分散用火建筑热探测器响应温度数值模拟研究  

Numerical simulation study on response temperature of temperature detectors for building using decentralized fire

作　　者：田水承 张成镇[1,2] TIAN Shuicheng;ZHANG Chengzhen(College of Safety Science and Engineering, Xi＇an University of Science and Technology, Xi＇an Shaanxi 710054, China;Key Laboratory of Western Mines and Hazard Prevention, Ministry of Education of China, Xi＇an Shaanxi 710054, China)

机构地区：[1]西安科技大学安全科学与工程学院,陕西西安710054 [2]西安科技大学教育部西部矿山开采及灾害治理重点实验室,陕西西安710054

出　　处：《中国安全科学学报》2018年第3期56-61,共6页China Safety Science Journal

摘　　要：为合理选择、设置分散用火建筑物天花板内的热探测器,确定其测量响应温度数值,采用PyroSim软件建立分散用火建筑模型;在模型天花板平面内布置一系列用于测量温度的热电偶,在热释放速率（HRR）为1、5、10、20、30 k W/m^2,天花板高度为3、5、7m的条件下分别进行15次数值模拟,并处理、分析、拟合模拟数据;最后,考虑室内全年最高温度及安全温度,提出分散用火建筑物内热探测器报警温度的计算公式。研究表明：分散用火建筑物天花板平面内温度分布均匀,温度与HRR有显著的二次函数关系;温度随高度的增加而降低,相同天花板高度差下HRR越小,温度变化幅度也越小。The paper was aimed at finding out the value of the temperature response of the temperature detector fixed on the ceiling of a building using decentralized fire,and providing a reference for the selection and setting of the temperature detector in a building using decentralized fire. A model of the building using decentralized fire was created by PyroSim software. 15 numerical simulations were carried out at the HRR of 1,5,10,20,30 k W/m^2 and the ceiling height of 3,5,7 m,the data monitored by the thermocouples in the model are processed,analyzed and fitted. Finally,after considering the maximum temperature in a building and the safety temperature,a formula was worked out for calculating the alarm temperature for the detector in decentralized fire building. The results show that there is a uniform temperature distribution in the ceiling plane of a building using decentralized fire,and there is a obvious quadratic function relation between the temperature and the HRR,that there is a negative correlation between the temperature in the ceiling plane and the ceiling height,and that the temperature variation decreases with the decrease of the HRR at the same height difference.

关 键 词：分散用火 热释放速率(HRR) 热探测器 响应温度 Pyrosim软件 数值模拟 

分 类 号：X932[环境科学与工程—安全科学]