电气管廊火场模拟分析与灭火有效性试验研究

针对三种不同尺寸的电气管廊试验环境,开展实体火试验,研究引火源、电缆类型及通风风速等因素对电气管廊火灾温度特性的影响,研究表明,电缆类型及引火源对火灾发展影响较大,通风风速对火灾温度特性产生规律性影响,不同尺寸的电气管廊内温度变化不存在比例关系。细水雾灭火系统可以有效扑灭电缆发热起火及外部火引燃的火灾,数值模拟结果可以较好的预测实体火试验结果。

Study on Fire Temperature Characteristics and Fire Extinguishing Effectiveness Test of Electrical Utility Tunnel

Based on the test environment of electrical utility tunnel in three kinds of sizes,the full-scale fire tests were carried out to study the fire temperature characteristic of electrical utility tunnel in different factors such as ignition source,cable type and ventilation velocity.The results showed that cable type and ignition source had a bigger influence on fire development,that ventilation velocity had a regular influence on fire temperature characteristic,that temperature changes in utility tunnel was not in proportion to sizes.Also,it was concluded that water mist fire extinguishing system could effectively extinguish the cable fire and the fire caused by external fire,and numerical simulation could be used to predict the result of full-scale fire.