Modulating higher-order statistics of turbulent boundary layer wind fields using randomized grid roughness

IF 4.2 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-03-06 DOI:10.1016/j.jweia.2025.106042

Mariel Ojeda-Tuz , Mohit Chauhan , Pedro Fernández-Cabán , Ryan Catarelli , Michael Shields , Kurtis Gurley

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引用次数: 0

Abstract

Near ground wind velocity observations and wind tunnel measurements have identified height dependent non-Gaussian behavior in longitudinal wind turbulence. The potential sensitivity of bluff body peak pressure loads to non-Gaussian turbulence motivates an investigation to modulate longitudinal skewness in the approach flow through passive mechanical turbulence generation. It is currently an open question as to whether higher-order properties of turbulence can be modulated via roughness element grid. This research leverages outcomes from a recent active machine learning experimental study to modulate turbulence profiles in a boundary layer wind tunnel using an automated roughness grid. Reynolds stress fraction analyses of turbulence data from hundreds of non-homogeneous roughness configurations are related to the observed along wind turbulence skewness profile. The results identify a relationship between roughness element configuration features and resultant skewness profiles, providing insights into modulating higher-order longitudinal turbulence behavior in boundary layer wind simulation.

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用随机网格粗糙度调制湍流边界层风场的高阶统计量

近地面风速观测和风洞测量已经确定了纵向风湍流中高度相关的非高斯特性。钝体峰值压力载荷对非高斯湍流的潜在敏感性促使研究通过被动机械湍流产生来调节进近流中的纵向偏度。湍流的高阶特性能否通过粗糙单元栅格进行调制，目前是一个悬而未决的问题。本研究利用了最近一项主动机器学习实验研究的结果，利用自动粗糙度网格来调节边界层风洞中的湍流剖面。对数百种非均匀粗糙度结构湍流数据的雷诺应力分数分析与观测到的沿风湍流偏度剖面有关。结果确定了粗糙度单元配置特征与产生的偏度剖面之间的关系，为边界层风模拟中调制高阶纵向湍流行为提供了见解。

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来源期刊

Journal of Wind Engineering and Industrial Aerodynamics 工程技术-工程：土木

CiteScore

8.90

自引率

22.90%

发文量

306

审稿时长

4.4 months

期刊介绍： The objective of the journal is to provide a means for the publication and interchange of information, on an international basis, on all those aspects of wind engineering that are included in the activities of the International Association for Wind Engineering http://www.iawe.org/. These are: social and economic impact of wind effects; wind characteristics and structure, local wind environments, wind loads and structural response, diffusion, pollutant dispersion and matter transport, wind effects on building heat loss and ventilation, wind effects on transport systems, aerodynamic aspects of wind energy generation, and codification of wind effects. Papers on these subjects describing full-scale measurements, wind-tunnel simulation studies, computational or theoretical methods are published, as well as papers dealing with the development of techniques and apparatus for wind engineering experiments.