摘要
为了系统性地研究瓦斯聚集巷道的几何特性和尺度对瓦斯爆炸的强度及爆炸特性的影响,本文以计算流体力学(CFD)为主要研究工具,对充满化学计量浓度的瓦斯/空气混合气体的多条虚拟巷道中产生的爆炸进行数值模拟实验.通过引入两个巷道几何特征变量HDSF和FLSF,对总共40种不同特性的巷道中发生的瓦斯爆炸特性进行了分析,阐明了巷道几何特征对瓦斯爆燃超压的影响.研究结果表明,爆炸巷道内空间的长径比越大,瓦斯产生爆轰的可能性越高.此外,巷道的截面积的增大是影响瓦斯爆燃超压的主要因素之一.
In this research,CFD tools were employed to investigate the impact more systematically.Two geometricfactors,HDSF(hydraulic diameter scaling factor)and FLSF(gas-fill length scaling factor),were used to adjustthe scale and geometrical features of the prescribed airways.The simulation results were demonstrated anddiscussed.The conclusions indicate that detonations are more likely to occur when an airway has a larger length todiameter ratio.In addition,the increase in sectional area of an airway is also a factor causing increase of deflagrationoverpressure.
作者
王亮
阙思思
Wang Liang;Que Sisi(State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing 400044,China;School of River and Ocean Engineering,Chongqing Jiaotong University,Chongqing 400037,China)
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2017年第1期47-52,共6页
Journal of Combustion Science and Technology
基金
国家自然科学基金资助项目(51504045)
中央高校基本科研业务费资助项目(106112016CDJXY24005)
关键词
瓦斯爆燃
爆轰
计算流体力学
巷道几何特征
methane explosion
detonation
computation fluid dynamics(CFD)
geometrical features of airways
