基于双层区域模型的舱室火灾模拟技术研究

Simulation of Fire in Vessel's Cabin Based on Two-layer Zone Model

为了研究舰船舱室内火灾蔓延特点,采用火灾双层区域模型实现舰船舱室火灾蔓延趋势的模拟。通过建立系统能量、质量守恒和气体状态方程、物体间的对流换热过程等,得出了更为贴近实际的单舱室和相邻多舱室火灾烟气蔓延的数学物理模型。采用数值方法实现模型的求解,并编制了舱室环境下的火灾模拟仿真程序,实现了某舰船内两相邻舱室内烟气温度和烟气层高度随时间变化的仿真过程,其模拟结果同CFAST软件的模拟结果相吻合,验证了建立模型的有效性。

In order to find out the characteristics of fire development, the two-layer zone model was used to simulate the fire in the compartments of vessels. The spreading model for the two adjacent compartments was set up by using energy conversation, mass conversation, gas state equation heat convection between objects. The numerical method was applied to solve the equation sets. Then the simulation program was set up based on the solution, which made it possible to simulate the variation of the smoke temperature and the sickness of the smoke layer. The result of the model then was compared with that of CFAST, and it turned out to be substantially agreed.