航空学报 > 2023, Vol. 44 Issue (6): 127171-127171   doi: 10.7527/S1000-6893.2022.27171

风雷软件LES开发设计与验证

张子佩1,2, 赵钟1,2(), 陈坚强1,2, 刘健1,2, 邓小兵1,2   

  1. 1.空气动力学国家重点实验室,绵阳  621000
    2.中国空气动力研究与发展中心 计算空气动力研究所,绵阳  621000
  • 收稿日期:2022-03-18 修回日期:2022-05-02 接受日期:2022-05-25 出版日期:2022-06-21 发布日期:2022-06-17
  • 通讯作者: 赵钟 E-mail:bell_cardc@163.com
  • 基金资助:
    国家数值风洞工程

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

摘要:

基于国家数值风洞风雷软件开源框架,设计开发了LES(Large Eddy Simulation)湍流模型,主要包括Fourier谱/有限差分方法LES求解器和有限体积/有限差分方法LES求解器。简要介绍了采用的不可压缩流动求解的投影法、Fourier谱/有限差分混合方法、亚格子模型等理论方法,给出设计的软件框架和计算流程,尤其说明采用的松/紧2种耦合模式。通过数值模拟不可压缩槽道湍流、亚临界雷诺数圆柱绕流、NACA0012临界攻角的低频振荡算例,验证求解器的计算精度和复杂湍流模拟能力。基于风雷开源框架设计的开源LES模型,具备高精度数值格式、亚格子模型、湍流统计等通用模块,可为国内学者提供一个LES湍流模拟研究的开放平台。

关键词: 大涡模拟, 国家数值风洞(NNW)工程, 风雷软件, 投影法, Fourier谱/有限差分方法, 不可压缩槽道流动, 圆柱绕流, 低频振荡

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

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