Analysis of a Synthetic Turbulence Generation Method for Periodic Configurations

Morsbach, Christian; Franke, Martin

doi:10.1007/978-3-030-04915-7_23

Cited by 10 publications

(8 citation statements)

References 7 publications

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“…III.B.3) proposed by Shur et al [29]. This method has been implemented and validated in TRACE * by Morsbach and Franke [30]. Further analysis was done by Matha et al [31].…”

Section: E Synthetic Inflow Turbulencementioning

confidence: 99%

Transitional Delayed Detached-Eddy Simulation for a Compressor Cascade: A Critical Assessment

Möller,

Tucker,

Wang

et al. 2024

Journal of Propulsion and Power

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The accurate prediction of transitional flows is crucial for the industrial turbomachinery design process. While a Reynolds-averaged Navier–Stokes approach inherently brings conceptual weaknesses, large-eddy simulation will still be too expensive in the near future to affordably analyze complex turbomachinery configurations. We introduce a transitional delayed detached-eddy simulation (DDES) model, namely, DDES-[Formula: see text], and analyze the numerical results of the compressor cascade V103. A comparison with the fully turbulent DDES approach emphasizes the benefit of coupling DDES with a transition model. Issues with undesired decay of modeled turbulent kinetic energy in the freestream are improved when running DDES-[Formula: see text] in combination with the synthetic turbulence generator method. The best results for DDES-[Formula: see text] are obtained when changing the inviscid flux solver blending from dynamic to constant mode. We show that DDES-[Formula: see text] is capable of predicting the transitional flow through a linear compressor cascade, but we also critically discuss the general concept and results.

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“…III.B.3) proposed by Shur et al [29]. This method has been implemented and validated in TRACE * by Morsbach and Franke [30]. Further analysis was done by Matha et al [31].…”

Section: E Synthetic Inflow Turbulencementioning

confidence: 99%

Transitional Delayed Detached-Eddy Simulation for a Compressor Cascade: A Critical Assessment

Möller,

Tucker,

Wang

et al. 2024

Journal of Propulsion and Power

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“…In the precursor simulation, periodic Synthetic Turbulence Generation (STG) takes place at the inlet, with the methodology discussed in [75]. This approach is a modification of the periodic STG proposed by Morschbach et al [76], which is based on the work of Shur et al [77]. These methods derive from the original formulation developed by Kraichnan [78], based on the superposition of several harmonics derived from a reference turbulent kinetic energy spectrum to generate synthetic turbulence.…”

Section: Strategymentioning

confidence: 99%

Subgrid Turbulent Flux Models for Large Eddy Simulations of Diffusion Flames in Space Propulsion

Martinez-Sanchis,

Sternin,

Banik

et al. 2024

Preprint

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Subgrid scale models for unresolved turbulent fluxes are investigated with a focus on combustion for space propulsion applications. An extension to the gradient model is proposed, introducing a dependency on the local burning regime. The dynamic behavior of the model's coefficients is investigated, and scaling laws are studied. The discussed models are validated using a DNS database of a high-pressure turbulent fuel-rich methane-oxygen diffusion flame. The operating point and turbulence characteristics are selected to resemble those of modern combustors for space propulsion applications to support the future usage of the devised model in this context.

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“…In the precursor simulation, periodic Synthetic Turbulence Generation (STG) takes place at the inlet, with the methodology discussed in [74]. This approach is a modification of the periodic STG proposed by Morschbach et al [75], which is based on the work of Shur et al [76]. These methods derive from the original formulation developed by Kraichnan [77], based on the superpositions of several harmonics derived from a reference turbulent kinetic energy spectrum to generate synthetic turbulence.…”

Section: Strategymentioning

confidence: 99%

Subgrid Turbulent Flux Models for Large Eddy Simulations of Diffusion Flames in Space Propulsion

Martinez-Sanchis,

Sternin,

Banik

et al. 2024

Fluids

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Subgrid scale models for unresolved turbulent fluxes are investigated, with a focus on combustion for space propulsion applications. An extension to the gradient model is proposed, introducing a dependency on the local burning regimen. The dynamic behaviors of the model’s coefficients are investigated, and scaling laws are studied. The discussed models are validated using a DNS database of a high-pressure, turbulent, fuel-rich methane–oxygen diffusion flame. The operating point and turbulence characteristics are selected to resemble those of modern combustors for space propulsion applications to support the future usage of the devised model in this context.

show abstract

Analysis of a Synthetic Turbulence Generation Method for Periodic Configurations

Cited by 10 publications

References 7 publications

Transitional Delayed Detached-Eddy Simulation for a Compressor Cascade: A Critical Assessment

Transitional Delayed Detached-Eddy Simulation for a Compressor Cascade: A Critical Assessment

Subgrid Turbulent Flux Models for Large Eddy Simulations of Diffusion Flames in Space Propulsion

Subgrid Turbulent Flux Models for Large Eddy Simulations of Diffusion Flames in Space Propulsion

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