高速列车隧道内会车时气动舒适性研究

基于N-S方程及k-ε两方程紊流模型,采用有限元法对2列高速列车在隧道内交会时引起的车内压力变化及各参数对乘坐舒适性的影响进行了仿真分析.研究结果表明:2列高速列车在隧道内会车时的瞬变压力值与列车会车的地点、列车长度、列车速度及列车的密封指数均有关系,同车长、车速、密封指数的情况下,会车在隧道中部时瞬变压力变化值最大;同隧长、车速、密封指数的情况下,会车于相同地点时,较长车长的瞬变压力最大变化值要高于较短车长的;当列车的密封指数大于15s时,各种计算工况均能满足列车内瞬变压力容许值1.25kPa/3s的评价标准.

Study on aerodynamic comfort of high-speed trains passing each other through a tunnel

Based on N-S equation and k-ε two equation turbulence model,simulation analyses are conducted on pressure changes inside trains and influences of different parameters on the riding comfort when two high-speed trains passing each other through a tunnel by using finite element method.The results show that the transient pressure inside trains is influenced by the place of trains passing each other,the length of trains,the speed of trains and the sealing index.The maximum transient pressure appears when two trains passing each other in the center of the tunnel when the length of trains,the speed of trains and the sealing index are the same.And compared to the transient pressure of trains with shorter length,that of trains with longer length is larger when the place of trains passing each other,the speed of trains and the sealing index stay the same.The transient pressure inside trains can satisfy the evaluation standard of 1.25kPa/3s under various operating conditions in this paper when the sealing index is higher than 15s.