Effect of concentration inhomogeneity on the pulsating instability of hydrogen–oxygen detonations

Ma, W. J.; Wang, C.; Han, Wenhu

doi:10.1007/s00193-020-00976-7

Cited by 9 publications

(19 citation statements)

References 25 publications

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“…Similar findings have also been reported in Kim et al. (2020) and Ma, Wang & Han (2020). These complex dynamical phenomena and identification of optimal perturbation scales (e.g.…”

Section: Introductionsupporting

confidence: 91%

“…A key outcome of these analyses is the demonstration of the existence of bands of wavelength of the periodic variations that correspond to the regularization of the detonation dynamics. Similar findings have also been reported in Kim et al (2020) and Ma, Wang & Han (2020). These complex dynamical phenomena and identification of optimal perturbation scales (e.g.…”

supporting

confidence: 87%

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Synchronization of detonations: Arnold tongues and devil's staircases

Goldin

Kasimov²

2022

J. Fluid Mech.

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“…Similar findings have also been reported in Kim et al. (2020) and Ma, Wang & Han (2020). These complex dynamical phenomena and identification of optimal perturbation scales (e.g.…”

Section: Introductionsupporting

confidence: 91%

supporting

confidence: 87%

Synchronization of detonations: Arnold tongues and devil's staircases

Goldin

Kasimov²

2022

J. Fluid Mech.

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“…1998; Boulal et al. 2016, 2018; Ma, Wang & Han 2020) to the detonation propagation direction, respectively. Figures 1( c ) and 1( d ) depict reactants with inert layers parallel (Houim & Fievisohn 2017; Reynaud, Virot & Chinnayya 2017; Maxwell & Melguizo-Gavilanes 2019; Taileb, Melguizo-Gavilanes & Chinnayya 2019) and normal (Gavrilenko, Krasnov & Nikolaev 1982; Bjerketvedt, Sonju & Moen 1986; Teodorczyk & Benoan 1996; Kuznetsov et al.…”

Section: Introductionmentioning

confidence: 97%

“…Besides, although 1-D simulation results were reported by Ma et al. (2020), the evolution of cellular detonation structure was not studied before.…”

Section: Introductionmentioning

confidence: 99%

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Numerical studies on detonation propagation in inhomogeneous mixtures with periodic reactant concentration gradient

et al. 2023

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In detonation engines and accidental explosions, a detonation may propagate in an inhomogeneous mixture with non-uniform reactant concentration. In this study, one- and two-dimensional simulations are conducted for detonation propagation in hydrogen/oxygen/nitrogen mixtures with periodic sinusoidal or square wave distribution of the reactant concentration. The objective is to assess the properties of detonation propagation in such inhomogeneous mixtures. Specifically, detonation quenching and reinitiation, cellular structure, cell size and detonation speed deficit are investigated. It is found that there exists a critical amplitude of the periodic mixture composition distribution, above which the detonation quenches. When the amplitude is below the critical value, detonation quenching and reinitiation occur alternately. A double cellular structure consisting of substructures and a large-scale structure is found for a two-dimensional detonation propagating in inhomogeneous mixtures with a periodic reactant concentration gradient. The detonation reinitiation process and the formation of the double cellular structure are interpreted. To quantify the properties of detonation propagation in different inhomogeneous mixtures, the large cell size, critical amplitude, transition distance and detonation speed deficit are compared for hydrogen/air without and with nitrogen dilution and for periodic sine wave and square wave distributions of the reactant concentration. The large-scale cell size is found to be linearly proportional to the wavelength, and both the critical amplitude and the transition distance decrease with the wavelength. The small detonation speed deficit is shown to be due to the incomplete combustion of the reactant. This work provides helpful understanding of the features of detonation propagation in inhomogeneous mixtures.

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Pulsating one-dimensional detonation in ammonia-hydrogen–air mixtures

Zhu

Fang

et al. 2022

International Journal of Hydrogen Energy

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Effect of concentration inhomogeneity on the pulsating instability of hydrogen–oxygen detonations

Cited by 9 publications

References 25 publications

Synchronization of detonations: Arnold tongues and devil's staircases

Synchronization of detonations: Arnold tongues and devil's staircases

Numerical studies on detonation propagation in inhomogeneous mixtures with periodic reactant concentration gradient

Pulsating one-dimensional detonation in ammonia-hydrogen–air mixtures

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