| 瓦斯爆炸数值模拟研究 |
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| 引用本文： | 王磊,司荣军,张延松,韩丽丽.瓦斯爆炸数值模拟研究[J].矿业安全与环保,2009,36(Z1). |
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| 作者姓名： | 王磊 司荣军 张延松 韩丽丽 |
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| 作者单位： | 1. 煤炭科学研究总院重庆研究院,重庆,400037
2. 北京科技大学,土木与环境工程学院,北京,100083 |
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| 摘 要： | 对瓦斯爆炸传播进行了理论分析,并借助通用CFD软件模拟了点火源球形压力波的传播过程以及压力波的反射与相交;模拟了直管道以及变截面管道压力波传播过程。发现在压力波的相交处会出现局部高压,而压力波的不断叠加使弱压缩波成为激波。前驱冲击波会随着不断传播而逐渐衰竭,当火焰阵面追上前驱冲击波阵面达到同步时,会形成爆轰波,而爆轰波的压力值与传播速度均有大幅提高。还验证了在截面积突然缩小时,火焰传播的最大速度不在截面突然缩小处,而是向后推移了一段距离;这是因为最大湍流度不是在截面突然缩小处,而是向后推移至某一断面,这也反映了湍流对瓦斯爆炸传播的影响。通过数值模拟也发现通用CFD软件在计算爆炸场时,其收敛性与稳定性方面仍然有待提高。
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| 关 键 词： | 瓦斯爆炸 数值模拟 压力波 湍流 |
Study on Numerical Simulation of Gas Explosion |
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| WANG Lei,SI Rong-jun,ZHANG Yan-song,et al.Study on Numerical Simulation of Gas Explosion[J].Mining Safety & Environmental Protection,2009,36(Z1). |
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| Authors: | WANG Lei SI Rong-jun ZHANG Yan-song |
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| Affiliation: | WANG Lei,SI Rong-jun,ZHANG Yan-song,et al |
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| Abstract: | In this paper,theoretical analysis on gas explosion propagation was carried out.The propagation process of ignition source sphere pressure wave and the reflection and superimposition of pressure wave were stimulated with the aid of the universal CFD software.The propagation process of pressure wave in straight pipeline and cross-section-variable pipeline was also stimulated.It was found that partial high pressure appeared in the intersect region of the pressure wave and the unceasing superimposition of pres... |
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