Detonations in hydrogen-methane-air mixtures in semi confined flat channels

Rudy, W.; Żbikowski, Mateusz; Teodorczyk, A.

doi:10.1016/j.energy.2016.06.001

Cited by 37 publications

(11 citation statements)

References 11 publications

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“…Quenching occurs if the detonation is not able to overcome the expansion losses coming from the presence of the interface. Experiments conducted by Rudy et al [15,20,21] and Grune et al [22] to determine the propagation limits of detonations in H 2 -O 2 and H 2 -Air using the same experimental configuration as Dabora et al [18] confirmed their findings, namely a h crit ∼ 3λ for stoichiometric H 2 -Air, and…”

Section: Introductionmentioning

confidence: 61%

Influence of the chemical modeling on the quenching limits of gaseous detonation waves confined by an inert layer

Taileb

Melguizo-Gavilanes

Chinnayya

2020

Combustion and Flame

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The effect of chemistry modeling on the flow structure and quenching limits of detonations propagating into reactive layers bounded by an inert gas is investigated numerically. Three different kinetic schemes of increasing complexity are used to model a stoichiometric H 2-O 2 mixture: single-step, three-step chainbranching and detailed chemistry. Results show that while the macroscopic characteristics of this type of detonations e.g. velocities, cell-size irregularity and leading shock dynamics, are similar among the models tested, their instantaneous structures are significantly different before and upon interaction with the inert layer when compared using a fixed height. When compared at their respective critical heights, h crit , i.e. the reactive layer height at which successful detonation propagation is no longer possible, similarities in their structures become apparent. The numerically predicted critical heights increase as h crit, Detailed � h crit, 3-Step < h crit, 1-Step. Notably, h crit, Detailed was found to be in agreement with experimentally reported values. The physical mechanisms present in detailed chemistry and ne

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Section: Introductionmentioning

confidence: 61%

Influence of the chemical modeling on the quenching limits of gaseous detonation waves confined by an inert layer

Taileb

Melguizo-Gavilanes

Chinnayya

2020

Combustion and Flame

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“…Table 2 summarized the MESGs of typical stoichiometric fuel gas-air mixtures [11,30] at normal temperature and pressure (NTP) conditions. Other combustion parameters, i.e., laminar burning velocity (S L ), isobaric sound speed of combustion products (c b ), Chapman-Jouguet (CJ) detonation velocity (V CJ ), detonation cell size (k) [31][32][33][34], auto-ignition temperature (AIT) [35,36], and adiabatic flame temperature (T a ), are also available in Table 2. The laminar burning velocities of hydrocarbons are calculated using the PREMIX code [37] and the GRI mechanism [38].…”

Section: Test Mixturementioning

confidence: 99%

Flame quenching by crimped ribbon flame arrestor: A brief review

Wang

Shen

et al. 2018

Process Safety Progress

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Accidental explosions in gas/oil pipelines remain one major concern in process industries. The crimped ribbon flame arrestor is an effective device to prevent flame propagation. This review summarizes existing knowledge on the quenching of flame of different regimes in narrow channels and crimped ribbon flame arrestors. The influences of various parameters (e.g., arrestor element thickness, expansion ratio, system pressure) on the performance of crimped ribbon flame arrestors are discussed. The presented discussions give a better understanding on the considerations which must be taken into account to quench an explosion successfully. Other scenarios, such as quenching of two-phase vapor-liquid explosions and overdriven detonations should be got further attention. Figure 18. The results of quenching ethylene/air/oxygen flames by a DN50 flame arrestor [114]. Black dot: flame quenched; red cross: flame not quenched. [Color figure can be viewed at wileyonlinelibrary.com]

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“…An other study show that the critical layer thickness varies with the mixtures (Grune et al, 2016). The Warsaw University of Technology group showed that addition of methane to a hydrogen-air mixture increased the critical layer thickness, as shown by Rudy et al (Rudy et al, 2016). A study by Houim and Fievisohn (Houim and Fievisohn, 2017) investigated the influence of the ratio of acoustic impedance between the reactant and inert layer on the detonation propagation.…”

Section: Introductionmentioning

confidence: 96%

Detonation propagation in stratified reactant layers

Gaathaug

Bjerketvedt

Lundberg

et al. 2017

Linköping Electronic Conference Proceedings

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A numerical investigation of detonation propagation in stratified reactant layers is presented in this paper. It is baesed on the reactive Euler equations using a two step chemical kinetics approach. The numerical simulations are based on the reactive Euler equations. Turbulence is solved with a one equation model, and the chemical kinetics is modeled as a two steps. The first step is an induction time step, and the second step is an exothermic step. The numerical setup is scaled to keep the numerical resolution of the induction zone constant to 10 cells. Initial simulations were conducted to generate detonation structures in homogeneous reactants and with cyclic boundary conditions. The developed structures were mapped into a domain with a stratified reactant layer on top of a inert layer. The results show that the detonations fail to propagate as the triple points of the propagating detonation is "lost" into the inert layer.

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Detonations in hydrogen-methane-air mixtures in semi confined flat channels

Cited by 37 publications

References 11 publications

Influence of the chemical modeling on the quenching limits of gaseous detonation waves confined by an inert layer

Influence of the chemical modeling on the quenching limits of gaseous detonation waves confined by an inert layer

Flame quenching by crimped ribbon flame arrestor: A brief review

Detonation propagation in stratified reactant layers

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