密闭空间在不同热环境下的火灾烟气填充特性及壁面热传导效应

Characteristics of Fuel Gas Filling and Wall Heat Transfer Effect under Different Thermal Environment of Confined Space

采用火灾数值模拟软件FDS,模拟船舶内部舱室空间处于不同热环境下的火灾烟气填充特性,发现恒温环境和低差温环境对火灾烟气的填充过程几乎没有影响,但是当密闭空间竖向差温达到一定范围时,对其填充过程影响巨大;同时通过密闭空间壁面的热传导效应的分析,不同热环境对密闭空间金属壁面的影响区域及程度均有所不同。

FDS （Fire Dynamic Simulator） was adopted to analyze the fuel gas filling features of the confined space of the ship under different thermal environment. Research showed that constant temperature environment and lower differential tempera- ture environment has little impact on the fuel gas filling process. However, it has a significant influence on the filling process when the differential thermal environment reached a certain level. The analysis of the temperature of inside wall and ceiling of the confined space showed that different thermal environment determines the wall temperature distribution.