Experimental study on rooftop flow field of building based on the operation of vertical-axis wind turbines

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-05-01 DOI:10.1063/5.0205549

Jiafeng Hu, Xiangjun Wang, Hua Yang, Bin Huang

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引用次数: 0

Abstract

Vertical-axis wind turbines (VAWTs) demonstrate good adaptability for harnessing wind energy on the building rooftops. However, knowledge gaps still exist in the understanding of the wind resources on the rooftop, the operation of VAWTs, and its effect on the wind field. To add new knowledge on this subject, the operation of wind turbines modeled by the NACA0018 airfoil on the rooftop of a building is experimentally studied via wind tunnel. The results indicate that flow above the rooftop of building shows an obvious speed reduction due to the blunt body effect of the turbines, and the turbulence intensities are dramatically enhanced. The different tip-speed ratios, wind directions, and installation locations of wind turbine have significant effect on flow field on the roof. Due to the flow characteristics above the rooftop, the power spectral density of the fluctuating wind speed exhibits high energy below the top position of the VAWT on the rooftop. Additionally, the wind profiles and probability distribution of the wake of VAWTs on the rooftop are analyzed and mathematically fitted for quantifying wind field characteristics rooftop turbines on the roof. For the VAWTs investigated in this study, the impacts of the operation of VAWTs on the wind field are non-negligible on the roof of building. The findings of this study will provide valuable insights for the optimal placement of VAWTs and utilization of wind energy on the rooftops.

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基于垂直轴风力涡轮机运行的建筑物屋顶流场实验研究

垂直轴风力涡轮机（VAWT）在利用建筑屋顶风能方面表现出良好的适应性。然而，在了解屋顶风能资源、垂直轴风力涡轮机的运行及其对风场的影响方面仍存在知识空白。为了增加这方面的新知识，我们通过风洞对以 NACA0018 机翼为模型的风力涡轮机在建筑物屋顶上的运行情况进行了实验研究。结果表明，由于涡轮机的钝体效应，建筑物屋顶上方的气流速度明显下降，湍流强度显著增强。不同的风口速比、风向和风机安装位置对屋顶流场有显著影响。由于屋顶上方的流动特性，波动风速的功率谱密度在屋顶 VAWT 的顶部位置下方表现出较高的能量。此外，还对屋顶 VAWT 的风廓线和尾流概率分布进行了分析和数学拟合，以量化屋顶风机的风场特性。对于本研究调查的 VAWT，VAWT 运行对建筑物屋顶风场的影响是不可忽略的。本研究的结果将为屋顶 VAWT 的优化布置和风能利用提供有价值的见解。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.