LES model of large scale hydrogen–air planar detonations: Verification by the ZND theory

Żbikowski, Mateusz; Makarov, Dmitriy; Molkov, Vladimir

doi:10.1016/j.ijhydene.2008.05.071

Cited by 34 publications

(15 citation statements)

References 27 publications

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“…The described above LES detonation model was verified against analytical solution of the ZND theory for the planar detonation wave [19] and provided the excellent agreement for von Neumann peak pressure, detonation propagation velocity, etc. The model was found to be grid independent for planar detonation in a wide range of CV sizes from 10 cm to 1 m. This makes the LES model a promising tool for the hydrogen safety engineering.…”

Section: The Les Detonation Modelmentioning

confidence: 76%

“…In the previous study [19] the LES detonation model was verified against the ZND theory for stoichiometric hydrogen-air composition, where parameters of the theoretical ZND detonation wave were calculated using SD Toolbox [31], and the numerical simulations were compared against solution of the Riemann problem [32]. The LES detonation model demonstrated the capability to capture strong shocks and reproduce major detonation parameters [19].…”

Section: Resultsmentioning

confidence: 99%

“…The SGS viscosity is modelled using the renormalization group (RNG) theory [23]. Both the deflagration model [22] and the detonation model [19] use the progress variable equation for simulation of reaction front propagation:…”

Section: The Les Detonation Modelmentioning

confidence: 99%

“…Direct simulation of DDT process on grids with large CV size is not possible and sub-grid scale (SGS) modelling based on resolved parameters is required. The alternative to Arrhenius chemistry and Euler equations method of large-scale detonation simulation was developed recently by the authors and verified against ZND theory [19]. The method is based on application of the gradient method for the closure of the progress variable equation to simulate propagation of the reaction zone.…”

Section: Introductionmentioning

confidence: 99%

“…Use of LES makes the model potentially suitable for a sub-grid scale (SGS) modelling of DDT indication during large-scale explosions. This paper presents a comparison between the 3D detonation simulations performed by the LES model [19] and the large-scale detonation experiment carried out by Kurchatov Institute (Russia) and described in [10] and later in more detail in [21].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Numerical simulations of large-scale detonation tests in the RUT facility by the LES model

Żbikowski

Makarov

Molkov

2010

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Section: The Les Detonation Modelmentioning

confidence: 76%

Section: Resultsmentioning

confidence: 99%

Section: The Les Detonation Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical simulations of large-scale detonation tests in the RUT facility by the LES model

Żbikowski

Makarov

Molkov

2010

Journal of Hazardous Materials

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Large eddy simulation investigation of flame acceleration and deflagration to detonation transition of methane‐air mixture in rectangular channel

Zhao

Zhang²

2022

Engineering Reports

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Large eddy simulation is used to simulate flame acceleration and deflagration to detonation transition of methane-air mixtures in a small-scale 3D channel. The simulation results show the changing of the flame surface 3D structure in the stage of flame acceleration and deflagration to detonation transition. In the first stage, the flame velocity increases exponentially because of the expansion of combustion products and the wrinkle of flame surface. In the next stage, the interaction between flame and pressure wave makes flame accelerate continuously, and the acceleration rate of the flame velocity decreases first and then increases. As the pressure of the leading shock increases, the boundary layer is heated by the preheating area in front of the flame surface at the channel wall. Because the cross section of the channel is square, the ultrafast flame first appears in the boundary layer of the four inner edges between the channel wall, then it appears in the boundary layer on the channel wall. The ultrafast flame generates oblique shock waves continuously moving to the center of the channel and colliding with each other, which promote the occurrence of local explosion and the coupling of flame surface and leading shock wave.

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Hydrogen Safety Engineering

Molkov¹

2012

Comprehensive Renewable Energy

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LES model of large scale hydrogen–air planar detonations: Verification by the ZND theory

Cited by 34 publications

References 27 publications

Numerical simulations of large-scale detonation tests in the RUT facility by the LES model

Numerical simulations of large-scale detonation tests in the RUT facility by the LES model

Large eddy simulation investigation of flame acceleration and deflagration to detonation transition of methane‐air mixture in rectangular channel

Hydrogen Safety Engineering

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