不同迎爆面结构的泡沫金属对甲烷气体爆炸传播阻隔性能的实验研究

张保勇; 崔嘉瑞; 陶金; 王亚军; 秦艺峰; 魏春荣; 张迎新

doi:10.11883/bzycj-2021-0531

不同迎爆面结构的泡沫金属对甲烷气体爆炸传播阻隔性能的实验研究

doi: 10.11883/bzycj-2021-0531

黑龙江科技大学安全工程学院，黑龙江哈尔滨 150022

基金项目: 黑龙江省重点研发计划（GA21C023）

详细信息

作者简介:
张保勇（1982－　），男，博士，教授，byzhang1982@163.com

中图分类号: O381；X932
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- 文章访问数: 225
- HTML全文浏览量: 68
- PDF下载量: 62
- 被引次数: 0
出版历程
- 收稿日期: 2021-12-27
- 修回日期: 2022-08-06
- 网络出版日期: 2023-02-14
- 刊出日期: 2023-02-25

Experimental study on barrier performances of foamed metals with different blast front structures to prevent methane explosion propagation

Department of Safety Engineering, Heilongjiang University of Science and Technology, Harbin 150022, Heilongjiang, China

摘要

摘要: 通过自行设计的爆炸管网设备进行实验，提出通过改变泡沫金属迎爆面的结构来增大与爆炸火焰的接触面积，结合爆炸超压、火焰传播速度和火焰温度等参数来评价不同迎爆面设计结构的泡沫金属的阻隔爆性能。结果表明，在相同厚度的前提下，在材料迎爆面增加一定的锯齿形波纹会使整体的阻隔爆性能有所提升，爆炸超压、火焰传播速度和火焰温度的衰减率随着迎爆面锯齿角度的减小而增大。当泡沫金属迎爆面锯齿角度为30°时，爆炸超压、火焰传播速度和火焰温度的衰减率分别为74.0%、76.18%和91.93%，爆炸超压下降速率为30.76 MPa/s，材料后端熄爆参数为17.68 MPa·℃，阻隔爆效果较好。
- 气体爆炸 /
- 泡沫金属 /
- 迎爆面结构 /
- 阻隔爆 /
- 衰减率
Abstract: The shock waves and flame produced by explosions of methane (CH₄) and other combustible gas explosion can cause huge casualties and property damage. Therefore, the explosion-proof isolating technologies have always been a hotspot in the fields of industrial explosion protection. Foamed metal has attracted attention as a new type of explosion-isolating material which can simultaneously block the propagation of gas explosion shock waves and flame waves. Its explosion-isolating performance is a key factor affecting its application. However, there are few researches on improving the explosion-isolating performances of materials by changing the overall structures of foamed metals. A new method was proposed to change the structure of the blast front of a foamed metal and increase the contact area of the blast front with the explosion flame, so as to improve the flame-proof performance of the foamed metal. In this experiment, the experimental material with the thickness of 20 mm was prepared by wire cutting. Under the premise of the foundation thickness of 15 mm, the explosive effect surface was prepared into serrated ripples with the thickness of 5 mm and the angles of 30°, 60° and 90°. The processed foamed metal materials with different explosive effect surfaces were installed in the diffusion pipe near the end of the experimental equipment. The sensors placed at different positions and with different distances were used to collect the relevant data, and thereby the attenuation ratios of explosion overpressure, flame propagation velocity and flame temperature were calculated. The explosion-proof performances of the foamed metal with different saw tooth angles were evaluated by combining the explosion-extinguishing parameters. The results show that under the premise of the same thickness, the increase of a certain zigzag wave on the explosive effect surface of the material will improve the overall isolating explosion performance. The attenuation ratios of explosion overpressure, flame velocity, and flame temperature increase with the decrease of the sawtooth angle. When the front surface of the foamed metal has a sawtooth of 30°, the attenuation ratios of explosion overpressure, flame velocity, and flame temperature are 74.0%, 76.18%, and 91.93%, respectively. The explosion overpressure decay rate is 30.76 MPa/s, and the explosion is extinguished at the rear end of the material. The quenching parameter at the rear-end of the material is 17.68 MPa·℃, and the isolating explosion effect is better.
- gas explosion /
- foamed metal /
- explosive effect surface structure /
- isolating explosion /
- attenuation ratio

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图 1 实验材料

Figure 1. Experimental materials

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图 2 实验设备

Figure 2. Experimental equipment

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图 3 爆炸超压随传播距离的变化

Figure 3. Explosive overpressure varied with propagation distance

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图 4 不同锯齿角度对爆炸超压的影响

Figure 4. Effect of different zigzag angles on explosion overpressure

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图 5 火焰传播速度与传播距离的关系

Figure 5. Relation of flame propagation velocitywith propagation distance

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图 6 火焰传播速度抑制效果

Figure 6. Flame velocity suppression effect

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图 7 火焰温度随火焰传播距离的变化

Figure 7. Relation of flame temperaturewith flame propagation distance

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图 8 熄爆参数

Figure 8. Quenching parameters

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图 9 不同迎爆面的阻隔爆效果

Figure 9. Effect of blocking explosion of different surfaces

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表 1 实验材料迎爆面设计参数

Table 1. Design parameters of the blast front for the experimental material

实验材料体密度/(g·cm⁻³) 锯齿角度/(°) 锯齿厚度/mm 材料厚度/mm 被破坏

1 泡沫铁镍 0.5 0 0 15 是
2 30 5 15+5 否
3 60 5 15+5 是
4 90 5 15+5 是

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