隧道集中排烟道沿程阻力系数模型  

Model test research on friction resistance coefficient for smoke extracting gallery of tunnel

作　　者：徐鹏辉[1] 刘万福[1] 倪照鹏[2] 

机构地区：[1]天津商业大学机械工程学院,天津300134 [2]公安部天津消防研究所,天津300381

出　　处：《消防科学与技术》2015年第6期734-739,共6页Fire Science and Technology

基　　金：国家"十二五"科技支撑计划项目"隧道救援站灭火技术应用研究"(2014BAK17B03)

摘　　要：结合典型隧道工程,利用相似理论建立了隧道排烟阻力试验模型,介绍隧道排烟模型试验系统的组成及沿程阻力系数的试验测定方法,利用Colebrook公式验证了该试验方法的正确性,分析排烟道壁面绝对粗糙度和漏风对沿程阻力系数测定的影响.结果表明,提出的沿程阻力系数的测试方法的试验值和理论计算值吻合较好;排烟道壁面绝对粗糙度对沿程阻力系数的影响较为显著,有效降低排烟道壁面绝对粗糙度可减小排烟阻力;排烟道漏风增加了排烟阻力,导致沿程阻力系数的测试值随着测试长度增加而增大;综合考虑多种因素,得出排烟道沿程阻力系数值范围为0.014～0.023.Based on typical tunnel engineering, the similarity theory was used to set up the test model of tunnel exhaust resistance and introduces the composition of test system for smoke extracting gallery of tunnel and the method of determination of friction resistance coefficient test. The correctness of test results were verified by the Colebrook formula,and the influence of absolute roughness and air leakage on the determination of frictional resistance coefficient was analyzed. The research results indicated that the test value of this method coinci ded with the theoretical value;Absolute roughness of smoke extracting gallery had a significant impact on friction resistance coefficient. Reducing absolute roughness effectively could re duce the exhaust resistance. Smoke evacuation leakage increased the exhaust pressure,resulting in the test value of frictional resistance coefficient increased with the test length. With a comprehensive consideration, this paper suggestd a roughness coefficient range of 0. 014-0. 023 for smoke extracting gallery.

关 键 词：隧道工程 排烟道 沿程阻力系数 模型试验 粗糙度 

分 类 号：X913.4[环境科学与工程—安全科学] TU834[建筑科学—供热、供燃气、通风及空调工程]