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Improved prediction of low-pressure turbine wake mixing by Delayed Detached Eddy Simulation, including an algebraic model for bypass transition

S. Kubacki and Erik Dick (UGent)
(2023) INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW. 103.
Author
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Abstract
We present a hybrid RANS-LES technique of the Delayed Detached Eddy Simulation (DDES) form for transitional flow through low-pressure turbine blade cascades. A first ingredient is representation in RANS-mode of the flow that approaches the blades and the flow near the blade surfaces. The objective is to provide the correct level of modelled turbulent kinetic energy to an algebraic model for bypass transition which is coupled to a turbulence model, and thus simulation of bypass transition in attached boundary layer state by a RANS-model component. A second ingredient is resolution of the Kelvin-Helmholtz instability of a laminar separated boundary layer in RANS-mode, with transition in RANS-mode by a model component or transition in LES-mode by resolved breakdown. The third ingredient is representation in LES-mode of a wake flow and a separated layer that enters a wake, such that the wake mixing is by resolved fluctuations. For realisation of the RANS-zones and the LESzones, we derive an appropriate sensor function. We demonstrate the good functioning of the technique for transitional flows of different types.
Keywords
Fluid Flow and Transfer Processes, Mechanical Engineering, Condensed Matter Physics, Low-pressure turbine cascade, Wake flow, Separation -induced transition, Bypass transition, Algebraic intermittency model, Laminar -to -turbulent transition, Delayed Detached Eddy Simulation

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MLA
Kubacki, S., and Erik Dick. “Improved Prediction of Low-Pressure Turbine Wake Mixing by Delayed Detached Eddy Simulation, Including an Algebraic Model for Bypass Transition.” INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, vol. 103, 2023, doi:10.1016/j.ijheatfluidflow.2023.109206.
APA
Kubacki, S., & Dick, E. (2023). Improved prediction of low-pressure turbine wake mixing by Delayed Detached Eddy Simulation, including an algebraic model for bypass transition. INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, 103. https://doi.org/10.1016/j.ijheatfluidflow.2023.109206
Chicago author-date
Kubacki, S., and Erik Dick. 2023. “Improved Prediction of Low-Pressure Turbine Wake Mixing by Delayed Detached Eddy Simulation, Including an Algebraic Model for Bypass Transition.” INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW 103. https://doi.org/10.1016/j.ijheatfluidflow.2023.109206.
Chicago author-date (all authors)
Kubacki, S., and Erik Dick. 2023. “Improved Prediction of Low-Pressure Turbine Wake Mixing by Delayed Detached Eddy Simulation, Including an Algebraic Model for Bypass Transition.” INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW 103. doi:10.1016/j.ijheatfluidflow.2023.109206.
Vancouver
1.
Kubacki S, Dick E. Improved prediction of low-pressure turbine wake mixing by Delayed Detached Eddy Simulation, including an algebraic model for bypass transition. INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW. 2023;103.
IEEE
[1]
S. Kubacki and E. Dick, “Improved prediction of low-pressure turbine wake mixing by Delayed Detached Eddy Simulation, including an algebraic model for bypass transition,” INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, vol. 103, 2023.
@article{01HAHKYR1CF4SS3MXX0MDHJFN0,
  abstract     = {{We present a hybrid RANS-LES technique of the Delayed Detached Eddy Simulation (DDES) form for transitional flow through low-pressure turbine blade cascades. A first ingredient is representation in RANS-mode of the flow that approaches the blades and the flow near the blade surfaces. The objective is to provide the correct level of modelled turbulent kinetic energy to an algebraic model for bypass transition which is coupled to a turbulence model, and thus simulation of bypass transition in attached boundary layer state by a RANS-model component. A second ingredient is resolution of the Kelvin-Helmholtz instability of a laminar separated boundary layer in RANS-mode, with transition in RANS-mode by a model component or transition in LES-mode by resolved breakdown. The third ingredient is representation in LES-mode of a wake flow and a separated layer that enters a wake, such that the wake mixing is by resolved fluctuations. For realisation of the RANS-zones and the LESzones, we derive an appropriate sensor function. We demonstrate the good functioning of the technique for transitional flows of different types.}},
  articleno    = {{109206}},
  author       = {{Kubacki, S. and Dick, Erik}},
  issn         = {{0142-727X}},
  journal      = {{INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW}},
  keywords     = {{Fluid Flow and Transfer Processes,Mechanical Engineering,Condensed Matter Physics,Low-pressure turbine cascade,Wake flow,Separation -induced transition,Bypass transition,Algebraic intermittency model,Laminar -to -turbulent transition,Delayed Detached Eddy Simulation}},
  language     = {{eng}},
  pages        = {{15}},
  title        = {{Improved prediction of low-pressure turbine wake mixing by Delayed Detached Eddy Simulation, including an algebraic model for bypass transition}},
  url          = {{http://doi.org/10.1016/j.ijheatfluidflow.2023.109206}},
  volume       = {{103}},
  year         = {{2023}},
}
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