渐变型多孔介质中低浓度瓦斯燃烧特性数值模拟-《中国安全生产科学技术》

文章信息/Info

Title:: Numerical simulation on characteristics combustion of low concentration methane 
in a graduallyvaried porous medium

作者:: 代华明; 林柏泉; 李庆钊; 赵帅; 刘谦; （1中国矿业大学安全工程学院，徐州 221116）
（2煤炭资源与安全开采国家重点实验室，徐州 221116）
（3徐州博安科技发展有限责任公司，徐州 221008）

Author(s):: DAI Hua ming; LIN Bai quan; LI Qing zhao ; ZHAO Shuai; LIU Qian; （1. School of Safety Engineering, China University of Mining & Technology, Xuzhou 221116, China）
（2 State Key Laboratory of Coal Resources and Safe Mining, Xuzhou 221116, China）
（3 Xuzhou Boan Technology Development Co. Ltd, Xuzhou 221008, China）

Keywords:: coal mine methane; graduallyvaried porous media; homogeneous porous media; equivalence ratio; porosity; numerical simulation

摘要:: 利用模拟软件Fluent63建立二维模型并进行合理设置，对多孔介质中的煤矿低浓度瓦斯燃烧进行数值模拟，研究了均匀型和渐变型燃烧器中的温度分布和NOx生成情况，以及三种不同渐变型多孔介质组合燃烧器中的温度分布和NOx生成情况。结果表明，渐变型多孔介质燃烧器的温度分布比均匀型燃烧器更加均匀；同一瓦斯当量比和流速下，渐变型多孔介质燃烧器的NOx产生量比均匀型燃烧器低很多，有利于减少污染物排放；三种不同渐变型多孔介质组合的温度分布和NOx生成有着不同特点，燃烧器设计时，可根据不同需求选取不同组合形式，综合考虑各因素，组合一燃烧特性最佳。

Abstract:: The combustion of low concentration coal mine methane in porous media was simulated through a twodimensional model by using Fluent63 The situation of temperature distribution and NOx production in homogeneous and graduallyvaried porous media combustor were studied. Meanwhile, the same situation in three different kinds graduallyvaried porous media combustor were also studied. It was concluded that, the temperature distribution in graduallyvaried combustor is more uniform than in homogeneous combustor. The production of NOx in graduallyvaried combustor is less than in homogeneous combustor, thus, it contributes to environment. The situation of temperature distribution and NOx production in three different kinds graduallyvaried porous media combustor have different characteristics. We can select different combining form by different demands in the design of combustor, take comprehensive consideration of combustion characteristics, and the first combining form is the best combination.