FlowStar:国家数值风洞(NNW)工程非结构通用CFD软件

计算流体力学（CFD）仿真软件是流体相关的数学物理知识和工程实践经验的数字化表达，是工业数字化转型的重要助推。然而，大型工业CFD软件研发难度极高，需要同时兼顾功能多样、系统稳定、性能优越、交互友好等特征。依托国家数值风洞（NNW）工程，研发出一款通用流场模拟软件NNW-FlowStar，并在航空、航天等工业部门大力推广使用。软件基于非结构有限体积求解方法和大规模并行计算技术开发，结合现代化软件工程思维设计，具备先进的数值方法、高效的计算效率和友好的用户操作界面，可满足各类复杂外形的高效气动模拟。独特的重叠网格技术配合六自由度运动模块，可帮助实现武器分离、舱门定轴转动等各类气动-运动协同仿真需求。多类标模案例和复杂工程应用表明，FlowStar软件算法鲁棒、精度可靠，是一款高精度、高效率、高可靠性的通用CFD仿真软件。通过对软件的架构设计和功能应用进行介绍，使相关从业人员能更好地了解FlowStar软件，最终促进国产自主CFD软件生态的良性发展。

FlowStar: General unstructured-grid CFD software for National Numerical Windtunnel (NNW) Project

Computational Fluid Dynamics (CFD) simulation software is the digital expression of fluid-related mathematical physical knowledge and engineering practice experience, significantly boosting the digital transformation of industry. However, the development of large-scale industrial CFD software is extremely difficult, requiring consideration of factors such as the characteristics of diverse functions, stable systems, superior performance, and friendly interaction. Relying on the National Numerical Windtunnel (NNW) project, we develop a general flow field simulation software, NNW-FlowStar, which has been applied in aviation, aerospace and other industries. The software is developed based on the unstructured finite volume method and large-scale parallel computing technology, combining modern software engineering thinking. With advanced numerical methods, good calculation efficiency and user-friendly interface, it can conduct aerodynamic numerical simulations of various complex shapes. The unique overlapping mesh technology combined with the six-degree-of-freedom motion module can help satisfy various coupled aerodynamic and rigid body motion numerical simulation requirements such as weapon separation and fixed axis rotation of the cabin. A variety of standard model cases and complex engineering applications show that FlowStar is a general CFD simulation software with high precision, high efficiency and high reliability. Through the introduction of the software architecture design and functional application, relevant users can better understand FlowStar, and finally promote the benign ecology of domestic independent CFD software development.