多孔材料对氢气爆轰的抑制作用

doi:10.11949/0438-1157.20221400

摘要/Abstract

摘要：

为了研究多孔材料对氢气爆轰的抑制作用，在内径80 mm、长6000 mm的爆轰圆管中开展2H₂+O₂+3Ar预混气爆轰传播实验。在距点火头5000 mm处放置不同孔隙密度（10、20、40 ppi）厚度30 mm的Al₂O₃泡沫陶瓷和不同厚度（10、30、50 mm）孔隙密度20 ppi的泡沫铁镍金属，分别使用压力传感器、烟膜记录爆轰波压力、胞格结构，计算爆轰波传播速度。结果表明，速度亏损和胞格尺寸随着孔隙密度或厚度的增加而增大，但是均与初始压力成反比。两种多孔材料的材料特性不同，泡沫铁镍金属具有良好的导热性，因此对爆轰波的抑制效果强于Al₂O₃泡沫陶瓷。

关键词: 泡沫陶瓷, 泡沫铁镍, 孔隙比, 抑爆

Abstract:

In order to study the inhibition effect of porous materials on the detonation propagation of 2H₂+O₂+3Ar premixed gas, series of experiments were carried out in the detonation tube. The inner diameter of tube is 80 mm and the length is 6000 mm. 30 mm thick Al₂O₃ ceramics foam with different porosity (10, 20, 40 ppi), foam iron nickel metal with different thickness (10, 30, 50 mm) and porosity of 20 ppi were placed at a distance of 5000 mm from the ignition head. The pressure sensor and smoke film are used to record the detonation wave pressure and cell structure respectively, and the detonation wave propagation velocity is calculated. The results show that the velocity deficit and cell size increase with the increase of pore density or thickness. But both are inversely proportional to the initial pressure. The material properties of the two porous materials are different. The foam iron nickel metal has good thermal conductivity. So its inhibition effect on detonation wave is stronger than that of Al₂O₃ ceramic foam.

Key words: ceramics foam, foam iron nickel, void ratio, detonation suppression

中图分类号:

TQ 028.8

赵焕娟, 刘婧, 周冬雷, 林敏. 多孔材料对氢气爆轰的抑制作用[J]. 化工学报, 2023, 74(2): 968-976.

Huanjuan ZHAO, Jing LIU, Donglei ZHOU, Min LIN. Inhibition effect of porous materials on hydrogen detonation[J]. CIESC Journal, 2023, 74(2): 968-976.

图/表 11

图1 预混气爆轰实验系统

Fig.1 Detonation experimental system of premixed gas

图2 Al2O3泡沫陶瓷（右图为显微镜下图片）

Fig.2 Al2O3 ceramics foam (the picture on the right is taken by the microscope)

图3 泡沫铁镍金属（右图为显微镜下图片）

Fig.3 Foam iron nickel metal (the picture on the right is taken by the microscope)

表1 多孔材料实验参数

Table 1 Experimental parameter of the porous material

管道	参数
光滑管	0
Al₂O₃泡沫陶瓷	30 mm	10 ppi
		20 ppi
		40 ppi
泡沫铁镍金属	20 ppi	10 mm
		30 mm
		50 mm

图4 爆轰波在不同管道内传播速度结果

Fig.4 Detonation propagation velocity in different pipelines

图5 P0=10 kPa时距点火头4000~6000 mm处光滑管的爆轰波胞格结构

Fig.5 Detonation cellular structure of smooth pipeline at 4000—6000 mm from ignition head under P0=10 kPa

图6 P0=15 kPa时放置Al2O3泡沫陶瓷管道内的爆轰波胞格结构

Fig.6 Detonation structure of pipeline laying Al2O3 ceramic foam under P0=15 kPa

图7 P0=15 kPa时放置泡沫铁镍金属管道内的爆轰波胞格结构

Fig.7 Detonation structure of pipeline laying foam iron nickel under P0=15 kPa

图8 P0=10 kPa和P0=15 kPa时放置Al2O3泡沫陶瓷管道内的爆轰波胞格结构

Fig.8 Detonation structure of pipeline laying Al2O3 ceramic foam under P0=10 kPa and P0=15 kPa

图9 不同压力下不同管道内的爆轰波胞格尺寸

Fig.9 Cell size of different pipelines under different initial pressure

图10 P0=15 kPa时不同管道内的爆轰波胞格结构

Fig.10 Detonation structure of different pipelines under P0=15 kPa

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