滑移多孔介质下甲烷爆炸特性研究

Study on Methane Explosion Characteristics in Sliding Porous Media

为探究降低可燃气体燃爆危害及后果的技术及方法,本文基于多孔介质的淬火降压特性,开展当量比为1时9.5%甲烷/空气预混气体在滑移多孔介质初始位置70cm下的爆炸特性实验,通过与无装置实验结论对比,结果表明:滑移装置能够延缓“郁金香形”火焰的出现时间,降低火焰最大传播速度,衰减爆炸产生的冲击波和压力,对最大火焰传播速度的衰减可达13.24%,对管内上游峰值超压的最大衰减比例为17.87%,对下游峰值超压的最大衰减比例为24.74%,本实验结果可为火焰二次加速阶段的抑制奠定一定基础。

In order to explore the technology and method to reduce the flammable gas explosion hazard and consequences, in this paper, based on the quenching and depressurization characteristics of porous media, the explosion characteristics experiment of 9.5% methane/air premixed gas at the initial position 70 cm of sliding porous media was carried out when the equivalence ratio is 1. Through the comparison with the experimental conclusion without device, the results show that the sliding device can delay the emergence time of the "tulip shaped" flame, reduce the maximum propagation speed of the flame, and attenuate the shock wave and pressure generated by the explosion;and that the attenuation of the maximum flame propagation speed can reach 13.24%, the maximum attenuation proportion of the peak overpressure in the upstream of the pipe is 17.87%, and the maximum attenuation proportion of the peak overpressure in the downstream is 24.74%. The experimental results can lay a foundation for the innovation and development of the explosion suppression technology.