甲烷/煤尘混合爆炸及最大爆炸压力的预测模型
Prediction model of methane/coal dust mixture explosion and maximum explosion pressure
张迎新 1王佳伟 1唐露1
作者信息
- 1. 黑龙江科技大学 安全工程学院,哈尔滨 150022
- 折叠
摘要
为研究甲烷/煤尘两相体系潜在的爆炸风险,使用20L球形爆炸测试系统,研究了甲烷/煤尘混合物的爆炸规律及初始湍流对甲烷/煤尘混合物爆炸压力的影响.结果表明:甲烷/煤尘混合物爆炸压力主要取决于两相体系中煤尘的质量浓度,最大爆炸压力上升速率及初始爆炸压力上升速率主要取决于两相体系中的甲烷体积分数;煤尘质量浓度为350 g/m3 时,点火延迟由80 ms增加到110 ms和140 ms,爆炸持续时间增加幅度分别为67.716 5%、94.953 1%,爆炸压力减小幅度分别为14.123 5%、32.199 3%;构建了甲烷/煤尘两相体系最大爆炸压力新的预测模型,经检验后发现该模型具有较好的适用性.
Abstract
This paper aims to investigate the potential explosion risk of methane and coal dust two-phase system.The experiment using 20 L spherical explosion test system studies the explosion law behind methane/coal dust mixture and the effect of initial turbulence on the explosion pressure of methane/coal dust mixture.The results show that the explosion pressure of methane/coal dust mixture is mainly decided by the mass concentration of coal dust in the two-phase system,and the maximum explosion pressure ris-ing rate and initial explosion pressure rising rate are mainly decided by the methane volume fraction in the two-phase system;when the coal dust concentration is 350 g/m3,the ignition delay time increases from 80 ms to 110 ms and 140 ms,the explosion duration increases by 67.716 5% and 94.953 1%,and the explosion pressure decreases by 14.123 5% and 32.199 3%,respectively.The proposed new prediction model for the maximum explosion pressure of methane and coal dust two-phase system has better applica-bility after testing.
关键词
粉尘爆炸/混合物爆炸/爆炸超压预测Key words
dust explosion/mixture explosion/explosion overpressure prediction引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据