Simulation of transonic buffet with an automated zonal DES approach

Simulation of transonic buffet with an automated zonal DES approach
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使用自动分区 DES 方法模拟跨音速抖振

DOI:
10.1007/s13272-020-00466-7
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发表时间:
2020
影响因子:
--
通讯作者:
Krämer
Krämer
中科院分区:
--
文献类型:
--
作者:
Waldmann;Krämer

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在美国宇航局通用研究模型上研究了飞行雷诺数下的跨声速冲击。通过光谱分析,评价了两种不同的混合RANS/LES模型以及URANS方法对三维振动运动的分辨能力。自动区域DES和URANS模拟在自助细胞的频率和展向传播方面显示出相似的结果,而延迟分离涡模拟结果表明流动分离和激波运动之间存在强烈的相互作用。对于URANS和AZDES,提取的与跨音速振动相关的特征频率位于sr = 0.2-0.65的范围内,因此与近期相关研究结果一致。此外,对模拟时间序列进行了研究,观察到不同对流速度和波长的向展向移动的自助餐单元结构。
A study of transonic buffet on the NASA Common Research Model at flight Reynolds numbers is presented. The ability of two different hybrid RANS/LES models as well as the URANS approach for resolving three-dimensional buffet motion was evaluated by means of spectral analysis. Automated Zonal DES and URANS simulations show similar results in terms of buffet frequency and spanwise propagation of buffet cells, whereas the Delayed Detached Eddy Simulation results indicate a strong interaction between flow separation and shock motion. The extracted characteristic frequencies which are associated with transonic buffet are located in a range ofSr= 0.2–0.65 for URANS and AZDES and are therefore in accordance with findings from related recent research. Furthermore, the simulation time series were investigated and a structure of spanwise moving buffet cells with varying convection speed and wavelength could be observed.
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