摘要
根据渗流理论、流体力学,利用FLUENT软件模拟新型防灭火三态材料在采空区中的渗流特性,模拟对比了新型防灭火三态材料在不同速度、不同注入方式时的渗流特性。模拟结果表明,防灭火三态材料在采空区中渗流速度较小,渗流方式为辐射状渗流,最佳注入速度为0.4~0.5 m/s,最优的注入方式为三管口注入的方式。由于三态材料的堆积特性,在采空区中能向空间上方堆积,可以有效解决液态以及两相灭火材料受到采空区地势影响以及无法预防采空区上层火灾的缺点。
Based on percolation theory and hydrodynamics,FLUENT is utilized to simulate seepage characteristics of fire preventing and extinguishing tri-state materials in goaf and comparatively analyze the seepage ways in different velocity,different injection ways.The simulation results demonstrate that fire preventing and extinguishing tri-state materials have a low velocity in goaf with radial pattern seepage way; the optimal injection rate is 0. 4 to 0. 5 m / s,and the optimal injection pattern is the three nozzle injection. Because tri-state materials have an accumulation characteristic,therefore,the problems that liquid state materials and two-phase materials can be influenced by the topography and are unable to guard against upper fire can be settled effectively.
出处
《煤矿安全》
CAS
北大核心
2015年第6期171-174,共4页
Safety in Coal Mines
关键词
采空区
FLUENT
防灭火
三态材料
渗流特性
数值模拟
goaf
Fluent
fire preventing and extinguishing
tri-state material
seepage characteristic
numerical simulation
