舰船狭长空间电缆火灾热流场特性数值研究

为研究舰船狭长空间内电缆发生火灾后的热流场特性规律,建立适用于狭长空间的火灾计算数学物理模型。对控制方程组进行简化和变形,用数值程序求解,得到狭长空间电缆火灾发生后烟气蔓延特性规律,舱内温度场分布以及随时间的变化,不同位置的火灾特征参数变化的差异性,以及典型工况下特征参数的阈值;探讨设备发热对火灾热流场的影响。通过分析火灾热流场特性变化规律,为狭长空间火灾探测设计提供参考。

Numerical research on thermal flow field characteristics of cable fires in ship's long-narrow space

In order to study the thermal flow field characteristics of fires happened in ship's long-narrow space,mathematical-physical models for fire calculation applied to long-narrow space are introduced.By adopting numerical solution algorithm to solve the simplified and transformed control-equation set,the smoke spread characters of cable fires in long-narrow space,the time-depended temperature distribution in the cabin,the diversity of fire's characteristic parameters at different locations,and the thresholds of characteristic parameters under typical circumstance are gained.At the same time,the effect of hot induced by equipment on fire thermal flow field characteristics is discussed.Ultimately,references for the design of fire detection are offered through analyzing the change rules of fire thermal flow field characteristics.