摘要
采用实验和数值模拟对比的方法研究小尺寸管道甲烷爆炸的速度和压力特征。在距离点火端500、1 000mm处设置压力监测装置。结果表明,小尺寸管道的实验及模拟数据相吻合,压力最大值为7 000Pa,速率最大值为148m/s。压力曲线出现泄爆压力和剩余的混合气体的燃烧产生的压力两个峰值。大尺寸管道火焰结构会出现与小尺寸类似的"郁金香"火焰。
The velocity and pressure characteristics of methane explosion of small size pipe have been studied by comparison methods between experiment and numerical simulation. The pressure at 500 and 1 000 mm from the fire was tested. The re- sults showed that the simulation results were in agreement with the experiments. The max pressure was 7 000 Pa, and the max speed was 148 m/s. The pressure curve had two peaks of dis- charge pressure and burning pressure caused by excess gas mix ture. The flame structure of large size simulation presented the characteristic of ＂tulip flame＂, which had also demonstrated in small size experiments.
出处
《消防科学与技术》
CAS
北大核心
2014年第7期725-728,共4页
Fire Science and Technology
基金
国家自然科学基金资助项目(51104164)
关键词
瓦斯爆炸速度
压力特征
数值模拟
火焰传播
gas explosion velocity
pressure characteristics
numerical simulation
flame propagation
