舰艇舱室烟气蔓延数值模拟

假设舰艇单舱室内的烟气沉降符合双层区域模型,然后运用质量、能量守恒和气体状态方程建立舰艇内多舱室烟气蔓延模型.采用火灾发展模型对某舰艇多舱室的烟气蔓延进行数值模拟计算,得到舱室内烟气温度变化和沉降变化并与CFAST软件计算的结果进行了比较.数值计算结果与CFAST模拟计算结果的变化趋势完全一致,时间提前了约10%～15%.

Simulation of smoke spreading in vessel′s cabin

It supposed that smoke subsiding in each cabin accords with two-layer zone model and smoke spreading model for multi-cabin in vessel was set up by using mass conversation, energy conversation and gas state equation. Finally the fire-shape model was used to simulate smoke′s temperature change in the vessel′s multi-cabins. The result was compared with that computed by CFAST. The time used for computing by the model is 10%～15% ahead that by CFAST.