Flow control of the semicircular airfoil with a vortex cell at slot suction of air and its blowout into the near wake

Исаев, С. А.; Baranov, P. A.; Smurov, Mikhail; Sudakov, A. G.; Shebelev, A. V.

doi:10.1134/s0869864316050024

Cited by 9 publications

(3 citation statements)

References 3 publications

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“…Placement of a vortex cell on the surface of a semicircular airfoil with slit suction and ejection into the near wake leads to the reconstruction of the unsteady separation pattern of low-velocity flow around the airfoil [15]. In this case, the flow separation point shifts to the trailing edge of the airfoil, the lift from ultra-low negative becomes positive, and the drag is halved.…”

Section: Of 16mentioning

confidence: 99%

Control of Aerodynamic Characteristics of Thick Airfoils at Low Reynolds Numbers Using Energy Methods

Bulat,

Chernyshov,

Prodan

et al. 2023

Preprint

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The flow around thick airfoils at low Reynolds numbers and the possibility of using energy methods to control flowfield, increase lift and reduce drag are considered. For calculations, a series of propulsion airfoils is used, obtained by a combination of solving the inverse problem of aerodynamics and stochastic methods of global optimization. The calculations take into account the transition from the laminar flow regime to the turbulent one, which has a significant effect on the lift and airfoil drag. The applicability of various turbulence models for airfoil modelling at low Reynolds numbers is discussed. The results of numerical simulation make it possible to determine the dependence of the lift coefficient on the angle of attack and the optimal flow rate of air taken from the airfoil surface for each angle of attack. The results of numerical simulation are compared with the data of a physical experiment, and conclusions are drawn about the accuracy of various turbulence models.

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Section: Of 16mentioning

confidence: 99%

Control of Aerodynamic Characteristics of Thick Airfoils at Low Reynolds Numbers Using Energy Methods

Bulat,

Chernyshov,

Prodan

et al. 2023

Preprint

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show abstract

“…Placing a vortex cell on a semicircular airfoil's surface, accompanied by slit suction and ejection into the nearby wake, results in reconstructing the low-velocity flow's unsteady separation pattern around the airfoil [20]. The separation point of the flow shifts to the airfoil's trailing edge, and the lift changes from ultra-low negative to positive, while the drag is decreased by half.…”

Section: Introductionmentioning

confidence: 99%

Control of Aerodynamic Characteristics of Thick Airfoils at Low Reynolds Numbers Using Methods of Boundary Layer Control

Bulat,

Chernyshov,

Prodan

et al. 2024

Fluids

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The article explores flow behavior around thick airfoils at low Reynolds numbers and the potential application of energy methods to manipulate the flow field for increased lift and reduced drag. The study relies on a set of propulsion airfoils calculated using a combined approach of solving the inverse problem of aerodynamics and applying stochastic global optimization methods. The calculations consider the transition from laminar to turbulent flow regimes, which significantly affects lift and airfoil drag. The suitability of different turbulence models for airfoil modeling in low Reynolds numbers is discussed, and numerical simulation results determine the lift coefficient dependence on angle of attack and the optimal air flow rate taken from the airfoil surface for each angle of attack. The accuracy of different turbulence models is analyzed by comparing numerical simulation results to physical experiment data.

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“…This is of key interest, for instance, for efficient ventilation and cooling in gas turbines [4], microelectronics, and other industries, as well as to design actuators actively affecting the flow (see e.g. [5,6]) to reduce the skin friction, the aircraft drag, to increase the lift force and, therefore, to save fuel.…”

Section: Introductionmentioning

confidence: 99%

Modeling of plane jet at moderate Reynolds numbers

Yakovenko¹

2017

AIP Conference Proceedings

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Flow control of the semicircular airfoil with a vortex cell at slot suction of air and its blowout into the near wake

Cited by 9 publications

References 3 publications

Control of Aerodynamic Characteristics of Thick Airfoils at Low Reynolds Numbers Using Energy Methods

Control of Aerodynamic Characteristics of Thick Airfoils at Low Reynolds Numbers Using Energy Methods

Control of Aerodynamic Characteristics of Thick Airfoils at Low Reynolds Numbers Using Methods of Boundary Layer Control

Modeling of plane jet at moderate Reynolds numbers

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