摘要
甲烷(CH_(4))是天然气的主要成分之一,具有易燃、易爆的特性,CH_(4)燃爆会引发严重后果,故需要使用有效的抑爆技术降低其燃爆危害性。本文采用流体动力学软件,选择CH_(4)体积分数为10%的CH_(4)-空气混合气体为研究对象,探讨不同水雾粒径、初始入射速度以及喷射时间等因素对CH_(4)-空气混合气体燃爆抑制效果的影响。结果表明,在10~150μm的水雾粒径范围内,70μm粒径的水雾对CH_(4)-空气混合气体的燃爆抑制效果最佳,可将CH_(4)-空气混合气体燃爆压力降至0.220 MPa,压力上升速率降至0.86 MPa/s,191 ms就能将混合气体燃爆温度降至500 K以下。此外,随着水雾入射初速度增大、喷射时间提前,水雾对CH_(4)-空气混合气体燃爆抑制效果增强。
Methane(CH_(4))is one of the primary components of natural gas,with flammable and explosive properties.CH_(4)explosions will lead to severe consequences,therefore,effective explosion suppression techniques are essential to mitigate its associated hazards.The CH_(4)-air mixture with CH_(4)volume fraction of 10%was selected to investigate,the effects of different water mist particle size,initial injection velocity,and injection time on the suppression of CH_(4)-air mixture explosion were investigated using a fluid dynamics software.The results indicate that when the particle size range is 10~150μm,the water mist with a particle size of 70μm has the best suppression effect on CH_(4)-air mixture explosion.The explosion pressure of CH_(4)-air mixture can be reduced to 0.220 MPa,and the pressure rise rate can be reduced to 0.86 MPa/s.The explosion temperature of CH_(4)-air mixture can be reduced to below 500 K within 191 ms.In addition,as the initial velocity of water mist increases and the injection time advances,the suppression effect of water mist on CH_(4)-air mixture explosion is enhanced.
作者
王慧男
刘逸夫
张添淇
杨子诺
袁治雷
梁凯丽
刘洋
胡立双
WANG Huinan;LIU Yifu;ZHANG Tianqi;YANG Zinuo;YUAN Zhilei;LIANG Kaili;LIU Yang;HU Lishuang(Shanxi North Xing’an Chemical Industry Co.,Ltd.,Taiyuan 030008,China;CRRC Dalian Institute Co.,Ltd.,Dalian 116000,China;School of Environment and Safety Engineering,North University of China,Taiyuan 030051,China;Shanxi Jiangyang Xing’an Industrial Explosive Materials Co.,Ltd.,Taiyuan 030041,China)
出处
《中北大学学报(自然科学版)》
2025年第6期784-792,共9页
Journal of North University of China(Natural Science Edition)
基金
山西省高等学校科技创新项目(2019L0517)
山西省基础研究计划资助项目(202203021212160)。
关键词
甲烷
气体爆炸
抑爆
燃爆
水雾
methane
gas explosion
explosion suppression
deflagration
water mist
