The Numberical Simulation Of Downburst Based On WRF Model

The Downburst Occupies a certain percentage in the accidents of Power transmission tower collapse.In order to ensure the safety of Power transmission tower,it's necessary to study the Downburst.Wind Engineering proposed simplified downburst model.From the perspective of physical simulation and CFD simulation,a lot of scientific research has been achieved.Different from the atmospheric boundary layer,the Downburst has property of suddenness and time-domain belonged to strong Convective Meteorology.Because of the difference between the downbust and the atmospheric boundary layer,it's essential to consider Downburst from view of Meteorology.The main contents in this paper:1.Introduce the definition of Downburst and basic meteorological characteristics. This paper recommend meteorological characteristics,Mechanism and disasters concerned of Downburst.2.Introduce the current situation and the development of physical simulation and CFD simulation in Wind engineering.Including Wind profile simulated by Chay in his physical simulation and the development process of physical simulation.This paper uses FLUENT software to make CFD simulation,and compares the Wind profile obtained with Chay's.3.Introduce the Cumulus model equations and the development of Downburst Numerical Simulation.Downburst appertains to cloud-scale model,and it's control equations are cumulus model equations.There are a number of meteorological personnel engaged in compiling numerical models and simulation Research.A lot of data has been made,and this promotes the continuous development of Downburst model.4.The Numerical Simulation of Downburst based on WRF Model.Small-scale the models writed by eteorological departments are internal procedures,so when simulating Downburst,we selected mesoscale WRF model.The Mode's install operating system platform is based on LINUX OS,and Need the support of PGI, NETCDF database.We use WRF model to simulate a real DOwnburst Case Occurred in 2007 in Wuhan.