高净空场所自动喷水灭火系统洒水喷头动作时间研究

Actuation time of auto sprinklers at high ceiling clearance facilities

为研究非仓库类高大净空场所自动喷水灭火系统洒水喷头的动作性能,按照模拟真实场所的场景布置,采用单层标准燃烧物组合替代实际场所中的燃烧物,进行了单层标准燃烧物组合的热量标定试验。通过采用实体试验、数值模拟和羽流模型计算相结合的方法,对18m高净空场所在单层标准燃烧物组合布置情况下的喷头动作性能进行了计算分析。计算结果显示,喷头预计会在8min^10min内动作,动作时间处于火灾稳定增长阶段范围内。对于此类场所设置的自动喷水灭火系统,其功能应以保护建筑结构为主,并为人员疏散和消防队员扑救赢得时间。

Calorimetric test of single layer TFRI Standard Plastic Commodities used to represent combustibles in real scenarios was conducted to investigate the actuation performance of auto sprinkler in non-storage high-ceiling-clearance occupancies.Full scale fire test,numerical simulation and fire plume computation were performed to examine the sprinkler actuation performance under the 18-meter clearance height.Computation results show that the sprinkler is estimated to start up at the 8th to 10th minute,which is in the stable fire growth stage.Installing auto sprinkler system in this kind of facilities is mainly for protecting the building structures and saving time for evacuation and fire fightings.