通风环境下保温材料XPS的火灾特性

doi:10.12068/j.issn.1005-3026.2020.02.024

东北大学学报:自然科学版 ›› 2020, Vol. 41 ›› Issue (2): 287-293.DOI: 10.12068/j.issn.1005-3026.2020.02.024

通风环境下保温材料XPS的火灾特性

尚融雪¹，邹斌^{1, 2}，张培红¹，郝宇军¹

(1.东北大学资源与土木工程学院，辽宁沈阳110819；2.中国科学技术大学火灾科学国家重点实验室，安徽合肥230026)

收稿日期:2019-03-13 修回日期:2019-03-13 出版日期:2020-02-15 发布日期:2020-03-06
通讯作者: 尚融雪
作者简介:尚融雪(1987-)，女，辽宁沈阳人，东北大学讲师，博士; 张培红(1969-)，女，河南南阳人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(51804065，51774067)；中国博士后科学基金资助项目(2018M631811)；中央高校基本科研业务费专项资金资助项目(N170103007).

Fire Characteristics of Thermal Insulation Material XPS Under Ventilation Environment

SHANG Rong-xue¹， ZOU Bin^1,2， ZHANG Pei-hong¹， HAO Yu-jun¹

1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China. 2. State Key Laboratory of Fire Science， University of Science and Technology of China， Hefei 230026， China.

Received:2019-03-13 Revised:2019-03-13 Online:2020-02-15 Published:2020-03-06
Contact: SHANG Rong-xue
About author:-
Supported by:
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摘要/Abstract

摘要： 在0，0.6和1.2m/s机械通风条件下，实验研究不同火源距离和火源位置时挤塑聚苯乙烯泡沫塑料(XPS)的火灾行为、引燃特性及烟气特性.结果表明，随着风速的增大，XPS表面火焰蔓延速度逐渐增大且较早出现结焦现象.通风风速和火源位置相同时，XPS引燃时间与火源距离近线性相关；火源位于垂直墙面位置时，风速从0.6m/s增加到1.2m/s，XPS最大引燃距离从0.2m缩短至0.15m.与其他工况相比，风速为0.6m/s时，烟气温度达最大值，且氧气、二氧化碳及一氧化碳浓度变化量最小，XPS燃烧速率随着风速的增加先增大后减小；当风速较小时，氧气浓度增加对XPS燃烧起主导促进作用；随着风速的进一步增加，其热效应对燃烧的抑制作用显著增强.

关键词: 挤塑聚苯乙烯(XPS), 机械通风, 引燃特性, 火灾行为, 烟气特性

Abstract: The fire behavior， ignition characteristics and smoke characteristics of XPS(extruded polystyrene) were studied experimentally with various distances and locations of the fire source under the mechanical ventilation velocities of 0， 0.6 and 1.2m/s. The experimental results showed that the flame spreading speed on the surface of XPS gradually increased and coking appeared earlier with the increase of wind speed. The XPS ignition time were nearly linearly related to the fire source distances under the same ventilation velocity and fire source location. The maximum ignition distance of XPS decreased from 0.2 m to 0.15 m with the increase of ventilation velocity from 0.6m/s to 1.2m/s when the fire source was perpendicular to the wall. In addition， the maximum temperature of smoke and the minimum variation of the concentrations of oxygen， carbon dioxide， and carbon monoxide were obtained when the ventilation velocity reached to 0.6m/s. Therefore， the XPS burning rate increased first and then decreased with the growth of ventilation velocity. When the ventilation velocity was low， the increase of oxygen concentration promoted the XPS combustion. The thermal inhibitory influence of new air on the XPS combustion was enhanced significantly with the further increase of the ventilation velocity， thus the XPS combustion rate reduced.

Key words: objective, interval particle, intervalextruded polystyrene(XPS), ventilation velocity, ignition characteristics, fire behavior, smoke characteristics

中图分类号:

X932

尚融雪，邹斌，张培红，郝宇军. 通风环境下保温材料XPS的火灾特性[J]. 东北大学学报:自然科学版, 2020, 41(2): 287-293.

SHANG Rong-xue， ZOU Bin， ZHANG Pei-hong， HAO Yu-jun. Fire Characteristics of Thermal Insulation Material XPS Under Ventilation Environment[J]. Journal of Northeastern University Natural Science, 2020, 41(2): 287-293.

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通风环境下保温材料XPS的火灾特性

Fire Characteristics of Thermal Insulation Material XPS Under Ventilation Environment

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