Wind tunnel and CFD analysis of wind-induced natural ventilation in sheds roof building: impact of alignment and distance between sheds

IF 1.1 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

International Journal of Ventilation Pub Date : 2020-04-02 DOI:10.1080/14733315.2019.1615219

Marieli Azoia Lukiantchuki, Alessandra Prata Shimomura, F. Marques da Silva, R. Caram

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引用次数: 7

Abstract

Abstract Sheds roof is a natural ventilation strategy that presents roof openings working as air collectors or extractors. A detailed review of the literature indicates a lack of research analyzing the impact of different sheds roof shapes and roof configurations on natural ventilation potential. This paper aim is to evaluate the impact of changes in distance and alignment between windcatcher and leeward sheds roof. The methodology was Computational Fluid Dynamic (CFD) simulation. Tests were performed in an atmospheric boundary layer wind tunnel on a 1:15 scale model to evaluate the accuracy of CFD simulation in different design configurations of sheds roof. The analysis showed that CFD simulations are generally in good agreement with the wind tunnel tests. The difference between the most of the monitored points in the two tools used had errors below 10%. Besides this, the results show that changes in alignment of the sheds and increasing the distance between them decrease and increase the internal airflow to the leeward and windward sheds roof, respectively. In the first case it is due to the reduction in the sheds openings area. In the second these changes turn the sheds more effective in the air capture.

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棚顶建筑风致自然通风的风洞及CFD分析:排线及棚间距离的影响

棚屋屋顶是一种自然通风策略，屋顶开口作为空气收集器或提取器。对文献的详细回顾表明，缺乏分析不同棚顶形状和屋顶配置对自然通风潜力影响的研究。本文的目的是评估挡风板和背风棚屋顶之间的距离和对齐变化的影响。方法为计算流体动力学(CFD)模拟。在大气边界层风洞中进行了1:15比例尺模型试验，以评估不同棚顶设计构型下CFD模拟的准确性。分析表明，CFD模拟结果与风洞试验结果基本吻合。在使用的两种工具中，大多数监测点之间的差异误差低于10%。此外，棚架排列的改变和棚架间距的增加分别减少和增加了背风和迎风棚架屋顶的内部气流。在第一种情况下，这是由于棚子开口面积的减少。第二，这些变化使棚子在空气捕获方面更有效。

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

International Journal of Ventilation CONSTRUCTION & BUILDING TECHNOLOGY-ENERGY & FUELS

CiteScore

3.50

自引率

6.70%

发文量

审稿时长

>12 weeks

期刊介绍： This is a peer reviewed journal aimed at providing the latest information on research and application. Topics include: • New ideas concerned with the development or application of ventilation; • Validated case studies demonstrating the performance of ventilation strategies; • Information on needs and solutions for specific building types including: offices, dwellings, schools, hospitals, parking garages, urban buildings and recreational buildings etc; • Developments in numerical methods; • Measurement techniques; • Related issues in which the impact of ventilation plays an important role (e.g. the interaction of ventilation with air quality, health and comfort); • Energy issues related to ventilation (e.g. low energy systems, ventilation heating and cooling loss); • Driving forces (weather data, fan performance etc).