城市地下道路水幕系统挡烟效果研究  

Research on water curtain smoke blocking technology of urban underground road

作　　者：姜学鹏[1,2,3] 王宝伟 JIANG Xue-peng;WANG Bao-wei(School of Resource and Environmental Engineering,Wu han University of Science and Technology,Hubei Wuhan 430081,China;Fire Safety Technology Institute,Wuhan University of Science and Technology,Hubei Wuhan 430081,China;Hubei Provincial Industrial Safety Engineering Technology Research Center,Hubei Wuhan 430081,China)

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081 [2]武汉科技大学消防安全技术研究所,湖北武汉430081 [3]湖北省工业安全工程技术研究中心,湖北武汉430081

出　　处：《消防科学与技术》2020年第2期149-154,共6页Fire Science and Technology

基　　金：国家自然科学基金面上项目(51874213);公安部消防局科研计划项目(2016XFCX20);湖北省自然科学基金资助项目(2015CFB200);武汉科技大学青年科技骨干培育计划项目(2017XZ014)。

摘　　要：为使水幕挡烟效果定量化,通过理论分析构建以水幕动量比R、挡烟效率η为基准的水幕系统参数。采用FDS对5、10、15 MW火灾规模下,不同喷水强度和纵向风速下50个工况进行模拟计算。结果表明:R越大,挡烟效率越低;三种火源功率下最佳有效挡烟动量比分别为4.35×10^3、2.44×10^3、2.10×10^3,并从微观上(流场)验证了水幕挡烟的有效性;得到三种火源功率下,最佳喷水强度分别为2.0、2.0、2.5 L/(m·s),且水幕喷水强度增大,降温效果提高,但隧道能见度降低,挡烟效果减弱。In order to quantify the effect of the water curtain, the water curtain system parameters based on the water curtain momentum ratio R and the smoke resistance efficiency η are constructed through theoretical analysis. The FDS was used to simulate the50 sets of working conditions under different water spray intensity and longitudinal wind speed for 5 MW, 10 MW and 15 MW fire scales. The results show that the larger the momentum ratio is, the lower the smoke resistance efficiency is. Under the three fire sources of 5 MW, 10 MW and 15 MW, the best effective smoke resistance momentum ratio is 4.35 × 10^3, 2.44 × 10^3, 2.10 × 10^3, respectively. The effectiveness of the water curtain to prevent smoke is verified from the microscopic(flow field). Under the three fire sources of 5 MW, 10 MW and 15 MW, the optimal water spray intensity is 2.0 L/(m·s),2.0 L/(m·s), 2.5 L/(m·s) respectively,and the water curtain spray intensity increases, the cooling effect increases, but the tunnel visibility decreases, and the smoke blocking effect is weakened.

关 键 词：地下道路 水幕系统 动量比 挡烟效率 系统参数 

分 类 号：X924.4[环境科学与工程—安全科学] TU892[建筑科学]