Comparison of DES and LES on the Transitional Flow of Turbine Blades

Magagnato, Franco; Pritz, Balázs; Gabi, Martin

doi:10.1007/978-3-540-77815-8_22

Cited by 2 publications

(4 citation statements)

References 9 publications

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Section: Introductionmentioning

confidence: 99%

“…To the author's knowledge, Magagnato et al [4] were the first who presented an assessment of the original detached-eddy simulation (DES) model (Spalart et al [5]) without an additional transition model for transitional flows in a VKI turbine cascade. Numerical results were 'less satisfactory' [4], which can be seen as expectable when running a model designed for fully turbulent flows in transitional configuration. Wang et al [6] first mentioned the potential of coupling a RANS transition model with the DES framework after they introduced a modular RANS transition model based on an additional transport equation for the intermittency factor 𝛾.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

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

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

“…To the author's knowledge, Magagnato et al [4] were the first who assessed the predictive quality of the original detached-eddy simulation (DES) model (Spalart et al [5]) for transitional flows in a VKI turbine cascade without utilizing an additional transition model. Numerical results were 'less satisfactory' [4], which can be seen as expectable when running a model designed for fully turbulent flows in transitional circumstances. Wang et al [6] first mentioned the potential of coupling a RANS transition model with the DES framework after they introduced a modular RANS transition model based on an additional transport equation for the intermittency factor 𝛾.…”

Section: Introductionmentioning

confidence: 99%

Critical Assessment of a Transitional Delayed Detached-Eddy Simulation Model for the Prediction of the Linear Compressor Cascade V103

Möller

Tucker

Wang

et al. 2023

AIAA AVIATION 2023 Forum

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The accurate prediction of transitional flows is crucial for the industrial turbomachinery design process. While RANS inherently brings conceptual weaknesses, LES will be still too expensive in the near future to affordably simulate complex turbomachinery configurations. We introduce a transitional DDES model, namely DDES-𝛾, and analyze 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 modelled turbulent kinetic energy in the free-stream are improved when running DDES-𝛾 in combination with the synthetic turbulence generator method. Best results for DDES-𝛾 are obtained when changing the inviscid flux solver blending from dynamic to constant mode. We show that DDES-𝛾 is capable to predict the transitional flow through a linear compressor cascade, but also critically discuss the general concept and results.

show abstract

Comparison of DES and LES on the Transitional Flow of Turbine Blades

Cited by 2 publications

References 9 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

Critical Assessment of a Transitional Delayed Detached-Eddy Simulation Model for the Prediction of the Linear Compressor Cascade V103

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