基于基元反应的气液两相协同抑爆阻燃效果分析  

Analysis of gas-liquid two-phase coordinated explosion and flame retardant effect based on fundamental reaction

作　　者：张莉聪[1] 李斯曼 ZHANG Licong;LI Siman(School of Safety Engineering,North China Institute of Science and Technology,Langfang Hebei 065201,China)

机构地区：[1]华北科技学院安全工程学院,河北廊坊065201

出　　处：《中国安全科学学报》2024年第3期101-108,共8页China Safety Science Journal

基　　金：国家自然科学基金面上项目资助(51874134);中央高校基本科研业务费(3142016004);应急管理部工业安全事故分析与监测预警重点实验室开放基金资助(F2302)。

摘　　要：为提高惰性气体-细水雾的协同抑爆阻燃效率,基于光谱试验,采用理论分析和Fluent、CHEMKIN-PRO等数值模拟方法,研究N_(2)-细水雾在不同喷射位置、不同喷射压力下,基元反应和典型自由基(H·和·OH)摩尔分数在抑爆阻燃过程中的变化。研究结果表明:交错喷射N_(2)和细水雾比对流喷射和平行喷射具有更好的协同抑爆阻燃效果;在模拟管道条件下,N_(2)和细水雾喷射压力分别达到4.5、2 MPa时才具备良好的抑爆阻燃效果,此时H·和·OH的摩尔分数最大值分别为0.0064和0.0069。根据尺度效应,喷射压力应用于实际甲烷爆炸火灾发生区域,H·和·OH摩尔分数可作为消防行业现行火灾自动灭火系统运作过程中的监测参数,以其数量变化作为灭火进程的参考。To improve the synergistic explosion suppression and flame retardant efficiency of inert gas-water mist,based on spectral experiments,theoretical analysis and numerical simulation methods such as Fluent and CHEMKIN-PRO were used to study the changes in elementary reactions and typical free radical(H·and·OH)molar fractions during the explosion suppression and flame retardant process of N_(2)water mist at different injection positions and pressures.The results showed that staggered injection of N_(2)and fine water mist had better synergistic explosion suppression and flame retardant effect than convection and parallel injections.For case of simulated pipeline,good explosion suppression and flame retardant effect were found only when the spray pressure of N_(2)and water mist was 4.5 and 2 MPa,respectively.Furthermore,the maximum value of mole fraction for H·and·OH was 0.0064 and 0.0069,respectively.The spray pressure can be applied to the actual methane explosion fire area based on scale effect.Moreover,the H·and·OH mole fractions can be used as monitoring parameters during the operation of the current automatic fire extinguishing system in the fire protection area,and their changes can be used as a reference for fire extinguishing process.

关 键 词：基元反应 气液两相 协同抑爆 阻燃效果 FLUENT 

分 类 号：X932[环境科学与工程—安全科学]