Study on turbulent characteristics of downburst winds using computational simulation method
Thunderstorm downbursts, which are sources of extreme wind loadings in nature, have caused numerous structural failures, especially collapses of transmission tower around the world. It is important to study flow characteristics of downburst winds from the perspective of wind-resistant design for downburst-induced high intensity winds. In this paper, the turbulent characteristics of downburst winds were studied using computational simulation method. Firstly, the wind field of downburst was computational simulated using time-filtered Reynolds Averaged Navier-Stokes (RANS) numerical computational method. Then, the turbulent characteristics of downburst winds during the outbreak stage, development stage and diffusion stage, especially impinging ground stage of the whole formation and diffusion process were studied in detail. The results indicate that the turbulent characteristics of downburst winds present quite different characteristics at different time during the whole formation and diffusion process.
downburst turbulent characteristics computational simulation method numerical simulation
Baifeng Ji Weilian Qu Liang Wang
Hubei Key Laboratory of Roadway Bridge and Structure Engineering, Wuhan University of Technology Wuhan, P.R.China
国际会议
太原
英文
555-558
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）