北京植物园大型热带植物温室模型的风洞实验

WIND TUNNEL EXPERIMENTS FOR PRESSURE DISTRIBUTTON ON LARGE - SCALE GREENHOUSE OF TROPICAL PLANTS IN THE BEIJING BOTANICAL GARDEN

介绍北京植物园园址的风特性模拟和新建大型热带植物温室表面风压分布的风洞实验结果。证明园址受樱桃沟谷底下洗气流影响产生局部强风区的机制，给出在不同风向下，大型温室顶部的平均风压和脉动风压均方根值分布的变化规律。

Experimental result on wind tunnel simulation of the local wind characteristics at the Beijing Botanical Garden and surface Pressure distribution measurements on the l/l00 model of the Large- scale Greenhouse of Tropical Plants there are introduced in this paper. A mechanism on the local strong wind area around the green house generated under the effect of the downwash flow in the bottom of the Cherry Valley has been demonstrated and the variation of pressure distribution on the greenhouse in different wind directions has been indicated.