摘要
由于通风不畅,深埋长隧道中高速列车能耗与空调及隧道中各种电力设备所散发产生的大量热量不能及时排出,会造成隧道内环境温度的持续上升。本文应用三维可压缩流体流动理论,针对列车横截面积与隧道横截面积比值阻塞比的不同,对长隧道内运行的高速列车进行了数值模拟研究,计算了车头车尾的压差阻力,车身表面的摩擦阻力及列车克服全部阻力高速运行所需能耗产生的热量,结合列车辅助设备发热,并考虑隧道与围岩之间的热传递,合理预测了不同阻塞比下高速列车运行引起的隧道内温度升高以及隧道内温度随时间的变化,可为深埋特长高速铁路隧道的设计与通风提供有益的参考。
Because of bad air ventilation, a significant amount of thermal energy from aerodynamic power, air conditioning and auxiliary equipment will not be driven out timely in deep buried long tunnel. As a consequence, the temperature in tunnel would be continual rising. For ensuring security and stability of tunnel structure and normal use of the facilities, a simulation of high-speed train traveling through a deep buried long tunnel has been made. The ob- ject of this paper is to present a generalized three-dimensional flow theory which is capable of modeling the effects of interested objects in the tunnel environment. According to the different cross-sectional area ratio of train to that of tun- nel, the pressure drag between train nose and train tail, friction drag on train body and the quantity of heat produced by the energy-consuming for working of train against all resistance are evaluated in terms of different blockage ratio. The heating of train drag, train wall friction, auxiliary equipment, train equipment, train braking and pantograph e- lectric arc etc. has also been comprehensively considered, and the energy loss of heat conduction introduced by tun- nel wall has been taken into account. The temperature rising and variation with time in the tunnel is predicted and the result can serve as a useful reference for design and ventilation of such kind of tunnel .
出处
《地下空间与工程学报》
CSCD
北大核心
2011年第1期87-92,共6页
Chinese Journal of Underground Space and Engineering
基金
国家自然科学基金资助项目(50678076)
甘肃省自然科学基金(0710RJZA050)
高等学校博士点专项科研基金(20080732002)
关键词
高速列车
长大隧道
阻塞比
温度升高
high-speed train
long tunnel
blockage ratio
temperature field
