基于Pyrosim的双火源船舶火灾蔓延规律研究

A Study on the Fire Spread Pattern of Ships with Dual Fire Sources Based on Pyrosim

以典型客运船舶作为研究对象,用Pyrosim软件对双火源火灾进行仿真模拟研究,分析不同分布的点火源对火灾的蔓延规律的影响。研究发现双火源相较于单起火源会使温度和CO浓度的危险临界时间大幅度提前,而对火灾能见度影响较小。结果显示一层双火源火灾温度达到危险临界值时间比一层单起火源提前26%;同层双火源起火相较于起火源不在同一层的场景对火灾温度、CO浓度以及火灾能见度的影响也更为显著,一层多起火源的CO浓度达到危险临界值时间比其他情况提前。

This study takes a typical passenger ship as the research object,uses Pyrosim to simulate multiple ignition sources fire,and analyzes the impact of different distribution of ignition sources on the spread of fire.The results show that multiple ignition sources significantly advance the temperature and carbon monoxide concentration to dangerous critical values compared with a single ignition source,but the fire visibility is less affected.Among them,the time when the visibility of a fire with multiple ignition sources on one floor reaches the dangerous critical value is 26%earlier than that of a single ignition point on one floor.A fire scenario with multiple ignition sources on the same floor also has a more significant impact on fire temperature,carbon monoxide concentration,and visibility compared with a fire scenario where the ignition sources are not on the same floor.Among them,the time when the CO concentration of multiple ignition sources in one layer reaches the dangerous critical value is earlier than in other situations.