Effects of stratification on premixed cool flame propagation and modeling

Wang, Yiqing; Han, Wang; Chen, Zheng

doi:10.1016/j.combustflame.2021.02.040

Cited by 12 publications

(5 citation statements)

References 64 publications

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“…The CHEMKIN package was employed to evaluate the reaction rates and thermodynamic properties. Both A-SURF and AMROC have been successfully used in previous studies on detonation propagation (e.g., [24][25][26][27][28][29][30]). The details on the governing equations, numerical methods and code validation of A-SURF and AMROC can be found in [19][20][21] and thereby are not repeated here.…”

Section: Model and Numerical Methodsmentioning

confidence: 99%

Effects of Dilution and Pressure on Detonation Propagation Across an Inert Layer

Wang

Deiterding

et al. 2023

AIAA Journal

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In explosion accidents, inert layer(s) can be used to dampen or suppress detonation propagation. In detonation engines, the detonation may propagate in an inhomogeneous mixture with inert layer(s). Here, the detonation propagation in hydrogen/oxygen/nitrogen mixtures with a single inert layer normal to the detonation propagation direction was investigated. Six hydrogen/oxygen/nitrogen mixtures with different amounts of nitrogen dilution and at different initial pressures were considered. The emphasis was placed on assessing the effects of nitrogen dilution and pressure on detonation across an inert layer. It was found that successful detonation reinitiation occurs only when the inert layer thickness is below some critical value. The detonation reinitiation process was analyzed. The interactions of transverse waves, the reactive–inert layer interface, and instabilities jointly induced local autoignition/explosions and detonation reinitiation. Counterintuitively, it was found that a thicker inert layer is required to quench a weaker detonation (with more nitrogen dilution or with lower-energy density at lower pressure). With the increase of nitrogen dilution or the decrease of initial pressure, the induction length and cell size of the detonation became larger, which unexpectedly resulted in the larger critical inert layer thickness.

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Section: Model and Numerical Methodsmentioning

confidence: 99%

Effects of Dilution and Pressure on Detonation Propagation Across an Inert Layer

Wang

Deiterding

et al. 2023

AIAA Journal

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“…As a common phenomenon, combustion, including detonation, extensively exists in nature, our daily life, and various industrial fields [1][2][3][4][5][6] . The research of combustion problems is of great significance for actual production problems.…”

Section: Introductionmentioning

confidence: 99%

“…For detonation, as a special case of combustion phenomenon, previous research mainly relied on experiments and a bit of theoretical analysis 3,[7][8][9] . With the development of computer technology, the numerical simulation of detonation has made great achievements 1,2,5,6,[10][11][12][13][14][15][16] . Generally, the simulation of detonation system has three scales: microscopic scale, mesoscopic scale and macroscopic scale.…”

Section: Introductionmentioning

confidence: 99%

“…As a common phenomenon, combustion, including detonation, extensively exists in nature, our daily life, and various industrial fields. [1][2][3][4][5][6] The research of combustion problems is of great significance for actual production problems. In the combustion process, fluid dynamics and chemical reactions are coupled and interact with each other, and this process spans multiple orders of magnitude of time and space.…”

Section: Introductionmentioning

confidence: 99%

“…3,[7][8][9] With the development of computer technology, the numerical simulation of detonation has made great achievements. 1,2,5,6,[10][11][12][13][14][15][16] Generally, the simulation of detonation system has three scales: microscopic scale, mesoscopic scale and macroscopic scale. For the microscopic scale, molecular dynamics (MD) is a common method.…”

Section: Introductionmentioning

confidence: 99%

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Discrete Boltzmann modeling of detonation: Based on the Shakhov model

Shan

Zhang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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A Discrete Boltzmann Model(DBM) based on the Shakhov model for detonation is proposed. Compared with the DBM based on the Bhatnagar–Gross–Krook (BGK) model, the current model has a flexible Prandtl numbers and consequently can be applied to a much wider range of detonation phenomena. Besides the Hydrodynamic Non-Equilibrium (HNE) behaviors usually investigated by the Navier–Stokes model, the most relevant Thermodynamic Non-Equilibrium (TNE) effects can be probed by the current model. The model is validated by some well-known benchmarks, and some steady and unsteady detonation processes are investigated. As for the von Neumann peak relative to the wave front, it is found that (i) (within the range of numerical experiments) the peak heights of pressure, density, and flow velocity increase exponentially with the Prandtl number, the maximum stress increases parabolically with the Prandtl number, and the maximum heat flux decreases exponentially with the Prandtl number and (ii) the peak heights of pressure, density, temperature and flow velocity, and the maximum stress within the peak are parabolically increase with the Mach number, the maximum heat flux decreases exponentially with the Mach number.

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Numerical study on propagation and NO reduction behavior of laminar stratified ammonia/air flames

Tomidokoro

Yokomori

2022

Combustion and Flame

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Effects of stratification on premixed cool flame propagation and modeling

Cited by 12 publications

References 64 publications

Effects of Dilution and Pressure on Detonation Propagation Across an Inert Layer

Effects of Dilution and Pressure on Detonation Propagation Across an Inert Layer

Discrete Boltzmann modeling of detonation: Based on the Shakhov model

Numerical study on propagation and NO reduction behavior of laminar stratified ammonia/air flames

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