基于船用动力锂电池的氢气爆燃特性数值分析

Numerical Analysis of Hydrogen Deflagration Characteristics Based on Marine Power Lithium Battery

考虑到船用动力锂离子电池释放氢气可能引发火灾及爆炸,通过对不同浓度的小规模氢气在动力舱密闭空间的火灾爆炸进行数值模拟,得到氢气发生火灾爆炸时超压、温度及速度等爆炸特征参数的分布及随时间的变化规律,分析爆炸特征参数在水平方向和垂直方向的差异。通过计算不同浓度对火灾爆炸规律的影响,获取不同浓度下的最大超压,供船舶动力舱爆炸危害评估及相应防护系统设计参考。

Aiming at the problem of fire and explosion caused by hydrogen released from marine power lithium-ion battery,the distribution of explosion characteristic parameters such as overpressure,temperature and velocity and their variation with time were obtained by numerical simulation of small-scale hydrogen with different concentrations in the confined space of power cabin.The differences of explosion characteristic parameters in horizontal and vertical directions were analyzed.By calculating the influence of different concentrations on the fire and explosion law,the maximum overpressure under different concentrations was obtained,providing reference for the explosion hazard assessment of ship power cabin and the design of corresponding protection system.