基于混合RANS/LES方法的亚声速空腔流动主要影响因素的数值研究  

Numerical Study on Main Influencing Factors of Subsonic Cavity Flow Based on Hybrid RANS-LES Method

作　　者：艾俊强[1] 谢露[1] AI Junqiang;XIE Lu(AVIC The First Aircraft Institute,Xi’an 710089,China)

机构地区：[1]中国航空工业集团公司第一飞机设计研究院,西安710089

出　　处：《南京航空航天大学学报》2022年第5期927-936,共10页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家重点研发计划(2019YFB1704204);航空科学基金(2019ZA003002)。

摘　　要：随着计算流体力学(Computational fluid dynamics,CFD)技术的发展,混合雷诺平均N⁃S方程(Reynolds averaged Navier⁃Stokes,RANS)/大涡模拟(Large eddy simulation,LES)类方法被越来越多地应用于航空领域的大分离流动及气动噪声的仿真分析中,并取得了很好的效果。本文选取M219空腔流动风洞试验模型,在Ma=0.85的情况下,进行了混合RANS/LES方法的验证,并进行了网格敏感性分析;然后针对影响空腔流动的几个关键因素进行了仿真研究,并给出了主要的研究结果;最后,针对L/D=7的大长深比空腔,研究了增加隔板形成前后两个L/D=3.5的串列空腔的流动特点。With the development of computational fluid dynamics(CFD)technology,the hybrid Reynolds averaged Navier-Stokes(RANS)/large eddy simulation(RANS/LES)method has been increasingly applied to the simulation of large separation flows and aeroacoustics in the aviation field,and fine results have been achieved.In this paper,the M219 wind tunnel model is selected to validate the hybrid RANS/LES method under the condition of Ma=0.85,and the grid sensitivity analysis is carried out.Then,several key factors affecting the cavity flow are simulated,and the main results are obtained.Finally,the flow characteristics of tandem cavities with L/D=3.5 derived from a cavity with L/D=7 through inserting a plate in the middle are studied.

关 键 词：混合RANS/LES方法 空腔流动 网格敏感性 来流马赫数 串列空腔 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]