...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Building and Environment >Numerical simulation for cross-ventilation flow of generic block sheltered by urban-like block array
【24h】

Numerical simulation for cross-ventilation flow of generic block sheltered by urban-like block array

机译：城市等块阵列通用块跨通风流量的数值模拟

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study reports the results of large eddy simulations with the standard Smagorinsky model of the velocity fields within a cross-ventilation model sheltered by block arrays. A very fine resolution of 1/100 of the building height was adopted. The objectives are to understand the sheltering effect of the surrounding building array and quantify the ventilation rate in the cross-ventilation model. Two types of block arrays and opening positions were simulated. Comparisons of the numerical and experimental results justify that the present simulations reproduced the characteristics of the mean as well as turbulent flows introduced in the ventilation model. In addition, the simultaneous observations of the outdoor and indoor velocities enabled us to conclude that the change in the outdoor flow patterns caused a dramatic change in the indoor velocity distributions, although the opening position was identical in all such cases. Using these detailed flow fields, we compared three types of ventilation rates: the net, gross, and instantaneous ventilation rates. Moreover, we estimated the instantaneous ventilation rate using a random variable following the Gaussian distribution. The ventilation due to the turbulent inflow was crucial in the model with its opening on the lateral side of the block, whereas the mean flow primarily determined the ventilation rate for the block with its opening on the streamwise walls. In both cases, the estimation model could predict the instantaneous ventilation rate well with a maximum overestimation of only 3%. This means that the model was justified for all the present array and opening conditions.
机译：该研究报告了大涡模拟的结果与块阵列遮蔽的横通风模型中的速度场的标准Smagorinsky模型。采用了1/100建筑物高度的非常好的分辨率。目的是了解周围建筑物阵列的避难所，并量化交叉通风模型中的通风率。模拟了两种类型的块阵列和打开位置。数值和实验结果的比较证明了本模拟在通风模型中转换了平均值的特征以及湍流的湍流流动。另外，室外和室内速度的同时观察使我们能够得出结论，室外流动模式的变化导致室内速度分布的显着变化，尽管在所有这种情况下开口位置相同。使用这些详细的流场，我们将三种类型的通风率进行比较：净，粗略和瞬时通风率。此外，我们估计了高斯分布后随机变量的瞬时通风速率。由于湍流流入引起的通风在模型中具有至关重要的，其开口在块的侧面上，而平均流程主要确定块的通风速率，其在流动壁上的开口。在这两种情况下，估计模型可以预测瞬时通风率，最大限度地高估仅3％。这意味着该模型对于所有当前阵列和开放条件都是合理的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

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