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首页> 外文期刊>International Journal of Ventilation >Urban Canyon Influence on Building Natural Ventilation
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Urban Canyon Influence on Building Natural Ventilation

机译：城市峡谷对建筑自然通风的影响

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摘要

The natural ventilation of a building, flanked by others forming urban canyons and driven by the combined forces of wind and thermal buoyancy, has been studied experimentally at small scale. The aim was to improve our understanding of the effect of the urban canyon geometry on passive building ventilation. The steady ventilation of an isolated building was observed to change dramatically, both in terms of the thermal stratification and airflow rate, when placed within the confines of urban canyons. The ventilation flows and internal stratifications observed at small scale are presented for a range of canyon widths (building densities) and wind speeds. Two typical opening arrangements are considered. Flanking an otherwise isolated building with others of similar geometry as in a typical urban canyon was shown to reverse the effect of wind on the thermally-driven ventilation. As a consequence, neglecting the surrounding geometry when designing naturally-ventilated buildings may result in poor ventilation. Further implications are discussed.
机译：通过小规模实验研究了建筑物的自然通风，其两侧形成城市峡谷，并受到风和热浮力的共同作用。目的是增进我们对城市峡谷几何形状对被动建筑通风的影响的理解。当放置在城市峡谷的范围内时，观察到隔离建筑物的稳定通风在热分层和气流速率方面都发生了巨大变化。给出了在一定范围内的峡谷宽度（建筑密度）和风速下小规模观察到的通风流和内部分层。考虑了两种典型的打开布置。与其他典型几何城市峡谷中几何形状相似的其他建筑物隔壁的建筑被证明可以逆转风对热驱动通风的影响。因此，在设计自然通风的建筑物时忽略周围的几何形状可能会导致通风不良。讨论了进一步的含义。

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