强施放水成膜泡沫的质量损失模型与仿真

Forceful application of mass loss model and simulation of aqueous film-forming foam

采用水成膜泡沫(AFFF)流运动和落点分布模型确定AFFF未到达火羽流前的质量损失,通过火羽流速度计算模型和质量损失临界速度建立了AFFF到达羽流上方的质量损失模型,并应用Fluent和FDS进行模拟仿真。计算结果表明:强施放水成膜泡沫的质量损失和AFFF的物化特性、流量、喷射距离、火场环境有关。该研究结论可以指导大型舰艇水成膜泡沫系统消防设计。

The model of 2D trajectories of single particles and the mutual effect model of many particles were used to determine the mass loss before AFFF reached the fire plumes. The model of plume velocity and the mass loss critical velocity were used to establish a mass loss model of AFFF which reached the fire plumes. Fluent and CFD were adopted for simulation and calculation. The calculating results show that the mass loss relates to phy-chemical characteristics, flux, trajectory distance and fire circumstance. The conclusion drawn from the research may be used for guiding fire-protection design and decision-making.