The construction of wind break walls in the gobi along railway reduced the harm for train,but the air current formed a vortex behind the wind break wall, which made a serious aeolian sands. Based on the method of fluid numerical analysis,the flow field and the aeolian sand were simulated. The factors that affect the length of the vortex and the aeolian sand were analysed,and the result obtained is that the length of the vortex increases with the growing of the highness of wind break wall and wind speed, decrease with the growing of the aspect ratio of the wind break wall and the roughness constant of the earth's surface. The mian aeolian sand distribute at the behind of the wind break wall and the end of the vortex. What the study above will provide reference for the safe operation of railway and the design of wind and sand prevention.
NETL
NSTL
万方数据
维普
