技术中心

【英文篇名】 Numerical studies on ventilation modes in underground railway tunnel fire 【作者中文名】 周孝清; 赵相相; 丁云飞; 郑志敏; 【作者英文名】 Zhou Xiaoqing~★Guangzhou University; Guangzhou; China; Zhao Xiangxiang; Ding Yunfei and Zheng Zhimin; 【作者单位】 广州大学; 【文献出处】 暖通空调, Heating Ventilating 通风排烟模式; 临界风速; 联络通道; 【英文关键词】 underground railway tunnel fire; ventilation and smoke extraction mode; critical velocity; connected tunnel; 【摘要】 介绍了地铁区间隧道火灾常见的几种通风排烟模式,对其中一种最复杂的模式进行了数值分析。模拟分析得出,对于地铁实际工程中的单线盾构圆形隧道,在10 MW火灾强度下,着火区间隧道内2.6~2.9 m/s左右的纵向风速可以有效阻止烟气发生逆流;在着火区间隧道2.9 m/s的纵向风速下,未着火区间隧道两端对送送风速度为1~1.5 m/s时,联络通道内有风速为6 m/s左右的气流流向着火区间隧道,可有效抑制烟气通过联络通道向未着火区间隧道蔓延,保证人员的安全疏散。 【英文摘要】 Presents several ordinary ventilation and smoke extraction modes,and simulates the most complex one of them.The results show that for the single-track shield tunnel in actual projects,the longitudinal ventilation velocity of 2.6~2.9 m/s can effectively prevent smoke from counter flow at a heat release rate of 10 MW;when the tunnel sector on fire with a longitudinal velocity of 2.9 m/s and the unfired tunnel sector with the velocity of 1~1.5 m/s from both ends,there is an air flow with the velocity of 6 m/s ... 【基金】 国家自然科学基金资助项目(编号:50378022)