封闭体系内丁烷-空气预混气体爆炸的试验研究  

Experimental Study on the Explosion of Premixed Gas of Butane and Air in a Closed System

作　　者：张宇庭 徐振洋 闫祎然 宋家威 秦涛 ZHANG Yuting;XU Zhenyang;YAN Yiran;SONG Jiawei;QIN Tao(School of Mining Engineering,University of Science and Technology Liaoning,Liaoning Anshan,114051)

机构地区：[1]辽宁科技大学矿业工程学院,辽宁鞍山114051

出　　处：《爆破器材》2024年第1期51-56,共6页Explosive Materials

摘　　要：为研究不同浓度丁烷-空气预混气体在封闭管道内的燃爆特性,利用方形密闭爆炸试验管道对不同体积分数的丁烷-空气预混气体进行爆炸试验。结果表明:气体爆炸先后经历了压力上升第一阶段、压力上升第二阶段和压力下降阶段;随着丁烷气体浓度的上升,爆炸压力上升速率、最大火焰速度、火焰加速度都呈先升高、后降低的趋势;其中,当丁烷体积分数为5%时,上述参数均达到峰值;含水管道中,气相与液相的爆炸压力趋势基本一致,但相较于无水管道中的压力变化更为平缓,并且最大爆炸压力及升压速率都较低。为可燃气体燃爆问题研究提供理论参考。In order to investigate the combustion and explosion characteristics of butane-air premixed gases with various concentrations in enclosed pipelines,a square-shaped sealed experimental pipeline was utilized to conduct explosion tests on butane-air premixed gas with different volume fractions of butane.The results indicate that it goes through three stages including initial pressure rise,secondary pressure rise,and pressure decrease in gas explosion.As the concentration of butane gas increases,the increase rate of explosion pressure,maximum flame velocity,and flame acceleration all show a trend of first increasing and then decreasing.When the volume fraction of butane is 5%,the above parameters all reach their peak.In pipelines containing water,the change trends of explosion pressure in the gas phase and liquid phase are basically the same,but compared to pipelines without water,the pressure changes are smoother,and the maximum explosion pressure and pressure increase rate are lower.It provides a theoretical basis for the study on combustible gas explosion.

关 键 词：预混气体 封闭管道 爆炸压力 火焰速度 

分 类 号：TQ560.7[化学工程—炸药化工] X932[环境科学与工程—安全科学]