STUDY ON WIND TUNNEL TEST OF WIND ENVIRONMENT UNDER THE INFLUENCE OF MULTIPLE FACTORS

At present, due to the limitations of test size and test equipment, it is hard to obtain wind environment with high-accuracy and detailed wind field distribution by wind tunnel tests. Besides, the research on urban wind environment is relatively lagging behind in China, which impedes the rapid social development. The present paper performs a case study of Tongyong Shidai international community. A 10 m (width)×3 m (height)×21.0 m (long) wind tunnel is employed to obtain the detailed wind field distribution. And the impact factors, such as the inflow boundary, wind speed, wind direction angle, adjacent high-rise buildings and vegetation, are considered. The research results show that the uniform inflow and C-type geomorphic inflow can generate the same average wind profile, but turbulence intensity profiles are different. The flow field inside the community has some disturbance under low inflow velocity. As the inflow velocity is greater than 7 m/s, the flow field distribution tends to be stable. The shape of the adjacent high-rise buildings will change the residential area's wind field; Vegetation can reduce the average wind speed of pedestrian height. For the considered community, the large, medium and small size trees can reduce the average wind speed by 12.8%、10.6% and 7.2%, respectively.