• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文OA文献 >A venturi-shaped roof for wind-induced natural ventilation of buildings: Wind tunnel and CFD evaluation of different design configurations
【2h】

A venturi-shaped roof for wind-induced natural ventilation of buildings: Wind tunnel and CFD evaluation of different design configurations

机译：文丘里形屋顶，用于建筑物的自然通风：风洞和CFD对不同设计配置的评估

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Wind tunnel experiments and Computational Fluid Dynamics (CFD) are used to analyse the flow conditions in a venturi-shaped roof, with focus on the underpressure in the narrowest roof section (contraction). This underpressure can be used to partly or completely drive the natural ventilation of the building zones. The wind tunnel experiments are performed in an atmospheric boundary layer wind tunnel at scale 1:100. The 3D CFD simulations are performed with steady RANS and the RNG k-epsilon model. The purpose of this study is twofold: (1) to evaluate the accuracy of steady RANS and the RNG k-epsilon model for this application and (2) to assess the magnitude of the underpressures generated with different design configurations of the venturi-shaped roof. The CFD simulations of mean wind speed and surface pressures inside the roof are generally in good agreement (10-20%) with the wind tunnel measurements. The study shows that for the configuration without guiding vanes, large negative pressure coefficients are obtained, down to -1.35, with reference to the free-stream wind speed at roof height. The comparison of design configurations with and without guiding vanes shows an at least at first sight counter-intuitive result: adding guiding vanes strongly decreases the absolute value of the underpressure. The reason is that the presence of the guiding vanes increases the flow resistance inside the roof and causes more wind to flow over and around the roof, and less wind through it (wind-blocking). As a result, the optimum configuration is the one without guiding vanes. (C) 2011 Elsevier Ltd. All rights reserved.
机译：风洞实验和计算流体动力学（CFD）用于分析文丘里形状的屋顶的流动条件，重点是最窄的屋顶部分的负压（收缩）。该负压可用于部分或完全驱动建筑物区域的自然通风。风洞实验是在大气边界层风洞中以1：100的比例进行的。使用稳定的RANS和RNGk-ε模型执行3D CFD仿真。这项研究的目的是双重的：（1）评估用于此应用的稳定RANS和RNGk-ε模型的准确性，以及（2）评估文丘里形屋顶不同设计配置下产生的负压的大小。屋顶内部平均风速和表面压力的CFD模拟通常与风洞测量值吻合良好（10-20％）。研究表明，对于无导向叶片的配置，相对于屋顶高度处的自由流风速，可以获得大的负压系数，低至-1.35。带有和不带有导向叶片的设计配置的比较显示出至少乍一看违反直觉的结果：增加导向叶片会大大降低负压的绝对值。原因是导流叶片的存在增加了屋顶内部的流动阻力，并导致更多的风在屋顶上方和周围流动，而通过屋顶的风更少（挡风）。因此，最佳配置是不带导向叶片的配置。 （C）2011 Elsevier Ltd.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号