On Numerical Simulations of Turbulent Flows over a Bluff Body with Aerodynamic Flow Control Based on Trapped Vortex Cells: Viscous Effects
Turbulent flows over a semi-circular cylinder (a limiting case of a thick airfoil with a chord equal to the diameter base) are investigated using high-fidelity large-eddy simulations at a diameter-based Reynolds number, Re = 130,000, Mach number, M = 0.05, and a zero angle of attack. The aerodynamic...
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MDPI AG
2025-05-01
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| Series: | Fluids |
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| Online Access: | https://www.mdpi.com/2311-5521/10/5/120 |
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| author | Dmitry A. Lysenko |
| author_facet | Dmitry A. Lysenko |
| author_sort | Dmitry A. Lysenko |
| collection | DOAJ |
| description | Turbulent flows over a semi-circular cylinder (a limiting case of a thick airfoil with a chord equal to the diameter base) are investigated using high-fidelity large-eddy simulations at a diameter-based Reynolds number, Re = 130,000, Mach number, M = 0.05, and a zero angle of attack. The aerodynamic flow control system, designed with two trapped vortex cells, achieves a complete non-separated flow over the bluff body, except for low-scale turbulence effects, reaching approximately 80% of the theoretical lift coefficient limit (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>2</mn><mi>π</mi></mrow></semantics></math></inline-formula> for the half-circular airfoil). Viscous effects are analyzed using the conventional Reynolds-averaged Navier–Stokes approach for a broad range of Reynolds numbers, 75,000 ≤ Re ≤ 1,000,000. Numerical results demonstrate that the aerodynamic properties of the implemented concept are independent of the Reynolds number within this interval, highlighting its significant potential for further development. |
| format | Article |
| id | doaj-art-bfd2cc72c65142cfa935ee2fd1617d78 |
| institution | OA Journals |
| issn | 2311-5521 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
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| series | Fluids |
| spelling | doaj-art-bfd2cc72c65142cfa935ee2fd1617d782025-08-20T02:33:56ZengMDPI AGFluids2311-55212025-05-0110512010.3390/fluids10050120On Numerical Simulations of Turbulent Flows over a Bluff Body with Aerodynamic Flow Control Based on Trapped Vortex Cells: Viscous EffectsDmitry A. Lysenko03DMSimtek AS, 4056 Tananger, NorwayTurbulent flows over a semi-circular cylinder (a limiting case of a thick airfoil with a chord equal to the diameter base) are investigated using high-fidelity large-eddy simulations at a diameter-based Reynolds number, Re = 130,000, Mach number, M = 0.05, and a zero angle of attack. The aerodynamic flow control system, designed with two trapped vortex cells, achieves a complete non-separated flow over the bluff body, except for low-scale turbulence effects, reaching approximately 80% of the theoretical lift coefficient limit (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>2</mn><mi>π</mi></mrow></semantics></math></inline-formula> for the half-circular airfoil). Viscous effects are analyzed using the conventional Reynolds-averaged Navier–Stokes approach for a broad range of Reynolds numbers, 75,000 ≤ Re ≤ 1,000,000. Numerical results demonstrate that the aerodynamic properties of the implemented concept are independent of the Reynolds number within this interval, highlighting its significant potential for further development.https://www.mdpi.com/2311-5521/10/5/120large-eddy simulationaerodynamic flow controltrapped vortex cellscomputational fluid dynamics |
| spellingShingle | Dmitry A. Lysenko On Numerical Simulations of Turbulent Flows over a Bluff Body with Aerodynamic Flow Control Based on Trapped Vortex Cells: Viscous Effects Fluids large-eddy simulation aerodynamic flow control trapped vortex cells computational fluid dynamics |
| title | On Numerical Simulations of Turbulent Flows over a Bluff Body with Aerodynamic Flow Control Based on Trapped Vortex Cells: Viscous Effects |
| title_full | On Numerical Simulations of Turbulent Flows over a Bluff Body with Aerodynamic Flow Control Based on Trapped Vortex Cells: Viscous Effects |
| title_fullStr | On Numerical Simulations of Turbulent Flows over a Bluff Body with Aerodynamic Flow Control Based on Trapped Vortex Cells: Viscous Effects |
| title_full_unstemmed | On Numerical Simulations of Turbulent Flows over a Bluff Body with Aerodynamic Flow Control Based on Trapped Vortex Cells: Viscous Effects |
| title_short | On Numerical Simulations of Turbulent Flows over a Bluff Body with Aerodynamic Flow Control Based on Trapped Vortex Cells: Viscous Effects |
| title_sort | on numerical simulations of turbulent flows over a bluff body with aerodynamic flow control based on trapped vortex cells viscous effects |
| topic | large-eddy simulation aerodynamic flow control trapped vortex cells computational fluid dynamics |
| url | https://www.mdpi.com/2311-5521/10/5/120 |
| work_keys_str_mv | AT dmitryalysenko onnumericalsimulationsofturbulentflowsoverabluffbodywithaerodynamicflowcontrolbasedontrappedvortexcellsviscouseffects |