Visualization of behaviors of a propagating flame quenching for hydrogen–air gas mixture

Asano, Seiichiro; Ikeda, Syunsuke; Kagawa, Toshiharu; Youn, Chongho

doi:10.1007/s12650-009-0002-9

Cited by 10 publications

(3 citation statements)

References 10 publications

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“…Flame quenching has been studied extensively for various parameters such as pressure 1 , temperature of the gas 2 , equivalence ratio 2 , wall temperature and material 3 , and orientation of the surface, compared to the flame propagation 4,5 . The physical mechanisms responsible for flame quenching are heat loss to the surface and wall quenching of radicals.…”

Section: Introductionmentioning

confidence: 99%

Flame Quenching Dynamics of High Velocity Flames in Rectangular Cross-section Channels

Mahuthannan

Lacoste

Damazo

et al. 2017

55th AIAA Aerospace Sciences Meeting

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Understanding flame quenching for different conditions is necessary to develop safety devices like flame arrestors. In practical applications, the speed of a deflagration in the labfixed reference frame will be a strong function of the geometry through which the deflagration propagates. This study reports on the effect of the flame speed, at the entrance of a quenching section, on the quenching distance. A 2D rectangular channel joining two main spherical vessels is considered for studying this effect. Two different velocity regimes are investigated and referred to as configurations A, and B. For configuration A, the velocity of the flame is 20 m/s, while it is about 100 m/s for configuration B. Methane-air stoichiometric mixtures at 1 bar and 298 K are used. Simultaneous dynamic pressure measurements along with schlieren imaging are used to analyze the quenching of the flame. Risk assessment of re-ignition is also reported and analyzed.

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Section: Introductionmentioning

confidence: 99%

Flame Quenching Dynamics of High Velocity Flames in Rectangular Cross-section Channels

Mahuthannan

Lacoste

Damazo

et al. 2017

55th AIAA Aerospace Sciences Meeting

View full text Add to dashboard Cite

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“…Arresters are mainly composed of quenching units, shells, bolts and other accessories 14 . The quench element of the flame arrester has many holes to allow the gas to pass through, but it also needs to prevent the spread of deflagration flame and detonation flame.…”

Section: Introductionmentioning

confidence: 99%

A novel detonation arrester containing a large disk with long triangular slits: Design and numerical simulation

Yue

Long

Liu

et al. 2020

Process Safety Progress

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Aiming at the problem that common flame arresters can only extinguish deflagration flame, but cannot effectively extinguish detonation flame in large pipelines, this paper proposes a novel structure of detonation arrester based on heat transfer theory to improve the detonation flame extinguishing efficiency. The flame arresting element is composed of a large disk with long triangular slits and is used as the quenching part of detonation arrester in a monolithic structure. Compared with common flame arrester consists of several small fires retarding elements, the proposed monolithic structure is safer due to its integrity. In addition, this paper explores the relationship between flame extinguishing ability, detonation pressure, and temperature change. This investigation determined that the diameter of the quenching part and the parameters(length and height) of the long triangular slits were the key factors affecting the quenching characteristics, and as the diameter and porosity increase, the detonation pressure at the front of the flame arrester will decrease. Finally, the rationality and applicability of the structure are verified by simulation experiments. These preliminary conclusions are helpful to reveal the nature of the proposed structure and solve the technical problem of preventing detonation flame propagation of coal mine gas in large pipelines.

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“…However, in the process of gas transportation, if there are unexpected factors such as open flames or lightning strikes, the gas may be ignited or even explode, which may affect the entire pipeline system, causing huge economic losses and a large number of casualties. Therefore, the flame retardant of gas flame has become an important research topic in the safety of coal mines today [1,2,3] .…”

Section: Introductionmentioning

confidence: 99%

Simulation Study on Characteristics of Gas Combustion and Explosion in Pipeline

Guo¹,

Long²,

Yue³

et al. 2019

Proceedings of the 2019 International Conference on Electronical, Mechanical and Materials Engineering (ICE2ME 2019)

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In view of the flame retardant of gas flame in pipelines, the important topic of coal mine safety field, this paper firstly collected the state parameters of the gas flame through field test, and then used the Fluent software to simulate the state of the gas combustion explosion. By comparing the simulation results with the field test results, the error was within a reasonable range. In this way, we obtain the convincing data of characteristics of gas combustion and explosion, and find a simulation model that can replace the field test. All of these can provide more reference for research in the field of coal mine safety.

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Visualization of behaviors of a propagating flame quenching for hydrogen–air gas mixture

Cited by 10 publications

References 10 publications

Flame Quenching Dynamics of High Velocity Flames in Rectangular Cross-section Channels

Flame Quenching Dynamics of High Velocity Flames in Rectangular Cross-section Channels

A novel detonation arrester containing a large disk with long triangular slits: Design and numerical simulation

Simulation Study on Characteristics of Gas Combustion and Explosion in Pipeline

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