Experimental study of premixed syngas/air flame deflagration in a closed duct

Yu, Minggao; Yuan, Xufeng; Zheng, Kai; Zheng, Ligang; Wen, Xiaoping

doi:10.1016/j.ijhydene.2018.05.103

Cited by 75 publications

(22 citation statements)

References 52 publications

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“…The generation of turbulence will lead to higher flame velocity and overpressure, which cause the operation of quenching in porous media to fail. 28 According to previous research, each experiment has a minimum overpressure value. If the overpressure is lowered during propagation, the flame will stop propagating forward and be extinguished.…”

Section: Resultsmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 99%

“…The left of the duct is closed with stainless half-open steel plates, in which the end of the vent is closed by the PVC membrane. 28 Moreover, it breaks up easily for safety’s sake. There is a porous foamed metal with a thickness of 50 mm, about 680 mm from the left end of the pipe.…”

Section: Experimental Apparatus and Proceduresmentioning

confidence: 99%

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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“…It has been proved that sudden deceleration of the flame occurs after the first contact with the sidewalls, resulting from the less flame surface area. 2 , 26 , 27 …”

Section: Resultsmentioning

confidence: 99%

Effect of the Inclination Angle on Premixed Flame Dynamics in Half-Open Ducts

et al. 2020

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The propagation of premix methane/air flames in long half-open ducts with different inclination angles θ between the sidewall and the horizon was numerically investigated using the laminar model. The numerical result was compared with the experimental and theoretical ones to validate the numerical model. The results show that the numerical results are in good agreement with them. The investigation provides the basic understanding of the effects on changing the shape of the ducts to promote the premixed flame combustion. For methane/air, the position where the flame front begins to concave is pushed back with the increase in angle θ. The so-called “tulip” flame even disappeared, if the angle θ is bigger than one certain value. Moreover, the flame propagation speed and pressure are enhanced as the angle θ increases. In addition, the numerical simulation indicates that the burning gas creates an eddy near the tip of the flame, altering the flow field and causing the tulip flame to appear. However, with the angle θ increased, the flame propagation is restrained by the change in sidewalls, resulting in the different flow patterns to suppress the formation of tulip flames and promote flame combustion.

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“…As ondas de pressão ainda desempenham um papel dominante na formação de chama. A interação entre a frente de chama e as ondas de pressão impactam na distorção da chama (YU et al, 2018).…”

Section: Combustão E Meio Ambienteunclassified

Influência Da Relação De Pressão E Fração De Ar Extraída Do Compressor No Arrefecimento Das Pás De Turbinas a Gás

Venâncio¹,

Marconi²,

Monhol³

2019

SODEBRAS

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projeto de extensão com decorrências no contexto contemporâneo de consumo. Para isso, foi realizada uma análise por meio das confluências entre a literatura e o arsenal documental do projeto para sua caracterização extensionistas. Observou-se, a partir da pesquisa, que o Clube de Trocas tem possibilitado a ressignificação do consumo e a mitigação de suas consequências, pautando assim a construção de uma nova epistemologia benéfica e solidária. Além disso, o mesmo tem se apresentado como um espaço potencial para a formação coletiva que propicia a experimentação e a vivência de outra dinâmica de consumo, direta, critica e socializadora.

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Experimental study of premixed syngas/air flame deflagration in a closed duct

Cited by 75 publications

References 52 publications

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

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

Effect of the Inclination Angle on Premixed Flame Dynamics in Half-Open Ducts

Influência Da Relação De Pressão E Fração De Ar Extraída Do Compressor No Arrefecimento Das Pás De Turbinas a Gás

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