Quenching of crimped ribbon deflagration arrestor by propane-air premixed flame
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摘要: 根据我国石油气体管道阻火器实验的国家标准(GB13347—92)，对6组ⅡA类气体波纹板阻爆燃型阻火器进行了实验探究，得到了相应的阻火速度。实验结果表明：阻火器扩张比、阻火芯狭缝通道长度以及狭缝截面形状是影响阻火速度的主要因素。通过分析以上3个因素对阻火速度的影响，得出了阻火速度与阻火器基本参数的拟合公式。结果表明：阻火速度与狭缝通道的长度、扩张比的平方成正比，与狭缝截面三角形的特征尺寸成反比。Abstract: According to the national standards of oil and gas pipeline fire test in China (GB13347—92), six DN50 crimped ribbon deflagration arrestors belonging to Group ⅡA were tested by experiments, and the flameproof velocity of every single arrestor was obtained. The experimental results show that the expansion ratio, the length of the narrow channel and the cross-section of the narrow passage are the three dominant factors that influence the flameproof velocity. Based on this analysis, the relation between the flameproof velocity and the expansion ratio, the thickness of the crimped ribbon element and the cross-section of the narrow passage were presented. The results indicate that the flameproof velocity is proportional to the length of the narrow channels and the square of expansion ratio, whereas it is inversely proportional to the feature size of the cross-section. This study can provide guidance in the design and manufacture of crimped ribbon deflagration arrestors.
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Key words:
- deflagration arrestors /
- crimped ribbon /
- flameproof velocity /
- expansion ratio /
- narrow channels
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图 2 波纹板阻火芯与狭缝示意图
Figure 2. Sketch of narrow channel of the crimped metal ribbon element
图 4 面积为$\sqrt{3}$/2mm2的活性粒子浓度云图
Figure 4. Contours of numerical concentration of active particles
图 6 阻火速度柱状图：红色代表火焰通过阻火器；绿色代表火焰未通过阻火器；蓝色代表此速度下火焰有时通过阻火器，有时不通过；黑色表示最终确定的阻火速度
Figure 6. Histogram of flame velocity to determine the flameproof velocity. Red: passed through. Green: failed to pass thourgh. Blue: Sometimes passed, sometimes failed. Black: flameproof velocity
表 1 阻火器基本参数测量结果
Table 1. Basic parameters of crimped metal ribbon elements
No. d/mm D/mm β b/mm α/(°) a/mm h/mm γ/(°) A1(B1) 50 99 1.98 15 28 2.13 0.87 39 A2(B2) 50 101 2.02 16 20 3.50 1.54 41 A3(B3) 50 145 2.90 21 29 3.57 1.48 40 
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