Comparative study of implicit and subgrid‐scale model large‐eddy simulation techniques for low‐Reynolds number airfoil applications
Comparative study of implicit and subgrid‐scale model large‐eddy simulation techniques for low‐Reynolds number airfoil applications
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低雷诺数翼型应用的隐式和亚网格模型大涡模拟技术的比较研究
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
P. Orkwis
中科院分区：
文献类型：
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作者：
D. Garmann;M. Visbal;P. Orkwis
对采用和不采用动态Smagorinsky亚网格尺度（SGS）模型的高保真隐式大涡模拟（ILES）技术进行了计算研究，以检验SGS模型对SD7003翼型过渡流解的贡献。过去的研究表明，不使用SGS模型的ILES在应用于典型湍流时，可以产生与传统的基于SGS的大涡模拟（LES）相当的结果，有时甚至是有利的结果。本文评估了SGS模型在低雷诺数翼型应用中的必要性，以确认在没有SGS建模的情况下使用ILES来解决更广泛的问题，例如与微型飞行器和低压涡轮机有关的问题。确定动态Smagorinsky模型的添加不会显著影响本研究中检查的空间分辨率和雷诺数的翼型截面周围测量的时间平均流量或统计量。此外，ILES的鲁棒性和降低的计算成本，没有SGS模型证明了ILES的吸引力，作为一种替代传统LES。2012年出版。本条目属于美国政府作品，在美国属于公有领域。
A computational study of a high‐fidelity, implicit large‐eddy simulation (ILES) technique with and without the use of the dynamic Smagorinsky subgrid‐scale (SGS) model is conducted to examine the contributions of the SGS model on solutions of transitional flow over the SD7003 airfoil section. ILES without an SGS model has been shown in the past to produce comparable and sometimes favorable results to traditional SGS‐based large‐eddy simulation (LES) when applied to canonical turbulent flows. This paper evaluates the necessity of the SGS model for low‐Reynolds number airfoil applications to affirm the use of ILES without SGS‐modeling for a broader class of problems such as those pertaining to micro air vehicles and low‐pressure turbines. It is determined that the addition of the dynamic Smagorinsky model does not significantly affect the time‐mean flow or statistical quantities measured around the airfoil section for the spatial resolutions and Reynolds numbers examined in this study. Additionally, the robustness and reduced computational cost of ILES without the SGS model demonstrates the attractiveness of ILES as an alternative to traditional LES. Published 2012. This article is a US Government work and is in the public domain in the USA.