運用CFD進行都市通風對行人熱舒適性之影響評估

THERMAL COMFORT ASSESSMENT OF URBAN VENTILATION BY USING COMPUTATIONAL FLUID DYNAMICS

黎益肇(Yi-Chao Li) ； 方富民(Fuh-Ming Fang) ； 張仕獻(Shi-Xian Zhang) ； 張正興(Cheng-Hsing Chang)

《中國土木水利工程學刊》 31卷8期 (2019/12) Pp. 731-738

https://doi.org/10.6652/JoCICHE.201912_31(8).0006

摘要

本研究針對一處位於板橋江子翠的典型都會區，採用風洞模型試驗及數值模擬的方法探討其風環境流通效應，並評估夏季弱風期間相應戶外熱環境的行人舒適性。研究中首先進行模型縮尺為1/250的風洞試驗量測，其結果係作為風場數值模擬結果比對驗證之依據。待數值預測模式之精準度確立後，再依據模擬而得之風場結果進行研究區內行人舒適性的評估。研究結果顯示，數值模擬的運用能提供可靠的風環境細部資料，有助於戶外熱環境行人舒適性的分析。此外，經由相關研究評估方法的整合，研究中也展現了一套熱環境中行人舒適性的評估程序。在從事老舊建築區的都市更新規劃時，研究中建議的風環境分析方法當可作為爾後熱環境行人舒適性評估的重要參考。

關鍵字

都市熱環境 ； 自然通風 ； 風洞試驗 ； 數值模擬

並列摘要

By performing wind tunnel model measurements and CFD flow simulations in a designated region at Banqiao District, the local pedestrian thermal comfort was assessed. At the beginning, pedestrian wind speeds at selected locations of a 1/250 scaled model were measured and the results were used to guide and confirm those from the simulations. The results of numerical predictions were then used to perform pedestrian comfort analyses in the designated region. Results showed that CFD could be applied to provide fairly acceptable prediction wind environment data in help with the execution of thermal comfort analyses. Moreover, a procedure of thermal comfort assessments was demonstrated by an integration of the available methods from the previous related studies. In future urban planning, accordingly, similar wind environment analyses should be carried out before the reconstruction in the aged buildings area as thermal comfort is concerned.

並列關鍵字

urban thermal environment ； natural ventilation ； wind tunnel ； numerical simulation