建物高さ変化による密集街区の WIND TUNNEL …narita/profile/paper/2010aijg-BHD.pdf211...

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建物高さ変化による密集街区の風通しの改善に関する風洞実験

WIND TUNNEL EXPERIMENT ON THE BUILDING HEIGHT DESIGN TO IMPROVE THE VENTILATION RATE IN A BUILT-UP AREA

日本建築学会技術報告集　第16巻　第32号，211-214，2010年 2月

AIJ J. Technol. Des. Vol. 16, No.32, 211-214, Feb., 2010

成田健一　　＊1

キーワード :ヒートアイランド，蒸発，物質伝達率，換気効率，建物周辺気流

Keywords:Heat island, Evaporation, Mass transfer coefficient, Ventilation rate, Air flow around building

Ken-ichi NARITA 　＊1

In densely built-up area, the wind in the canopy layer is very weak, that causes the discomfort condition at the pedestrian level. In this paper, the possibility to improve the ventilation rate by changing the building height locally was investigated using the wind tunnel experiments. The ventilation rate in the narrow street was estimated by the mass transfer velocity in canyon wall that was measured by the originally devised water evaporation technique using filter paper. It was found that only small height change of wing-end building leads to the remarkable increase of ventilation rate over the whole traverse path.

*1 日本工業大学建築学科　教授・工博（〒 345-8501　南埼玉郡宮代町学園台 4-1）

*1 Prof., Dept. of Architecture, Nippon Institute of Technology, Dr. Eng.

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In densely built-up area, the wind in the canopy layer is very weak, that causes the discomfort condition at the pedestrian level. In this paper, the possibility to improve the ventilation rate by changing the building height locally was investigated using the wind tunnel experiments. The ventilation rate in the narrow street was estimated by the mass transfer velocity in canyon wall that was measured by the originally devised water evaporation technique using filter paper. It was found that only small height change of wing-end building leads to the remarkable increase of ventilation rate over the whole traverse path.

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建物高さ変化による密集街区の WIND TUNNEL …narita/profile/paper/2010aijg-BHD.pdf211...

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