中国安全科学学报 ›› 2022, Vol. 32 ›› Issue (10): 100-106.doi: 10.16265/j.cnki.issn1003-3033.2022.10.0138

• 安全工程技术 • 上一篇    下一篇

NSSs和MAAs的抑爆性能对比分析

于洋洋1,2(), 刘乐海2, 张俊红1,2,**(), 季宁1, 孟祥德1, 周天意2   

  1. 1 天津仁爱学院 机械系,天津 301636
    2 天津大学 内燃机燃烧学国家重点实验室,天津 300072
  • 收稿日期:2022-04-20 修回日期:2022-08-15 出版日期:2022-10-28 发布日期:2023-04-28
  • 通讯作者: 张俊红
  • 作者简介:

    于洋洋 (1989―),男,天津人,硕士,讲师,主要从事安全工程研究。E-mail:

    季宁 副教授

    孟祥德 教授

  • 基金资助:
    天津市技术创新引导专项基金资助(20YDTPJC02020); 天津仁爱学院-天津大学发展基金资助(FZ211003)

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

YU Yangyang1,2(), LIU Lehai2, ZHANG Junhong1,2,**(), JI Ning1, MENG Xiangde1, ZHOU Tianyi2   

  1. 1 Department of Machinery, Tianjin Ren'ai College, 301636 Tianjin, China
    2 State Key Laboratory of Engines, Tianjin University, 300072 Tianjin, China
  • Received:2022-04-20 Revised:2022-08-15 Online:2022-10-28 Published:2023-04-28
  • Contact: ZHANG Junhong

摘要:

为研究封闭空间内球形非金属隔片(NSSs)和铝合金金属网(MAAs)对丙烷的抑爆性能,在定容燃烧弹(CVCB)内,填充密度为45.1 kg/m3的NSSs和MAAs,预混丙烷-空气后进行爆炸试验,通过测量填充后的最大爆炸超压、最大爆炸超压的时间和最大爆炸超压降低率,重点分析比较其抑爆作用;通过火焰纹影图像计算和比较填充后的火焰前锋平均传播速度,分析湍流燃烧现象,对比不同当量比下的抑爆性能。结果表明:NSSs的抑制作用强于MAAs;随当量比的增加,NSSs和MAAs的最大爆炸压力降低率先减小后增加,火焰平均速度先增加后减小;当量比为1.0时的抑制作用比当量比为0.8、1.2、1.5和2.0时低,丙烷浓度越大,抑制作用越明显。

关键词: 球形非金属隔片(NSSs), 铝合金金属网(MAAs), 抑爆性能, 定容燃烧弹(CVCB), 当量比

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