火灾中闭式喷头响应特性研究
中国科技大学火灾科学国家重点实验室,合肥 230027
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摘要
探讨了火灾时闭式喷头的响应时间和启动闭式喷头的临界火源功率,通过分析计算,给出了喷头启动时间与各种影响因素的拟合公式。结果表明:响应时间与安装高度、环境温度呈近似线性关系;火灾增长方式对响应时间的增长快慢产生影响;喷头的响应时间常数与响应时间则成指数关系。随着高度增加,喷头启动的临界火源功率不断增大,当喷头安装高度较高时,为早期有效的控制火灾,必须采用快速响应喷头。
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