采用SST k-ω湍流模型的DDES方法模拟湍流,并引入隐式双时间步的低速预处理技术,数值求解了Navier-Stokes方程,并以此为技术手段,模拟了低速大迎角三角翼绕流及大迎角椭球绕流问题,计算结果展示了由于分离引起的旋涡生成、发展及破碎过程,所得的定量计算数据与实验结果相吻合,表明SST-DDES模型耦合低速预处理技术可以较好地...
SST-DDES气膜冷却流动掺混横流射流拟序结构采用基于SST湍流模型的延迟分离涡模拟(DDES)方法,对吹风比为0.5的平板孤立方孔横流射流进行数值模拟研究,并与实验测量结果进行对比;同时,基于捕捉到的流场大涡拟序结构,分析了射流与主流掺混及损失机理.研究结果表明:气膜冷却流场中存在复杂的大涡拟序结构,这种强三维流动对...
气动噪声,气动光学等问题,应用DDES开展了详细的数值模拟研究.首先,针对典型起落架大分离问题,本文基于ANSYS CFX计算流体力学软件,分别采用基于两方程剪切应力输运(SST... 董庆利 - 《西北工业大学》 被引量: 0发表: 2019年来源期刊 汽车工程学报 研究点推荐 SST-DDES 汽车外气动噪声模拟 风洞试验 0...
entropy Article An Entropy-Assisted Shielding Function in DDES Formulation for the SST Turbulence Model Ling Zhou 1, Rui Zhao 2,* and Xiao-Pan Shi 2 1 School of Energy and Power Engineering, Huazhong University of Science & Technology, Wuhan 430074, China; lzhou@hust.edu.cn 2 School of ...
Both LES and DDES are conducted in a low-Reynolds number tip leakage flow model. The DDES uses the SST kω model and employs the same grid with the LES, but the turbulence field diverges from the LES result. Referring to the comparison between LES and DDES, a modification of ...
SST-DDES 模型在大分离流动问题中 的应用[J]. 南京航空航天大学学报,2017,49(2):206-211. Hu Ou, Zhao Ning, Shen Zhiwei. Simulation of large separated flow with SST-DDES model[J]. Journal of Nanjing University of Aeronautics & Astronautics, 2017, 49(2): 206-211. (in Chinese...
Both SST-SAS and SST-DDES achieve results infavorable agreement with the experiment data. However, a finer meshgeneration is needed for SST-SAS, which means that SST-SAS stillremains improvements.Di WuWeiwen ZhaoDecheng WanThe proceedings of the twenty-eighth (2018) international Ocean and polar...
We incorporated the SLA modification into the SST-DDES model and quantified the benefit of it in turbomachinery applications.Guoping XiaZifei YinGorazd MedicProgress in Hybrid RANS-LES Modelling: Papers Contributed to the 7th Symposium on Hybrid RANS-LES Methods, 17–19 September, 2018, Berlin, ...
In turbomachinery CFD simulations, Reynolds-Averaged Navier-Stokes (RANS) based approaches tend to under-predict turbulent mixing, which is of particular importance in the endwall region. Detached...doi:10.1007/978-3-030-27607-2_27Guoping XiaZifei YinGorazd Medic...