Comparative analysis of explosion suppression performance of nonmetallic spherical spacers and mesh aluminum alloys

doi:10.16265/j.cnki.issn1003-3033.2022.10.0138

Abstract

Abstract:

In order to study the explosion suppression performance of NSSs and MAAs on propane in closed space. NSSs and MAAs with a density of 45.1 kg/m³ were filled in a CVCB， and the explosion test was carried out after premixed propane-air. Explosion suppression effect and contrast of NSSs and MAAs were analyzed and compared including overpressure， the maximum explosion overpressure time and the maximum explosion overpressure reduction rate. The average propagation velocity of the filled flame front was calculated and compared by flame schlieren image. the The turbulent combustion phenomenon was analyzed and the explosion suppression performance under different equivalence ratios was compared. The results showed that the effects on explosion suppression of NSSs was better than that of MAAs. With the increase of equivalence ratio， the maximum explosion overpressure reduction rate of NSSs and MAAs first decreased and then increased， and the average flame velocity of NSSs and MAAs first increased and then decreased. The suppression effect was lower under the equivalence ratio of 1 than that of another equivalence ratios （0.8， 1.2， 1.5 and 2.0）. As a result， with the concentration of propane increasing， suppression effect increased.

Key words: nonmetallic spherical spacers（NSSs）, mesh aluminum alloys（MAAs）, explosion suppression performance, constant volume combustion bomb（CVCB）, equivalence ratio

YU Yangyang, LIU Lehai, ZHANG Junhong, JI Ning, MENG Xiangde, ZHOU Tianyi. Comparative analysis of explosion suppression performance of nonmetallic spherical spacers and mesh aluminum alloys[J]. China Safety Science Journal, 2022, 32(10): 100-106.

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试验条件	数值
初始温度/K	343±2
初始压力/MPa	0.2
当量比Φ	0.8、1.0、1.2、1.5、2.0
填充密度/（kg·m^-3）	45.1
抑爆材料种类	NSSs、MAAs