范、开展三通道和三回路的飞行控制方案设计和集成，以点带面的建立和完善数值虚拟飞行仿真流程，并开展面向异构计算环境的并行设计和算法优化。利用依托单位的优势计算资源，针对传统仿真方法难以严谨研究的大迎角快速机动、三通道/三回路的耦合控制飞行等难点问题进行仿真计算，以及飞控设计品质评估和飞行力学特性研究。通过本项目的开展，有助于深入研究飞行控制下的气动/运动耦合机理和规律，并能积极促进数值虚拟飞行仿真技术的发展和应用。

数值虚拟飞行是一种旨在复现真实飞行、具有多学科背景的新型仿真技术，对研究由空气动力学/刚体运动/飞行控制的多层次非线性耦合产生的一系列物理问题有重要作用。本项目按照制定的研究计划，完成了以下研究内容：高效鲁棒的重叠网格并行算法，运动非定常问题的DES模拟和评价性研究，基于异构架构的CFD并行计算和优化，三通道和三回路的飞行控制方案设计和实现。通过上述工作，建立了完整的虚拟飞行仿真流程，开展了飞行控制品质评估和飞行力学特性研究，获得了一些有工程应用价值的结论。本项目开发的CFD软件，在github上进行了开源发布，对促进CFD仿真技术的发展有积极作用。