复杂洞室群施工期通风有害气体扩散数值模拟  

Numerical simulations of ventilation to remove noxious gases during excavation of complicated tunnels

作　　者：南春子[1] 张文辉[2] 赵晓[2] 周永力[2] 马吉明[1] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084 [2]武警水电三峡工程指挥部,武汉430074

出　　处：《清华大学学报（自然科学版）》2014年第8期993-998,共6页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(51379099);水沙科学与水利水电工程国家重点实验室科研课题(2012-KY-1)

摘　　要：为了进一步认识复杂洞室群施工期联动通风中有害气体扩散的特点,该文基于流体动力学和射流理论,针对某地下洞库工程建立了湍流k-ε数学模型,模拟了压入式风机与吸出式风机联合通风、压入式风机与通风竖井联合通风这2种方案的有害气体扩散过程,得到了主洞室中不同截面CO体积浓度随时间变化的规律,分析了不同通风出口的排烟总量,比较了这2种方案的通风效果。结果表明:复杂洞室群通风中适当布置吸出式风机可提高通风效率、减轻施工巷道的排烟压力。The flow of noxious gases by ventilation during excavation of complicated tunnels was analyzed using a three dimensional k-εturbulent flow model of a current engineering project. Two ventilation schemes were simulated with a combined ventilation system using a forced fan and an exhaust fan,and a combined ventilation system using a forced fan and an air shaft.The CO volume concentration distribution with time along the tunnels was used to evaluate the ventilation effects of the two schemes.The results show that appropriate arrangement of the exhaust fan in complicated tunnels enhances the ventilation efficiency.

关 键 词：复杂洞室群施工 通风 有害气体扩散 数值模拟 

分 类 号：TV554[水利工程—水利水电工程]