密闭增压补氧舱泄压过程中的木垛燃烧特性研究

Study on the Burning Performance of Wood Cribs During Pressure Relief Process of Closed Pressurized Oxygen-supplement Compartments

为探究增压补氧舱泄压时间对人员安全疏散的影响,通过增压补氧舱的泄压试验对舱体泄压时压力与时间的关系进行验证。对比模拟与真实泄压曲线,验证了泄压理论公式适用于增压补氧舱的泄压过程计算。模拟高海拔条件下增压补氧舱的泄压过程,结果表明:使用1个DN20、2个DN40和1个DN65规格的泄压阀可满足此类建筑安全疏散的要求。当密闭增压建筑中某房门未紧闭的标准舱室内发生4层木垛燃烧后,若能及时对建筑进行整体泄压,对标准舱外公共区域的人员疏散影响较小。研究成果可为高海拔密闭增压建筑的推广应用提供参考。

In order to investigate the impact of the depressurization time of the pressurized oxygen-supplement compartments for pedestrian evacuation,this study verified the theoretical relationship between pressure and time during cabin depressurization.Depressurization tests were conducted with pressurized oxygen-supplement compartments.From the comparison depressurization curves from experiments and simulation,it confirmed that the depressurization theory is capable to calculate the depressurization process of the pressurized oxygen supplement compartments.Furthermore,the pressure relief process of pressurized oxygen chamber at high altitude was simulated.The results showed that the use of 1 DN20,2 DN40,and 1 DN65 pressure relief valves can meet the requirements of safe evacuation of such buildings.In the case that the fuel like the 4-layer wooden in the experiment burns in a room with an open door in a closed compartment,there will be small influence on the pedestrian evacuation in the public areas outside the room,if the whole compartment can release pressure in a timely manner.The results of this study can provide reference for the application of high-altitude enclosed pressurized buildings.