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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2023, Vol. 44 ›› Issue (6): 127171-127171.doi: 10.7527/S1000-6893.2022.27171

• Fluid Mechanics and Flight Mechanics • Previous Articles    

Development and verification of LES model in NNW-PHengLEI

Zipei ZHANG1,2, Zhong ZHAO1,2(), Jianqiang CHEN1,2, Jian LIU1,2, Xiaobing DENG1,2   

  1. 1.State Key Laboratory of Aerodynamics,Mianyang  621000,China
    2.Computational Aerodynamics Institute,China Aerodynamics Research and Development Center,Mianyang  621000,China
  • Received:2022-03-18 Revised:2022-05-02 Accepted:2022-05-25 Online:2022-06-21 Published:2022-06-17
  • Contact: Zhong ZHAO E-mail:bell_cardc@163.com
  • Supported by:
    National Numerical Windtunnel Project

Abstract:

An LES model is developed based on the open-source framework provided by the NNW-PHengLEI software. This model mainly includes a hybrid Fourier spectra/finite difference LES solver and a finite volume/finite difference LES solver. The projection method for incompressible flow solution, the hybrid Fourier spectra/finite difference method and subgrid-scale models are briefly introduced, and close/loose coupling architectures of the two solvers are described in detail. The incompressible channel flow, the flow past a circular cylinder at sub-critical Reynolds number and the natural low-frequency oscillations of flow around a NACA0012 are numerically simulated, and the results show that the two solvers have high numerical accuracies and complex-turbulence simulation capabilities. The PHengLEI-LES solver is equipped with common modules including high-order difference schemes, subgrid-scale models and turbulence-statistic methods, providing an open-source LES platform for turbulence simulation research.

Key words: LES, National Numerical Wind tunnel (NNW) Project, PHengLEI software, projection method, hybrid Fourier spectra/finite difference, incompressible channel flow, flow past a circular-cylinder, low-frequency illations

CLC Number: