Detonation attenuation by foams and wire meshes lining the walls

Teodorczyk, A.; Lee, J. H. S.

doi:10.1007/bf01414988

Cited by 95 publications

(21 citation statements)

References 8 publications

(4 reference statements)

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“…On the other hand, the presence of obstacles can be through the heat and momentum loss to suppress explosion propagation, already hindered the flow of not flammable, and can extract energy from the expansion of the combustion products. Teodorczyk and Lee 12 performed systematic photographic investigations of detonation interactions with foams and wire meshes along acoustic absorbing walls, giving evidence that the use of appropriate, acoustically absorbing materials to line the channel walls can effectively attenuate a fully established detonation wave. At the same time, the porous ferric foam-nickel metal has a certain absorption capacity, which can strongly resist the shock wave, and the attenuation effect of the gas explosion shock wave is obvious, with attenuation rates between 12.9 and 73.8%.…”

Section: Introductionmentioning

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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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: Introductionmentioning

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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“…detonations, ignition behind the strong transverse shocks, by transverse wave interactions and turbulent mixing, can provide alternate means to effect autoignition and thus maintain the detonation propagation. The role of transverse waves thus becomes essential to sustain the detonation propagation for highly unstable detonations [36,37]. For 15%Ar dilution, transverse waves play important role in self-sustaining propagation in the confined domain; the detonation always fails when transverse waves are eliminated [37].…”

Section: Detonation Limitsmentioning

confidence: 99%

Bifurcation of pulsation instability in one-dimensional H2−O2 detonation with detailed reaction mechanism

Han

Qian

et al. 2019

Phys. Rev. Fluids

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“…This can be done by using acoustically absorbent material, which has the ability to attenuate the transverse waves associated with cellular detonation fronts. Such a method using acoustic absorption was indeed employed by Dupré et al [10], Teodorczyk & Lee [11] and more recently by Radulescu & Lee [12] to demonstrate the essential role of transverse waves on the propagation of detonation waves in circular tubes or thin channels. In this work, we extend results from these earlier studies onto the critical tube diameter problem and consider the effect of absorbing walls placed at the exit of the confined tube before the detonation emerges into the open area.…”

Section: Introductionmentioning

confidence: 99%

Effects of porous walled tubes on detonation transmission into unconfined space

Mehrjoo

Gao

Kiyanda

et al. 2015

Proceedings of the Combustion Institute

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Experiments were carried out to investigate the failure mechanisms in the critical tube diameter phenomenon for stable and unstable mixtures. It was previously postulated that in unstable mixtures where the detonation structure is highly irregular, the failure during the diffraction is caused by the suppression of the instability responsible for the generation of local explosion centers. In stable mixtures, typically with high argon dilution and where the detonation is characterized by very regular cell, the failure is driven by the excessive global front curvature above which a detonation cannot propagate. To discern these two failure mechanisms, porous wall tubes are used to attenuate the transverse instability before the detonation emerges into the unconfined space. Porous sections with length L/D from 0 to 3.0 are used with two confined tube diameters D = 12.7 and 15.5 mm. The present results show that when porous wall tubes are used, the critical pressure for unstable C2H2 + 2.5O2 and C2H2 + 5 N2O mixtures increases significantly. In contrast, for stable argon diluted C2H2 + 2.5 O2 + 70% mixtures, the results with porous wall tubes exhibit little variation up to L/D = 2.5. For L/D > 2.5 a noticeable increase in critical pressure for argon diluted mixtures is also observed. This is dominantly caused by the slow mass divergence through the porous material inducing a curvature on the detonation front even before it emerges into the open area. The present experiment again demonstrates the importance of the transverse wave instability for typical hydrocarbon mixtures in critical situations such as the critical tube diameter experiment. For special cases such as highly argon diluted mixtures, the instability does not play a significant role in the failure and the propagation is controlled dominantly by the global curvature effect and the shock-ignition mechanism.

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Detonation attenuation by foams and wire meshes lining the walls

Cited by 95 publications

References 8 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

Bifurcation of pulsation instability in one-dimensional H2−O2 detonation with detailed reaction mechanism

Effects of porous walled tubes on detonation transmission into unconfined space

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