不同高度移动火源条件下隧道内无烟低温区域预测研究  

Research on prediction of smoke-free and low-temperature zone in tunnel underconditions of moving fire source at different heights

作　　者：张之豪 秦毅 朱雄[3] 鲁宁 江雯 代世梅 向月 ZHANG Zhihao;QIN Yi;ZHU Xiong;LU Ning;JIANG Wen;DAI Shimei;XIANG Yue(College of Safety Engineering,Chongqing University of Science and Technology,Chongqing 401331,China;College of Safety Engineering,China University of Mining and Technology,Xuzhou Jiangsu 221116,China;Sinohydro Bureau 11 Co.,Ltd.,Zhengzhou Henan 450001,China)

机构地区：[1]重庆科技大学安全工程学院,重庆401331 [2]中国矿业大学安全工程学院,江苏徐州221116 [3]中国水利水电第十一工程局有限公司,河南郑州450001

出　　处：《中国安全生产科学技术》2024年第5期100-106,共7页Journal of Safety Science and Technology

基　　金：重庆市自然科学基金项目(CSTB2023NSCQ-MSX0991);重庆市教委科学技术研究项目(KJQN202201523)。

摘　　要：为了得到隧道内不同高度移动火源火灾烟气的蔓延规律,采用FDS全尺寸数值模拟对隧道内移动火源火灾烟气蔓延全过程进行模拟,之后采用量纲分析的方法,分析无烟低温区域的长度与无量纲火源功率和无量纲火源移动速度之间的函数关系,对数值模拟所得数据进行处理并分析。研究结果表明:火源移动速度越快,低温无烟区长度越长,火源高度越高,低温无烟区的长度越短;低温无烟区长度与无量纲火源功率的1/3次方和无量纲火源移动速度呈非线性关系,并进一步建立隧道火灾无烟低温区长度的预测模型。研究结果可为发生火灾后人员的疏散路径规划、隧道通风系统的设计及优化提供理论支撑。In order to understand the propagation law of fire smoke in tunnel under the conditions of moving fire source at different heights,the FDS full-scale numerical simulation was used to simulate the whole process of smoke propagation in tunnel with moving fire source.Using the method of dimensional analysis,the length of smoke-free and low-temperature zone and the functional relationship between the dimensionless fire source power and dimensionless moving speed of fire source were analyzed,and the numerical simulation data was processed and analyzed.The results show that the faster the moving speed of fire source,the longer the length of smoke-free and low-temperature zone.The higher the height of fire source,the shorter the length of smoke-free and low-temperature zone.The length of the smoke-free and low-temperature zone has a non-linear relationship with the 1/3 power of dimensionless fire source power and the dimensionless moving speed of fire source,and a prediction model on the length of smoke-free and low-temperature zone in tunnel fires was established further.The research results can provide theoretical support for the evacuation path planning of personnel after fire and the design and optimization of tunnel ventilation system.

关 键 词：隧道火灾 移动火源 量纲分析 烟气演化规律 

分 类 号：X947[环境科学与工程—安全科学]