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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2021, Vol. 42 ›› Issue (9): 625739-625739.doi: 10.7527/S1000-6893.2021.25739

• Special Topic of NNW Progress and Application • Previous Articles     Next Articles

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

CHEN Jianqiang, WU Xiaojun, ZHANG Jian, LI Bin, JIA Hongyin, ZHOU Naichun   

  1. Computational Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China
  • Received:2021-03-30 Revised:2021-04-29 Published:2021-06-08
  • Supported by:
    National Numerical Windtunnel Project

Abstract: 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.

Key words: National Numerical Wind tunnel (NNW) project, Computational Fluid Dynamics (CFD), unstructured grids, flow simulation, software development, parallel computation

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