摘要
搭建5 L圆柱形爆炸实验平台,在不同初始压力p0下,进行了球形非金属材料(SNM)、铝合金拉网材料(MAA)和聚氨酯多孔材料(PU)3种阻隔防爆材料对氢气爆炸压力影响的实验。结果表明,实验数据和拟合曲线整体呈现出倒U型,最大爆炸压力p_(max)均在氢气体积分数φ=40%时达到最大,填充阻隔防爆材料对容器底部湍流的影响更显著,底部所测p_(max)要大于侧壁和顶部。此外,3种材料对氢气/空气预混气爆炸都具有双重作用。当φ<20%时,对氢气均表现出抑制效果,抑制作用随p0的增大而减弱。由于冷壁效应和器壁效应,具有较大比表面积的PU抑制效果最佳,最小p_(max)为47 kPa,比空白组降低83.6%。当φ≥20%时,3种材料均促进氢气爆炸,促进效果随p0的增大而增强。由于材料的孔径和压缩程度均会影响容器内的湍流程度,3种材料对不同p0下p_(max)的增幅不同,p_(max)最大可增大为空白组的7.5~9.5倍。
A 5 L cylindrical explosion test platform was constructed to conduct experiments on the effects of three types of explosion-proof materials,namely spherical non-metallic material(SNM),aluminum alloy stretched mesh material(MAA),and polyurethane porous material(PU),on hydrogen explosion pressure under different initial pressures p 0.The results indicate that the experimental data and fitting curves for the material group as a whole show an inverted U-shape.The maximum explosion pressures p_(max) all reach their maximum values when the hydrogen volume fractionφ=40%.The effect of the filled explosion-proof materials on the turbulence at the bottom of the vessel is more significant,resulting in a higher measured p_(max) at the bottom than that at the side walls and top.In addition,all the three materials have a dual effect on the hydrogen-air premix explosion.Whenφ<20%,there is an inhibitory effect on hydrogen,and the inhibitory effect decreases with the increase of p 0.Due to the cold-wall effect and the vessel-wall effect,PU with larger specific surface area has the best inhibition effect,with a minimum p_(max) of 47 kPa,which is 83.6%lower than that of the control group.Whenφ≥20%,the three materials all promote hydrogen explosion,and the promotion effect is more obvious with the increase of p 0.Both the pore size and the degree of compression of the materials affect the degree of turbulence in the vessel,resulting in different increases of p_(max) at different p 0 for the three materials.The porous material has the maximum increase of p_(max) by 7.5-9.5 times.
作者
程家彭
陈清
李斌
王永旭
张丹
解立峰
CHENG Jiapeng;CHEN Qing;LI Bin;WANG Yongxu;ZHANG Dan;XIE Lifeng(School of Safety Science and Engineering,Nanjing University of Science and Technology,Jiangsu Nanjing,210094)
出处
《爆破器材》
北大核心
2025年第3期18-26,共9页
Explosive Materials
基金
江苏省科研创新计划(KYCX24_0624)。
关键词
氢气
阻隔防爆材料
初始压力
5
L圆柱形爆炸容器
爆炸压力
hydrogen
explosion-proof material
initial pressure
5 L cylindrical explosion container
explosion pressure
作者简介
第一作者:程家彭(1999-),男,硕士,主要从事气体爆炸方面的研究。E-mail:xuede@njust.edu.cn;通信作者:李斌(1984-),男,博士,副研究员,主要从事多相爆轰相关研究。E-mail:libin@njust.edu.cn。
