管道内金属网对瓦斯爆炸冲击波抑制作用的实验研究
Experimental study on suppression effect of metal mesh in pipeline on gas explosion shock wave
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摘要: 为了研究金属网对瓦斯气体爆炸的抑制作用,设计了管道内圆柱状金属网体抑爆实验装置。通过对比空管实验与装有抑爆装置条件下爆炸冲击波的变化,分析了金属网在冲击波衰减过程中的能量变化。实验结果表明:圆柱状金属网体的长径比对冲击波有着重要的影响,且随着圆柱状金属网体长径比的增大,激波超压衰减率与之呈正相关;当长径比为1/0.2时,金属网弹性势能的增加在抑制作用中起主导作用,当长径比为2/0.2、3/0.2时,金属网内能的增加在抑制作用中起主导作用。Abstract: In order to study the inhibition effect of metal mesh on gas explosion, the explosion suppression test device of cylindrical metal mesh in pipeline was designed. The suppression effect of metal mesh on shock wave was studied by comparing the variation of shock wave overpressure under the condition of air-tube experiment and explosion suppression device. The experimental results show that the ratio of length to diameter of cylindrical metal mesh has a great influence on shock wave, and the suppression rate of shock wave is positively correlated with the ratio of length to diameter of cylindrical metal mesh. When the ratio of length to diameter of cylindrical metal mesh is 1/0.2, the increase of elastic potential energy of metal mesh plays a leading role in suppression, and the increase of energy in metal mesh plays a leading role in suppression when the ratio of length to diameter is 2/0.2, 3/0.2.
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Keywords:
- gas explosion /
- metal mesh /
- overpressure /
- attenuation /
- reflected shock wave
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