单相高压与两相雾化方式对地铁车厢火灾抑制效果的对比实验研究

Comparative experimental study on the fire suppression effect of single-phase high-pressure and two-phase atomization methods in subway carriages

目前地铁车厢内细水雾灭火系统以单相高压雾化方式为主,高压管路一旦破损可对乘客生命安全构成潜在威胁。以行李袋和汽油作为燃烧物开展了全尺寸实验研究。分别从冷却能力、热辐射衰减效果及烟气抑制效果方面分析对比了单相雾化和两相雾化方式对车厢内火灾的抑制效果。结果表明单相雾化和两相雾化冷却效果相当,但两相雾化在热辐射衰减、烟气洗消效果方面较高压单相雾化更优,且安全性更好。

The existing water mist fire suppression system for metro carriages relies on a single-phase high-pressure atomization technique,and the high-pressure pipeline leakage may endanger the lives of passengers.In this research,a full-scale experimental study was conducted using luggage bags and gasoline as combustibles,thereby the impacts of single-phase atomization and two-phase atomization on the compartment were investigated and compared in terms of cooling capacity,thermal radiation attenuation,and smoke suppression.The results show that single-phase and two-phase atomization have equivalent cooling effects,while two-phase atomization outperforms high-pressure single-phase atomization in the areas of smoke suppression and thermal radiation attenuation,as well as improved safety performance.