Assessment of algebraic and one-equation turbulence models for the transonic turbulent flow around a full aircraft configuration

Gacherieu, Cyril; Webert, C.

doi:10.2514/6.1998-2737

Cited by 7 publications

(2 citation statements)

References 3 publications

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“…The additional turbulence stresses are then treated by increasing the molecular viscosity with an eddy viscosity. Among the classical closure models following the RANS approach that have been extensively used one finds: standard k − « and SSTk − u [28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Assessment of RANS turbulence closure models for predicting airflow in neutral ABL over hilly terrain

Amahjour

Khamlichi

2021

IRASE

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Implementing wind farms in heights of a hilly terrain where wind speed is expected to be large may be viewed as a means to increase wind energy production without occupying fertile lands. Micro sitting of a wind farm in these conditions can gain dramatically from CFD simulation of fluid flow in the ABL above complex topography. However, this issue still poses tough challenges regarding the turbulence model to be used and the way to operate the near wall treatment in the presence eventually of separation. In this work, prediction capacity of RANS turbulence models was studied for a typical hill under the assumption of steady state and incompressible airflow regime in neutral ABL. Two models were analyzed by using COMSOL Multiphysics software packages. These included standard , and shear-stress transport . The most up-to-date procedures dedicated to near wall treatment were applied along with refined closer coefficients adjusted for the particular case of ABL. Considering wind tunnel test data, performance of the previous models was discussed in terms of converging mesh, computational time, reattachment point position and propensity of the model to retrieve the right level of turbulence flow in conditions of neutral stratifications. Then, a numerical simulation of the turbulent airflow over two slopes shapes of the symmetry hill by the validation of the experimental data has been then carried out. Both turbulence models agree well with air-velocity tested windward of the hills H3 and H5. Therefore, it was found that the standard model performs very well at the different positions of the low slope hill, and at the summit of a steep hill, but it over-predicts wind speed close to the wall, which requires an improvement of the near-wall treatment. However, the model in neutral case of the ABL was given consistent simulation results with experimental data for prediction of the flow separation and recirculation region at the leeward side of a steep hill, whereas standard model under the neutral condition and the model by using standard coefficients were failed to predict accurately detailed characteristics of recirculation region process.

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Section: Introductionmentioning

confidence: 99%

Assessment of RANS turbulence closure models for predicting airflow in neutral ABL over hilly terrain

Amahjour

Khamlichi

2021

IRASE

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“…This may be mainly due to the inadequacy of the turbulence modeling. The Baldwin-Lomax model is based on the empirical mixing length assumption and is more reliable for attached ows in equilibrium [23]. In the transonic channel, the ow is separated after the throat, which makes the performance of the Baldwin-Lomax model not as good as the second and the third cases with ow attached.…”

Section: Transonic Channel Owmentioning

confidence: 99%

Calculations of 3D compressible flows using an efficient low diffusion upwind scheme

Zha

2004

Int. J. Numer. Meth. Fluids

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SUMMARYA newly suggested E-CUSP upwind scheme is employed for the ÿrst time to calculate 3D ows of propulsion systems. The E-CUSP scheme contains the total energy in the convective vector and is fully consistent with the characteristic directions. The scheme is proved to have low di usion and high CPU e ciency. The computed cases in this paper include a transonic nozzle with circular-to-rectangular cross-section, a transonic duct with shock wave=turbulent boundary layer interaction, and a subsonic 3D compressor cascade. The computed results agree well with the experiments. The new scheme is proved to be accurate, e cient and robust for the 3D calculations of the ows in this paper.

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Time-accurate fluid-structure coupling for turbulent flows

Darracq

Champagneux

Corjon

Sixteenth International Conference on Numerical Methods in Fluid Dynamics

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This paper presents the development of an efficient implicit upwind multi-domain block-structured solver for aeroelastic computations of unsteady turbulent transonic flows around airfoils in arbitrary motion. The resolution of the structural system resolution is performed with an unconditionnaUy stable algorithm. Computations of two test cases with forced oscillation and one with flutter are analyzed.

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Assessment of algebraic and one-equation turbulence models for the transonic turbulent flow around a full aircraft configuration

Cited by 7 publications

References 3 publications

Assessment of RANS turbulence closure models for predicting airflow in neutral ABL over hilly terrain

Assessment of RANS turbulence closure models for predicting airflow in neutral ABL over hilly terrain

Calculations of 3D compressible flows using an efficient low diffusion upwind scheme

Time-accurate fluid-structure coupling for turbulent flows

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