不同街谷形式對都市風場之影響

本研究將探討不同街道尺度與建築物排列形式所導致之都市風場環境，因於街道進行實際量測較爲困難且耗費時間與人力，爲能考量不同環境參數可能對風場微氣候所造成之影響，本研究除利用計算流體力學(CFD)與實測數據之比較，以證明CFD於相關研究可信度之外，並利用CFD數值模擬方法進行不同街道尺度與建築排列形式之都市風場模擬，主要探討參數爲不同風速、街道尺度及建築排列形式所形成之環境風場，以了解不同街道尺度與建築排列形式之平均流速比變化，期望最終結果能成爲建築設計及都市規劃之參考依據。

關鍵字

都市風場；街道尺度；平均流速比；計算流體力學

並列摘要

The present investigation aims at exploring the urban wind environment due to the various dimensions of streets and building layouts. Such a study which involves field measurement and long term monitoring is expected and the consumption of cost is high. In order to determine the effects of several parameters which may influence the urban wind environment, CFD was employed after the validation of CFD by the comparison with field measurement results. The effects of various scales of street canyons and layouts were simulated by means of CFD and the factors studied herein include the street aspect ratio, building layout and wind speed. The average velocity ratio was used for the analysis of wind environment. Optimistically, the result obtained from this work can be useful for the architectural design and urban planning.

並列關鍵字

Urban wind environment ； urban aspect ratio ； average velocity ratio Computational Fluid Dynamics

參考文獻

BS 5925(1991)。Code of practice for ventilation principles and design for natural ventilation。London:British Standards Institution。

Google Scholar

Fazia Ali-Touder,Helmut Mayer(2006).Numerical study on the effects of aspect ration and orientation of an urban street canyon on thermal comfort in hot and dry climate.Building and Environment.41,94-108.

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