摘要
建立了以CRH3系列某型高速列车为原型的空气动力学数值模型,研究了桥梁防护墙及其结构参数对高速列车气动特性的影响.结果表明:由于防护墙的存在,使得空气在防护墙处形成绕流,同时在防护墙外壁侧形成了涡旋,涡旋不断向后发展、增大,并在中间车的后转向架与尾车的前转向架处出现耗散、脱落以及新涡旋生成的现象.绕流与涡旋的作用导致整车升力平均下降了39.25%,升力减小;并且随着防护墙高度的升高,同样导致了整车升力的减小,升力平均降低了43.77%.
The aerodynamic numerical model of a CRH3 high-speed train is established and the influence of bridge protective wall and its structural parameters on the aerodynamic characteristics of the high-speed train is studied.The results show thatthe existence of the protective wall make the air flows around the protective wall,and a vortex is formed on the side of the outer wall at the same time.The vortex develops backward and increases continuously,and it dissipates,falls off and generates new vortices in the rear bogie of the intermediate car and the front bogie of the tail car.The effect of the flow characteristcs and vortex causethe lift of the vehicle to decrease by 39.25%on average,and the lift decreases.Moreover,with the increase of the height of the protective wall,the lift force of the vehicle also decreases,with an average reduction of 43.77%.
作者
张鹏
杜礼明
ZHANG Peng;DU Liming(School of Locomotive and Rolling Stock Engineering,Dalian Jiaotong University,Dalian 116028,China)
出处
《大连交通大学学报》
CAS
2020年第6期35-40,共6页
Journal of Dalian Jiaotong University
关键词
高速列车
防护墙
数值模拟
气动特性
响应
high-speed train
protective wall
numerical simulation
aerodynamic performance
response
