风雷软件LES开发设计与验证  

Development and verification of LES model in NNW-PHengLEI

作　　者：张子佩 赵钟 陈坚强[1,2] 刘健[1,2] 邓小兵[1,2] Zipei ZHANG;Zhong ZHAO;Jianqiang CHEN;Jian LIU;Xiaobing DENG(State Key Laboratory of Aerodynamics,Mianyang 621000,China;Computational Aerodynamics Institute,China Aerodynamics Research and Development Center,Mianyang 621000,China)

机构地区：[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

出　　处：《航空学报》2023年第6期151-168,共18页Acta Aeronautica et Astronautica Sinica

基　　金：国家数值风洞工程。

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。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.

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 

分 类 号：V19[航空宇航科学与技术—人机与环境工程]