摘要
给出了高速列车穿越横通道高速铁路并联隧道时压力变化的三维非定常黏性流场数值模拟过程,研究了两条并联隧道横通道的面积变化、位置变化和斜交方式对并联隧道及横通道内压力变化的影响规律.计算结果表明:并联隧道横通道的存在,使得隧道内压力变化的最大值降低,隧道横通道断面积越大,则最大压力梯度的降低率越小,当横通道的断面积与隧道断面积之比为0.3左右时,其降低隧道中测点的最大压力及压力梯度的效果最好;横通道对隧道的降压效果与隧道交叉方式有关,横通道与隧道的斜交方式为正交,且正交角度控制在60°左右时,横通道对隧道内的降压效果比较好.对比分析表明,当并联隧道内的横通道、竖井及避洞在隧道内的位置、断面积、长度及与隧道的斜交角度相同时,竖井的降压效果最好,横通道次之,避洞的降压效果最差.
Numerical simulations on solving a three-dimensional unsteady viscous flow field induced by a high-speed train passing through two parallel tunnels with a cross aisle connecting both tunnels are presented. Effects on pressure change in parallel tunnels and the cross aisle as cross sectional area of the cross aisle changes,the place where the cross aisle is constructed changes or the way which the cross aisle connects two tunnels changes are analyzed. The results show that the cross aisle connecting two parallel tunnels decreases the maximum value of pressure change. The decrease rate of maximum pressure gradient is less when the cross sectional area is larger. The effect on decreasing the maximum value of pressure and pressure gradient that measured at some measuring points is most significant as the ratio of the section area of cross aisle to section area of tunnel is about 0. 3. Effects that the cross aisle has on decreasing pressure in tunnels are related to the way the cross aisle connects two parallel tunnels. Effect is good when the cross aisle is orthogonal parallel tunnels and orthogonal angle is controlled to 60 degrees.Comparison results show that the shaft has the most effect on deceasing pressure when the cross aisle,shaft and refuge hole are at the same location as well as their section areas,length and orthogonal angles.Next comes the cross aisle. The refuge hole has the worst.
出处
《北京交通大学学报》
CAS
CSCD
北大核心
2015年第1期8-13,共6页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
国家"863"计划项目资助(2011AA11A103)
国家自然科学基金资助项目(51178030)
关键词
高速列车
空气动力学
并联隧道
压力波
微气压波
横通道
high-speed train
aerodynamic
parallel tunnel
compression wave
micro-compression wave
cross aisle
