Large eddy simulation of flame structure and combustion mode in a hydrogen fueled supersonic combustor

Huang, Zhi Wei; He, Guoqiang; Qin, Fei; Wei, Xianggeng

doi:10.1016/j.ijhydene.2015.06.011

Cited by 98 publications

(24 citation statements)

References 27 publications

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“…Verification of these numerics is provided elsewhere [41][42][43][44]. Finally, note that OpenFOAM solvers or earlier versions have been observed to reproduce satisfactory results in a large variety of combustion problems [19,39,[45][46][47][48][49][50][51].…”

Section: Methodsmentioning

confidence: 99%

Numerical Simulations of Combustion Instabilities in a Combustor with an Augmentor-Like Geometry

Gonzalez-Juez

2019

Aerospace

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With the goal of assessing the capability of Computational Fluid Dynamics (CFD) to simulate combustion instabilities, the present work considers a premixed, bluff-body-stabilized combustor with well-defined inlet and outlet boundary conditions. The present simulations produce flow behaviors in good qualitative agreement with experimental observations. Notably, the flame flapping and standing acoustic waves seen in the experiments are reproduced by the simulations. Moreover, present predictions for the dominant instability frequency have an error of 7% and those of the rmspressure fluctuations show an error of 16%. In addition, an analysis of simulation results for the limit cycle complements previous experimental analyses by supporting the presence of an active frequency-locking mechanism.

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Section: Methodsmentioning

confidence: 99%

Numerical Simulations of Combustion Instabilities in a Combustor with an Augmentor-Like Geometry

Gonzalez-Juez

2019

Aerospace

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“…are the temperature and mass fraction vector, respectively. For most combustion regions, the composition vector of fine-scale structure shows little contrast with its average value (Baudoin et al, 2009;Berglund et al, 2010;Huang et al, 2015); then the source term is commonly substituted by the latter, i.e.ω i (T * , Y * ) ≈ ω i (T,Ỹ). Under these conditions, the mean chemical reaction rate can be expressed aṡ…”

Section: Pasr Modelmentioning

confidence: 99%

Turbulence–chemistry interaction models with finite-rate chemistry and compressibility correction for simulation of supersonic turbulent combustion

Xiang

Yang

Xie

et al. 2020

Engineering Applications of Computational Fluid Mechanics

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The turbulence-chemistry interaction model with finite-rate chemistry is a common model for solving supersonic turbulent combustion and takes into consideration the interaction between turbulent mixing and chemical reactions as well as finite chemistry reaction instead of the fast chemistry assumption. However, not only the density and viscosity but also the chemical reactions are affected by the compressibility of the flow field with an increasing Mach number. Considering engineering applications, the compressibility correction was introduced to two recent turbulence-chemistry interaction models with finite-rate chemistry, the Partially Stirred Reactor (PaSR) model and Unsteady PaSR (UPaSR) model, in a Reynolds-averaged Navier-Stokes framework. Numerical simulations of two typical supersonic combustors showed that the interaction between the turbulence and combustion was intensive within complex supersonic chemical reaction flow and could be described by the fine-scale structure volume fraction. The distributions of temperature, pressure, velocity and components somewhat downstream of fuel injection areas were most obviously improved by the presented models. Moreover, the increase in computational time consumption by the compressibility correction was less than 2%. It was found that the Compressible PaSR (C-PaSR) model and the UPaSR model show better consistency with experimental results than the traditional PaSR model.

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“…The damping function method was also discussed by Fureby et al (2004) in detail. Because the previous studies have shown that the wall effect can be neglected, slip wall was employed in the DLR simulations of Oevermann (2000), Genin and Menon (2010b), Huang et al (2015), and Gong et al (2017). In consideration of this, the present treatment of wall turbulence is physically justifiable and believed to cause negligible influence on the results.…”

Section: Computational Specificationsmentioning

confidence: 99%

“…Fureby et al (2014) found that the finite-rate PaSR model produces better predictions in both the timeaveraged axial velocity and the temperature profiles than the flamelet model. Huang et al (2015) also adopted the PaSR model and proposed that the auto-ignition plays an important role in flame stabilization and lift-off.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on Flame Stabilization in DLR Hydrogen Supersonic Combustor with Strut Injection

Zhang

Yao

et al. 2017

Combustion Science and Technology

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Flame stabilization in the DLR hydrogen supersonic combustor with strut injection was numerically investigated by using an in-house large eddy simulation code developed on the OpenFoam platform. To facilitate the comparison and analysis of various hydrogen oxidation mechanisms with different levels of mechanism reduction, the proposed 2D calculation model was validated against both the 3D simulation and the experimental data. The results show that the 2D model can capture the DLR flow and combustion characteristics with satisfactorily quantitative accuracy and significantly less computational load. By virtue of the flow visualization and the analyses of species evolution and heat release, the supersonic combustion in the DLR combustor can be divided into three stages along the streamwise direction: the induction stage where ignition occurs and active radicals are produced, the transition stage through which radicals are advected to the downstream, and the intense combustion stage where most heat release occurs. Furthermore, the sensitivity analysis of key reaction steps identifies the important role of chain carrying and heat release reactions in numerically reproducing the three-stage combustion stabilization mode in the DLR combustor.ARTICLE HISTORY

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Large eddy simulation of flame structure and combustion mode in a hydrogen fueled supersonic combustor

Cited by 98 publications

References 27 publications

Numerical Simulations of Combustion Instabilities in a Combustor with an Augmentor-Like Geometry

Numerical Simulations of Combustion Instabilities in a Combustor with an Augmentor-Like Geometry

Turbulence–chemistry interaction models with finite-rate chemistry and compressibility correction for simulation of supersonic turbulent combustion

Numerical Investigation on Flame Stabilization in DLR Hydrogen Supersonic Combustor with Strut Injection

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