DNS and LES of the flow over the T106C turbine using the high-order FR/CPR method

Alhawwary, Mohammad A.; Wang, Zhi Jian

doi:10.2514/6.2020-1572

Cited by 9 publications

(9 citation statements)

References 49 publications

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“…The specifics of this technique can be found in Ref. [35]. The PSD of the variable F is defined by [35]:  The size of separation is reduced if the Reynolds number is increased.…”

Section: Resultsmentioning

confidence: 99%

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High-resolution direct numerical simulations of flow structure and aerodynamic performance of wind turbine airfoil at wide range of Reynolds numbers

Nakhchi

Naung

Rahmati

2021

Energy

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“…The specifics of this technique can be found in Ref. [35]. The PSD of the variable F is defined by [35]:  The size of separation is reduced if the Reynolds number is increased.…”

Section: Resultsmentioning

confidence: 99%

“…[35]. The PSD of the variable F is defined by [35]:  The size of separation is reduced if the Reynolds number is increased. It is also observed that vortex structures and vortex shedding frequencies are smaller at higher Reynolds number.…”

Section: Resultsmentioning

confidence: 99%

High-resolution direct numerical simulations of flow structure and aerodynamic performance of wind turbine airfoil at wide range of Reynolds numbers

Nakhchi

Naung

Rahmati

2021

Energy

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“…To the best knowledge, the only flow condition simulated with DNS or QDNS is a Reynolds number of 80,000 and the lowest level of turbulence intensity (0.8%). The three groups of authors that have done this simulation are Hillewaert et al (2014), Garai et al (2016) and Alhawwary and Wang (2020). They all have shown similar results and that there are some discrepancies between the high fidelity simulation and the experimental measurements.…”

Section: Introductionmentioning

confidence: 83%

The Effect of Reynolds Number on the Flow Around the T106C Very High Lift Low PressureTurbine Linear Cascade

Dufau,

Marty,

Piot

et al. 2023

European Conference on Turbomachinery Fluid Dynamics and Thermodynamics

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Low pressure turbines flows are highly dependent on the boundary layer transition and laminar separation because of the low Reynolds number environment and the high blade loading. In the case of a laminar separation, the transition of the shear layer is triggered by instabilities and a recirculation zone appears near the wall. This phenomenon is known as a laminar separation bubble. Depending on its characteristics, the laminar separation bubble can be categorized as open, long or short. Some experiments performed at the von Karman Institute investigated the effect of Reynolds number on the topology of the separation bubble over the suction side of the very high lift T106C blade. In a previous work, the authors have performed a high fidelity simulation on this configuration at the Reynolds number of 100 000 and shown some discrepancies with the experiments. In order to deepen this study, three others simulations at three higher Reynolds numbers have been performed. Thus a wider comparison between QDNS (Quasi Direct Numerical Simulation) and the experiments is proposed in this paper. Moreover, the simulations give a more detailed descriptions of the effect of Reynolds number on the laminar separation bubble. Finally, we discuss the flow predicted by RANS simulations by making a comparison with the flow computed with the QDNS with the intention of validating the γ-Re θt transition model on low pressure turbine cases.

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“…The details of this method are provided in Ref. [49]. The PSD of any parameter G can be expressed as [49]:…”

Section: Validation Of the Methodsmentioning

confidence: 99%

DNS of secondary flows over oscillating low-pressure turbine using spectral/hp element method

Nakhchi

Naung

Rahmati

2020

International Journal of Heat and Fluid Flow

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DNS and LES of the flow over the T106C turbine using the high-order FR/CPR method

Cited by 9 publications

References 49 publications

High-resolution direct numerical simulations of flow structure and aerodynamic performance of wind turbine airfoil at wide range of Reynolds numbers

High-resolution direct numerical simulations of flow structure and aerodynamic performance of wind turbine airfoil at wide range of Reynolds numbers

The Effect of Reynolds Number on the Flow Around the T106C Very High Lift Low PressureTurbine Linear Cascade

DNS of secondary flows over oscillating low-pressure turbine using spectral/hp element method

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