置障管道内天然气爆炸过程微观特性数值模拟研究

发布时间：2018-05-17 14:42

本文选题：预混气体 + 火焰前锋　；参考：《工业安全与环保》2017年11期

【摘要】：为揭示障碍物对于火焰传播过程中的激励作用,采用Zimont火焰面模型对内置不同阻塞率障碍物的密闭管道内天然气-空气预混气体的燃爆过程进行数值模拟,结果表明障碍物对于天然气燃爆过程中火焰传播的激励作用明显,火焰传播经历了从层流向湍流的转变过程,70%阻塞率时激励作用达到最大,火焰前锋速度达到了1 156 m/s,管道内最大爆炸压力达到1.02 MPa;火焰传播至障碍物处时,不同阻塞率障碍物场中湍流动能峰值变化趋势基本一致,且高湍流动能区的分布与湍流动能峰值发生剧烈变化。
[Abstract]:In order to reveal the exciting effect of obstacles on flame propagation, the Zimont flame surface model is used to simulate the explosion process of natural gas / air premixed gas in a closed pipe with different blocking rates. The results show that the barrier has an obvious effect on the flame propagation in the process of natural gas explosion, and the maximum incentive effect is obtained when the flame propagates through the transition from layer to turbulence with a blocking rate of 70%. The velocity of flame front reaches 1 156 m / s and the maximum explosion pressure in the pipe reaches 1 02 MPA. When the flame propagates to the barrier, the peak value of turbulent kinetic energy in the barrier field with different blocking rates is basically the same. Moreover, the distribution of turbulent kinetic energy and the peak value of turbulent kinetic energy change dramatically.
【作者单位】：常州大学江苏省油气储运技术重点实验室;
【基金】：建筑消防工程技术公安部重点实验室开放课题(KFKT2014MS02);建筑消防工程技术公安部重点实验室开放课题(KFKT2015ZD03) 常州市科技支撑计划项目(CE20155025) 公安部科技强警基础工作专项(2014GABJC047);公安部消防局科研计划项目(2015XFR 22) 江苏省高校自然科学研究重大项目(16KJA170004)
【分类号】：TE88

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