Experiment of Wind Field Characteristics of the Generalized Canyon Topography by Wind Tunnel Test
In order to study the wind field characteristics of canyon topography,firstly,the wind pressure or wind speed correction about the canyon topography in the four standards were compared.Secondly,taking a generalized canyon topography with a V-shaped symmetrical slope as the research object,the wind speed distribution law of the canyon topography's cross section direction and along the canyon strike were investigated through wind tunnel test,and the impact of wind direction on the canyon topography's wind speed distribution was also discussed.The findings demonstrate that there are few laws governing the correction of wind speed in canyon abroad,where the correction coefficient is set from 1.07 to 1.22 in Chinese standards.The wind speed correction coefficients are essentially symmetrical along the center axis of the canyon topography at 0° wind direction.Within the range of the test height,the acceleration area along the canyon is gradually narrowed,the deceleration area is gradually enlarged,and the maximum value of the wind speed correction coefficients are gradually reduced,and the extreme values all appear in the"H1ZX"cross section,with the values are 1.345 and 0.456 respectively.At the wind direction of 0° and 15°,along the canyon,the wind speed correction coefficients are seemed as"vortex"and"hill",respectively,and the location of deceleration area is different.At the bottom of the canyon,the wind speed acceleration impact is very limited,which only occurs close to the wind inlet location of the canyon,and the highest wind speed correction coefficient is less than 1.22 that value set in Chinese standards.
generalized canyon topographycorrection coefficientwind field characteristicswind tunnel test
NETL
NSTL
万方数据
