Transitional Delayed Detached-Eddy Simulation of Multielement High-Lift Airfoils

Coder, James G.; Ortiz-Melendez, Hector D.

doi:10.2514/1.c035161

Cited by 16 publications

(2 citation statements)

References 25 publications

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“…This is traditionally where most models struggle to capture the right amount of separation. Even recent DDES attempts [58] did not show the appropriate drop in lift after stall. A possible explanation for the success of the proposed model is that it removes the damping effect of a thick RANS layer near the wall that is inherent in DES approaches, and the inner boundary layer is therefore favourably affected by the unsteadiness of the outer layer.…”

Section: Fig 6 Contours Of Velocity Magnitude ( / ∞ ) Around the Md-3...mentioning

confidence: 91%

Large-Eddy Simulation with Modeled Wall Stress for Complex Aerodynamics and Stall Prediction

et al. 2021

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The aerodynamics of aircraft high-lift devices at near-stall conditions is particularly difficult to predict numerically. The computational requirements for accurate wall-resolved Large-Eddy Simulations are currently prohibitive, whilst RANS models are generally reliable only for low angles of attack with fully-attached boundary layers. Methods such as DES resolve unsteadiness of the outer boundary layer and can predict separation, but they rely upon a thick RANS layer and highly-stretched cells which damp the resolved turbulent fluctuations near the wall. An alternative approach, adopted here, is to extend the LES down to the wall, employing a relatively large near-wall normal grid spacing and avoiding grid stretching and high aspect ratios near the wall. A boundary condition then applies the correct wall shear stress as

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Section: Fig 6 Contours Of Velocity Magnitude ( / ∞ ) Around the Md-3...mentioning

confidence: 91%

Large-Eddy Simulation with Modeled Wall Stress for Complex Aerodynamics and Stall Prediction

et al. 2021

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show abstract

“…It showed that the DDES model better resolved the unsteady behavior, especially at fully separated flow. Coder and Ortiz-Melendez [39] coupled the Amplification Factor Transport (AFT) transition model with the DDES model to predict the high lift aerodynamic flow over a threeelement MD 30P/30N airfoil; the results showed a more consistent agreement with the experimental reference. Jeans et al [40] used the DDES model to study the aerodynamic characteristics of a generic fighter and analyze the nonlinear behavior.…”

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confidence: 96%

High-Order Delayed Detached Eddy Simulation of Separated Flow with Self-Adaptive Dissipation

Liu

Wang

2021

Journal of Aircraft

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Improved hybrid model for transitional separated flows over a rough compressor blade

Qiao

Shen

Li³

et al. 2023

Aerospace Science and Technology

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Transitional Delayed Detached-Eddy Simulation of Multielement High-Lift Airfoils

Cited by 16 publications

References 25 publications

Large-Eddy Simulation with Modeled Wall Stress for Complex Aerodynamics and Stall Prediction

Large-Eddy Simulation with Modeled Wall Stress for Complex Aerodynamics and Stall Prediction

High-Order Delayed Detached Eddy Simulation of Separated Flow with Self-Adaptive Dissipation

Improved hybrid model for transitional separated flows over a rough compressor blade

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