A new inflow turbulence generator for large eddy simulation evaluation of wind effects on a standard high-rise building
A new inflow turbulence generator for large eddy simulation evaluation of wind effects on a standard high-rise building
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一种新型入流湍流发生器，用于标准高层建筑风效应大涡模拟评估
DOI：
10.1016/j.buildenv.2018.03.059
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发表时间：
2018-06
影响因子：
7.4
通讯作者：
Xie Zhuangning
中科院分区：
文献类型：
--
作者：
Yu Yuanlin;Yang Yi;Xie Zhuangning
来流湍流的产生是影响大气边界层大涡模拟的关键问题之一。本文在前人随机流发生技术的基础上，提出了一种改进的大涡模拟入流湍流发生器--窄带合成随机流发生器。新的NSRFG技术产生了一个更简洁的表达式，并克服了一些缺陷，在以前的研究RFG技术严格保持无发散条件，相干函数，湍流谱的ABL流理论。通过模拟一个典型的湍流边界层流动验证了该方法的有效性，并将NSRFG方法与一致性离散合成RFG方法进行了比较。在华南理工大学边界层风洞中，对CAARC标准建筑模型的湍流绕流进行了数值模拟。最后，通过数值模拟和风洞试验对结构的风压、基底弯矩和风振响应进行了比较，验证了该方法的可行性和有效性。
The generation of inflow turbulence is among the key issues that affect the large eddy simulation (LES) of atmospheric boundary layer (ABL) flow. An improved inflow turbulence generator for LES, the narrowband synthesis random flow generator (NSRFG), is proposed in this study based on previous random flow generation (RFG) techniques. The novel NSRFG technique yields a more concise expression and overcomes some defects in the previous study of RFG techniques by strictly maintaining a divergence-free condition, coherency function, and turbulent spectra of the ABL flow theoretically. The new technique was validated by simulating a typical turbulent ABL flow, and comparisons between the NSRFG method and the consistent discretizing and synthesizing RFG method are presented. The new technique was then applied to the numerical simulation of the turbulent flow around the CAARC standard building model, which was tested in the boundary layer wind tunnel of the South China University of Technology. A detailed comparison of the wind effects obtained from numerical simulations and a wind tunnel test, including wind pressures, base moments, and wind-induced responses, was finally performed to demonstrate the feasibility and effectiveness of the new technique.
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影响因子：
1.6
作者：
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通讯作者：
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作者：
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DOI：
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DOI：
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DOI：
10.1016/j.jweia.2013.06.014
发表时间：
2013-09
影响因子：
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作者：
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