Towards benchmark validation of LES for ground-mounted solar panel wind loads

IF 4.2 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2024-08-10 DOI:10.1016/j.jweia.2024.105843

T.G. Eshete, T.N. Geleta, G.T. Bitsuamlak

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引用次数: 0

Abstract

Successful application of large-eddy simulation for wind load evaluation of ground-mounted solar panels (GMSPs) requires rigorous benchmark validation. A validation campaign exploring several LES parameters and wind tunnel model details is underway. This study is carried out on a $25 °$ tilt isolated GMSP with wind tunnel data as a target. The main LES parameters investigated are mesh size, solver time-step, time-discretization scheme, and the fetch distance from the inlet. A detailed geometric parametric study is conducted to explore the impact of the pressure tubing bundles and support structures of wind tunnel models on aerodynamics. It was found that the combined effects of mesh size, solver time-step, time-discretization scheme, and sampling frequency control the maximum reduced frequency modeled by LES. The pressure tubing bundles significantly altered the lower surface pressure pattern and magnitude, increasing local mean pressure by up to $50 %$ compared to a suspended flat plate. Comparison between the final validated case and the target wind tunnel shows an agreement within $5 %$ for wind field parameters at the reference height and within $\pm 15 %$ for mean and peak surface pressure coefficients. This study's findings will enhance the next phase of benchmark validation on an array of GMSPs in various geometric configurations.

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地面安装太阳能电池板风载荷 LES 的基准验证

要在地面安装太阳能电池板（GMSP）的风载荷评估中成功应用大风量模拟，需要进行严格的基准验证。目前正在开展一项验证活动，探索几个 LES 参数和风洞模型细节。本研究以倾斜隔离的 GMSP 为对象，以风洞数据为基础。所研究的主要 LES 参数包括网格尺寸、求解器时间步长、时间离散化方案以及与入口的距离。通过详细的几何参数研究，探讨了风洞模型的压力管束和支撑结构对空气动力学的影响。研究发现，网格尺寸、求解器时间步长、时间离散化方案和采样频率的综合影响控制着 LES 建模的最大降低频率。压力管束极大地改变了下表面压力的模式和大小，与悬浮平板相比，增加了局部平均压力。最终验证案例与目标风洞之间的比较显示，参考高度处的风场参数以及平均和峰值表面压力系数在一致范围内。这项研究的结果将有助于下一阶段对各种几何配置的 GMSP 阵列进行基准验证。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.