火灾科学
火災科學
화재과학
FIRE SAFETY SCIENCE
2015年
1期
47-51
,共5页
籽棉%皮棉%阴燃%对比%火灾危险性
籽棉%皮棉%陰燃%對比%火災危險性
자면%피면%음연%대비%화재위험성
Unginned cotton%Lint cotton%Smolder%Contrast%Fire risk
分别对具有相同尺寸、相同质量的籽棉和皮棉进行阴燃实验并对实验结果进行对比分析，得到在无外部辐射热源的自然条件下，发生阴燃时皮棉的温升速率较大、阴燃最高温度较高、阴燃前期600 s内的CO生成速率和质量流量较大，但籽棉的阴燃时间较长，约为皮棉阴燃时间的4倍；同时将阴燃分为三个阶段，在阴燃的缓慢发展阶段和衰减阶段，籽棉阴燃的火灾危险性较大，在快速发展阶段，皮棉阴燃的火灾危险性较大。
分彆對具有相同呎吋、相同質量的籽棉和皮棉進行陰燃實驗併對實驗結果進行對比分析，得到在無外部輻射熱源的自然條件下，髮生陰燃時皮棉的溫升速率較大、陰燃最高溫度較高、陰燃前期600 s內的CO生成速率和質量流量較大，但籽棉的陰燃時間較長，約為皮棉陰燃時間的4倍；同時將陰燃分為三箇階段，在陰燃的緩慢髮展階段和衰減階段，籽棉陰燃的火災危險性較大，在快速髮展階段，皮棉陰燃的火災危險性較大。
분별대구유상동척촌、상동질량적자면화피면진행음연실험병대실험결과진행대비분석，득도재무외부복사열원적자연조건하，발생음연시피면적온승속솔교대、음연최고온도교고、음연전기600 s내적CO생성속솔화질량류량교대，단자면적음연시간교장，약위피면음연시간적4배；동시장음연분위삼개계단，재음연적완만발전계단화쇠감계단，자면음연적화재위험성교대，재쾌속발전계단，피면음연적화재위험성교대。
In this work ,the smoldering of lint cotton and unginned cotton with the same size and mass has been studied by experimental means . The result showed that under the natural environment with no radiation , lint cotton held higher temperature rising rate ,maximum temperature and CO production rate in the early stage 600 s ,however unginned cotton held four times as long as the smoldering time of lint cotton .The smoldering process was divided into three stages .It was found that in the slow developmental stage and decay stage ,the smoldering fire risk of unginned cotton is higher ,while in the rapid development stage ,the lint cotton involves higher fire risk .
