圆管内泡沫陶瓷对瓦斯爆炸的抑制特性

为有效抑制瓦斯爆炸冲击波及火焰传播，构建大尺度圆形管道实验装置，对瓦斯预混爆炸过程中泡沫陶瓷对冲击波和火焰传播抑制特性进行研究.结果表明：泡沫陶瓷能够吸收瓦斯爆炸冲击波能量，对火焰和冲击波传播抑制效果明显，泡沫陶瓷挡板厚度及设置层数、位置是典型影响因素.挡板设置位置距点火端距离十分重要，其临界值应为起爆期间火焰传播速度达到最大值位置以内，进而实现对瓦斯爆炸传播与发展的有效抑制.对比双层和单层挡板布置的实验结果，双层布置时冲击波最大超压下降更快.但是，挡板厚度的影响并不明显.设置厚度为50 mm或30 mm的挡板时，测得最大超压的沿程衰减趋势一致，大小也很相近.

Inhibitory Characteristics of Foam Ceramics in Circular Tube on Gas Explosion

To restrain the shock wave and flame propagation of gas explosion effectively, a large scale circular pipeline experimental system for gas explosion was constructed, and the inhibitory characteristics of foam ceramics on shock wave and flame propagation during gas pre-mixed explosion were studied. The results show that foam ceramics can absorb gas premixed explosion shock wave energy, the inhibition effect of flame and shock wave propagation is obvious. The number, thickness and location of foam ceramic baffles are the key factors. The distance between the baffle position and the ignition end is very important, and its critical value should be within the maximum position of the flame propagation velocity during the detonation period to realize the effective suppression of the gas explosion propagation and development. Compared with single-layer baffle mode, the maximum overpressure of shock wave decreases faster when double-layer baffle is installed. The influence of baffle thickness is not obvious, when the baffle with a thickness of 50 mm or 30 mm is set, the attenuation trend of the maximum overpressure is consistent and the magnitude is very similar.