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- γ , 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- γ in combination with the synthetic turbulence generator method. The 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 of predicting the transitional flow through a linear compressor cascade, but we also critically discuss the general concept and results.


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    Title :

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


    Contributors:

    Published in:

    Publication date :

    2024-07-01




    Type of media :

    Conference paper , Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





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