侧向风速对地下硐室火灾影响的试验研究  

Experimental study on the effect of lateral ventilation speed on underground chamber fire

作　　者：姜涛 崔嵛[1] 刘国磊[1] 王有镗 刘鸿飞 JIANG Tao;CUI Yu;LIU Guo-lei;WANG You-tang;LIU Hong-fei(School of Resources and Environmental Engineering,Shandong University of Technology,Shandong Zibo 255049,China;School of Transportation and Vehicle Engineering,Shandong University of Technology,Shandong Zibo 255049,China)

机构地区：[1]山东理工大学资源与环境工程学院,山东淄博255049 [2]山东理工大学交通与车辆工程学院,山东淄博255049

出　　处：《消防科学与技术》2019年第11期1519-1522,共4页Fire Science and Technology

基　　金：国家自然科学基金资助项目（51604169）;中国科学技术大学火灾科学国家重点实验室开放课题（HZ2012-KF14）

摘　　要：采用自主设计搭建的小尺寸试验台对侧向通风条件下地下硐室火灾燃烧规律进行了研究,选取三种通风速度和三种火源功率。结果表明,在侧向风作用下硐室内火焰摆动、旋转明显,可燃气更容易被吹出造成火焰溢出燃烧现象;侧向风降低了硐室温度和促进了硐室内流场混合,风速越大硐室上部温度越低,达到轰燃的时间也越长,但侧向风造成的流场扰动缩短了大风速工况达到稳定温度的时间;在硐室下部,侧向风在前期促进了流场的扰动,且风速增大扰动增强导致硐室下部温度升高,而在后期侧向风则主要为降温作用。The self-designed small-scale test rig was used to study the burning law of underground chamber fire under lateral wind conditions.Three kinds of ventilation speeds and three fire source powers were selected.The results showed that under the effect of lateral wind,the flame swings and rotates obviously,and the combustible gas is more easily blown out to cause flame ejection phenomenon;the lateral ventilation mainly plays the role of cooling and promoting the mixing of the flow field,so the higher the wind speed,the lower the temperature of the upper part of the chamber,and the longer the time to reach the flashover,but the disturbance of the flow field allows the large wind speed conditions to reach stable temperatures in less time;in the lower part of the chamber,lateral ventilation is mainly playing the role of mixing action of the flow field in the early stage,and the higher the wind speed,the stronger the mixing effect is,as well as the higher the temperature is,while in the later stage,lateral ventilation is mainly the cooling effect on the lower part of the chamber.

关 键 词：硐室火灾 侧向风 风速 热释放速率 温度 

分 类 号：X932[环境科学与工程—安全科学] TU962[建筑科学]