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首页> 外文期刊>Building and Environment >On the estimation of wind speed in urban canyons for ventilation purposes-Part 2: Using of data driven techniques to calculate the more probable wind speed in urban canyons for low ambient wind speeds
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On the estimation of wind speed in urban canyons for ventilation purposes-Part 2: Using of data driven techniques to calculate the more probable wind speed in urban canyons for low ambient wind speeds

机译：关于用于通风目的的城市峡谷中风速的估计-第2部分：使用数据驱动技术来计算低环境风速时城市峡谷中更可能的风速

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摘要

For low ambient wind speeds, airflow in deep urban canyons is characterized by a high scatter and important fluctuation as no coupling is established between the undisturbed wind flow and the flow inside the canyon. Thus, thermal and mechanical forces determine the wind speed characteristics. Existing studies based on experimental comparison have shown that under the above boundary conditions, deterministic models may predict with sufficient accuracy the mean wind speed but not the fluctuation caused by the thermal phenomena. In the present paper, data have been collected through an extensive experimental campaign in seven canyons. Then, data driven techniques, to predict the more probable wind speed in deep urban canyons as a function of the prevailing thermal and inertia phenomena, have been developed. The proposed methodologies are strictly valid inside the limits of the experimental data, i.e. aspect ratios between 1.7 and 3.25, and can be used to estimate the more probable wind speed close to the facades of urban canyons.
机译：对于低环境风速，深市区峡谷中的气流具有高度分散和重要波动的特征，因为在原状风流和峡谷内部的气流之间没有建立耦合。因此，热力和机械力决定了风速特性。基于实验比较的现有研究表明，在上述边界条件下，确定性模型可以足够准确地预测平均风速，但不能预测由热现象引起的波动。在本文中，数据是通过在七个峡谷中进行的广泛实验活动收集的。然后，已经开发了数据驱动技术，以根据普遍存在的热和惯性现象来预测城市深处峡谷中更可能的风速。所提出的方法在实验数据的限制内（即纵横比在1.7和3.25之间）是严格有效的，并且可以用来估计靠近城市峡谷外墙的更可能的风速。

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