Effects of metal foam meshes on premixed methane-air flame propagation in the closed duct

Chen, Peng; Huang, Fujun; Sun, Yongduo; Chen, Xuexi

doi:10.1016/j.jlp.2017.02.015

Cited by 60 publications

(15 citation statements)

References 23 publications

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“…The temperature variation for 6 and 9% flames with 6 mm perforated metal steel installed. The temperature measured encompasses similar trends as the previous runs presented in Figures 9 and 10 but TC-1s recorded the maximum temperature of 148 and 257°C which then declined down as flame propagates further to about 87 and 146°C for 6 and 9% mixtures also reported by Wang and Wen (2014) and Chen et al (2017). It is observed from Figures 9 and 10 that the trends in flame temperature changes with TC-1 having maximum peak flame temperature of 148 and 257°C.…”

Section: Temperature Effectsupporting

confidence: 81%

“…Thus, attempts to reduce the risk of gas explosions and fires in these industries continue globally, and much effort and time are required in mitigating accidental gas and vapor cloud explosion (Baker et al, 2012). Additionally, when fuel gas accidentally ignites in conduits, it can result in explosions which, in several instances, cause a transition from deflagration to detonation (DDT), and the behavior depends on the fuel type involved in the explosion (Kundu et al, 2016;Ciccarelli and Dorofeev, 2008;Wang and Wen, 2014;Chen et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation of flame propagation mitigation using woven wire and perforated metal meshes in circular pipe

Ahmadu¹

2021

J. Petroleum Gas Eng.

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Explosions due to gas leaks from accidents and human errors are major concerns faced in natural gas and related industries. Understanding its formation and dissociation mechanisms at field conditions is keys to its successful prevention and management. In the present study, two different meshes with different sized flow channels were proposed to prevent and control methane combustion in a circular gas pipeline. The perforated metal steel of 6 mm aperture and woven wire steel mesh with 1.31 mm aperture, 0.28 mm wire diameter installed in between the flange positioned 2000 mm in a 6300 mm horizontal circular pipe were used. The effects of propagated flame flow temperature variation and equivalence ratio on wire gauze combustion have been investigated and analyzed experimentally. Methane-air mixture at variable concentrations within the lower and upper flammability ranges of 6 and 9% were used in creating an explosive mixture through the pipe length. The parameters investigated were measured and recorded. The results indicated that the inflated period for methane-air concentrations and mesh sizes varied significantly with time. The wall temperature decreased with a decrease in mesh size. The woven wire and perforated plate on flame propagation showed greatly the mitigating capability of the meshes, with a flame temperature declining tremendously. Therefore, woven wire and perforated sheets installed in gas pipelines can reduce explosion risks efficiently and effectively. However, woven wire mesh is preferable because it declines the flame temperature compared to the perforated metal mesh.

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Section: Temperature Effectsupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Experimental investigation of flame propagation mitigation using woven wire and perforated metal meshes in circular pipe

Ahmadu¹

2021

J. Petroleum Gas Eng.

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“…The measurements were obtained in the empty channel, where no porous media exist, to investigate the suppressing performance. 15 We can find that the flame shape changes experience similar development both in the empty channel and in the channels with porous meshes from Figure 1 .…”

Section: Resultsmentioning

confidence: 68%

Effect of Metal Foam Mesh on Flame Propagation of Biomass-Derived Gas in a Half-Open Duct

Wang

Zhu

et al. 2020

ACS Omega

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The effect of metal foam mesh on flame propagation of biomass-derived gas in a half-open duct was studied. The explanations are based essentially on the experimental investigations of premixed biomass-derived gas explosions carried out in a rectangular half-open combustion chamber. The initial temperature T 0 and pressure P 0 were 300 K and 1.0 atm, respectively. The key parameters of explosive characteristics, such as flame propagation images and explosive overpressure, were analyzed by changing the porosity, the pore density of porous metal foams, and the gas components. The results show that the use of porous metal foam has a significant inhibitory effect on the gas explosion. Although the combustion structure of the flames is similar, the action of the porous metal foam during the experiment also shows the characteristics consistent with the obstacles. When the porosity of the porous foam is 97%, the flame can be stimulated to produce turbulence, and then the shock–flame interaction generated by the reflection of the lead shock wave can enhance the explosion propagation and promote the explosion escalation. However, with the increase of hole density, the existence of the porous metal foam by momentum loss and heat loss to curb the spread of the explosion not only hindered the flow of not flammable but also extracted energy from the expansion of the combustion products at the same time. This study also confirms that the biological hydrogen and methane component has a vital role in the flame, and a reasonable hydrogen and methane ratio can improve the flame burning to get more economic value.

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“…e results demonstrated that powder concentration, explosion suppression dose, powder pyrolysis characteristics, and thermal decomposition products can have a different influence on gas explosion inhibition. A number of studies have been conducted to suppress gas explosion overpressure and quench flame propagation by using porous materials, including porous media [15], foam ceramics [16], wire mesh [17,18], metal foam [19,20], and combined wire mesh and foam ceramics [21,22]. e results showed that the foam iron nickel with great thickness, small aperture, and high nickel content are beneficial to the flame wave attenuation.…”

Section: Introductionmentioning

confidence: 99%

Influence of Cavity Width on Attenuation Characteristic of Gas Explosion Wave

et al. 2021

Shock and Vibration

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This study aimed to investigate the influence of cavity width on the attenuation characteristic of gas explosion wave. Attenuation mechanism of gas explosion wave through cavity was obtained by numerical simulation. The gas explosion shock wave energy can be greatly attenuated through the cavity structure in five stages, namely, plane wave, expansion, oblique reflection, Mach reflection, and reflection stack, to ensure that it is eliminated. Cavities with various width sizes, namely, 500 ∗ 300 ∗ 200, 500 ∗ 500 ∗ 200, and 500 ∗ 800 ∗ 200 (length ∗ width ∗ height, unit: mm), were experimented to further investigate the attenuation characteristics through a self-established large-size pipe gas explosion experimental system with 200 mm diameter and 36 m length. Results showed an evident attenuation effect on flame duration light intensity (FDLI) and peak overpressure with increasing cavity width. Compared with 300 mm, the overall FDLI decreased by 83.0%, and the peak overpressure decreased by 71.2% when the cavity width was 800 mm. The fitting curves of the FDLI and peak overpressure attenuation factors to width-diameter demonstrated that the critical width-diameter was 2.19 when the FDLI attenuation factor was 1. The FDLI attenuation factor sharply decreased at the width-diameter ratio range from 1.5 to 2.5 and basically remained steady at 0.17 at the width-diameter ratio range from 2.7 to 4.0. The peak overpressure attenuation factor gradually decreased with the increase of width-diameter ratio and changed from 0.93 to 0.28 with width-diameter ratio from 1.5 to 4.0. The research results can serve as a good reference for the design of gas explosion wave-absorbing structures.

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Effects of metal foam meshes on premixed methane-air flame propagation in the closed duct

Cited by 60 publications

References 23 publications

Experimental investigation of flame propagation mitigation using woven wire and perforated metal meshes in circular pipe

Experimental investigation of flame propagation mitigation using woven wire and perforated metal meshes in circular pipe

Effect of Metal Foam Mesh on Flame Propagation of Biomass-Derived Gas in a Half-Open Duct

Influence of Cavity Width on Attenuation Characteristic of Gas Explosion Wave

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