Scale-Resolving Simulations with a Low-Dissipation Low-Dispersion Second-Order Scheme for Unstructured Finite-Volume Flow Solvers

Probst, Axel; Löwe, Johannes; Reuß, Silvia; Knopp, Tobias; Kessler, Roland

doi:10.2514/6.2015-0816

Cited by 13 publications

(4 citation statements)

References 24 publications

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“…Recently, a low-dissipation/low-dispersion unstructured discretization scheme especially designed for SRS has been developed and was implemented into the code [110][111].…”

Section: Transition Prediction In the Dlr Tau Codementioning

confidence: 99%

Development and Application of Transition Prediction Techniques in an Unstructured CFD Code (Invited)

Krumbein

Krimmelbein

Grabe

et al. 2015

45th AIAA Fluid Dynamics Conference

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“…Recently, a low-dissipation/low-dispersion unstructured discretization scheme especially designed for SRS has been developed and was implemented into the code [110][111].…”

Section: Transition Prediction In the Dlr Tau Codementioning

confidence: 99%

Development and Application of Transition Prediction Techniques in an Unstructured CFD Code (Invited)

Krumbein

Krimmelbein

Grabe

et al. 2015

45th AIAA Fluid Dynamics Conference

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“…A Poisson equation is solved for the pressure correction through the Flexible Generalized Minimal Residual Method (FGMRES) with a single multigrid V-cylce for convergence acceleration. Convective terms are discretized through a second-order accurate scheme with low-dissipation and low-dispersion properties, which has been described by Löwe et al 15 and tested for complex 3D flows by Probst et al 16 For the temporal discretization a second-order Three-Point Backward (TPB) scheme is employed. The enthalpy and temperature of the gaseous mixture are related by…”

Section: A Modeling Of the Gaseous Phasementioning

confidence: 99%

Large-Eddy Simulation of Spray Flames in the DLR Generic Single Sector Combustor

Ess

Gerlinger

2019

AIAA Propulsion and Energy 2019 Forum

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The lean burn combustion concept has shown potential for a further reduction of pollutants from aero engines. Partially premixed swirled flames in lean burn combustors strongly influence stability, performance and pollutant emissions associated with this concept and remain a major challenge when it comes to their prediction by numerical simulations. Large-Eddy Simulations (LES) for non-reactive and chemically reactive two-phase flows are performed for the DLR Generic Single Sector Combustor, which is a generic spray burner typical for lean burn combustors. Most simulations published on this kerosene burner do not accurately capture the lift-off height of the flame and the temperature distributions within the flow field. In contrast to previous scale-resolving simulations, the focus of this work is on LES, employing Finite-Rate Chemistry (FRC) for detailed combustion modeling. A reaction mechanism with 59 species and 372 elementary reactions and an Assumed Probability Density Function (APDF) approach for turbulence-chemistry interaction is used. The non-reacting mean velocity field, the spray distribution, flame shape, and flame lift-off height obtained from the simulations agree well with experimental data. In the flame, both premixed and diffusion-dominated regions are identified. Premixed zones occur predominantely, mainly as coherent structures in areas with high temperature gradients, whereas diffusion-dominated flame zones occur as isolated regions. For the detailed analysis of the burner, the employed numerical framework, including FRC, was found to be essential for an accurate prediction of the complex flame structure.

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“…To provide sufficient numerical accuracy for scale-resolving simulations (such as IDDES), the low-dissipation low-dispersion (LD2) scheme was applied [3]. This scheme combines a skew-symmetric central discretization of the spatial fluxes, a shock-adapted mix of 2nd-and 4thorder artificial matrix dissipation, and a low-dispersive reconstruction of the face states.…”

Section: Introductionmentioning

confidence: 99%

Hybrid RANS/LES of an Isolated Engine Nacelle with Crosswind Using an Unstructured CFD Solver

Burnazzi

Probst

Steger

2019

Progress in Hybrid RANS-LES Modelling

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Scale-Resolving Simulations with a Low-Dissipation Low-Dispersion Second-Order Scheme for Unstructured Finite-Volume Flow Solvers

Cited by 13 publications

References 24 publications

Development and Application of Transition Prediction Techniques in an Unstructured CFD Code (Invited)

Development and Application of Transition Prediction Techniques in an Unstructured CFD Code (Invited)

Large-Eddy Simulation of Spray Flames in the DLR Generic Single Sector Combustor

Hybrid RANS/LES of an Isolated Engine Nacelle with Crosswind Using an Unstructured CFD Solver

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