平行窄通道爆燃火焰淬火特性研究

IF 2 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Fire and Materials Pub Date : 2023-01-18 DOI:10.1002/fam.3128
Yawei Lu, Pinkun Guo, Zhirong Wang, Xiangwen Wang, Chen Yan
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引用次数: 1

摘要

提出了一套平行窄通道连接容器爆燃火焰熄灭实验装置。研究了连接容器内爆燃火焰的淬灭效果,分析了平行窄通道对爆燃火焰的影响规律和机理。结果表明:与未平行窄通道相比,平行窄通道对火焰的传播起到了有效的抑制作用,同时也降低了爆炸强度;由于平行狭窄通道的存在,连接血管内的压力振荡现象消失。当通道间隙为0.5、1.5和3mm时,爆燃火焰被成功熄灭,而当通道间隙为6mm时,爆燃火焰被熄灭失败。平行窄通道内爆燃火焰的淬火距离和平均传播速度随通道间隙的增大而增大。当通道间隙为6 mm时,爆燃火焰完全通过平行狭窄通道,爆燃火焰的平均传播速度明显大于爆燃火焰成功熄灭时的传播速度。
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Investigation on quenching characteristics of parallel narrow channels for deflagration flames

A set of experimental equipment for quenching the deflagration flame in linked vessels with parallel narrow channels was proposed. The quenching effects of the deflagration flame in the linked vessels were investigated, the influence law and mechanism of parallel narrow channels on the deflagration flame was analyzed. The results showed that the Pmax and the (dP/dt)max at each position were both lower than without parallel narrow channels, which indicated that the propagation of flame was inhibited by parallel narrow channels effectively, and the explosion intensity was also reduced. The pressure oscillation phenomenon inside the linked vessels disappeared due to the inclusion of parallel narrow channels. The deflagration flame was successfully quenched when the channel gaps were 0.5, 1.5, and 3 mm, but failed to be quenched when the channel gap was 6 mm. The quenching distance and the average propagation velocity of the deflagration flame in parallel narrow channels increased with the increase of the channel gap. When the channel gap was 6 mm, the deflagration flame completely passed through parallel narrow channels, and the average propagation velocity of deflagration flame was significantly greater than that when the deflagration flame was successfully quenched.

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来源期刊
Fire and Materials
Fire and Materials 工程技术-材料科学:综合
CiteScore
4.60
自引率
5.30%
发文量
72
审稿时长
3 months
期刊介绍: Fire and Materials is an international journal for scientific and technological communications directed at the fire properties of materials and the products into which they are made. This covers all aspects of the polymer field and the end uses where polymers find application; the important developments in the fields of natural products - wood and cellulosics; non-polymeric materials - metals and ceramics; as well as the chemistry and industrial applications of fire retardant chemicals. Contributions will be particularly welcomed on heat release; properties of combustion products - smoke opacity, toxicity and corrosivity; modelling and testing.
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