摘要
针对阻燃电缆等难燃材料,为研究其在外界热源条件下的火灾性能与蔓延燃烧特性,研制了基于环形加热的阻燃电缆细观燃烧特性诊断实验平台。该平台主要包括三个部分,即:半封闭环形桶式加热与燃烧腔室、样品竖直固定模块和数据采集系统。实验参数的标定及典型阻燃电缆受热与燃烧实验结果表明,常规条件下无法点燃的阻燃电缆,当置于实验平台的加热炉内被加热一段时间后,底部小火源可将其点燃并呈现猛烈的燃烧与蔓延过程。该加热模块能够详细、准确地研究各种阻燃电缆在环形加热条件下的膨胀、引燃及蔓延燃烧的细观特性,而不同的加热模式有助于深入研究阻燃材料在各种热环境下的火灾特性,为阻燃材料的引燃机理及火蔓延模型研究提供了必要的研究平台。
Aiming at fire response behaviors of flame-retardant cables and other materials under external heating conditions,a new experimental facility was designed with an annular vertical heating and burning chamber.The facility consists of three main parts：the semi-closed annular heating and burning chamber,the sample holding model and the data acquisition system.The facility calibrations and experiments for the burning behavior of flame-retardant cables showed that the typical flame-retardant cables can be easily ignited and burn strongly in the chamber.The detailed swelling,ignition and flame spread characteristics of flame-retardant materials can be quantitatively analyzed in the new facility.In addition,various heating modes of this facility are helpful for simulating different fire scenarios,where materials might stay.It might play an important role in the study of ignition mechanism and flame spread model of flame-retardant materials.
出处
《火灾科学》
CAS
CSCD
北大核心
2017年第4期226-231,共6页
Fire Safety Science
基金
国家自然科学基金项目(51476157)
国家自然科学基金重大国际合作项目(51120165001)
上海自然科学基金项目(15ZR1408100)
关键词
阻燃电缆
环形加热
引燃
燃烧特性
Flame-retardant cables
Annular heating chamber
Ignition
Burning mechanism
