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Verification of Boundary Conditions Applied to Active Flow Circulation Control

VZLU—Czech Aerospace Research Centre, 199 05 Prague, Czech Republic
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Aerospace 2019, 6(3), 34; https://doi.org/10.3390/aerospace6030034
Received: 30 November 2018 / Revised: 2 March 2019 / Accepted: 4 March 2019 / Published: 8 March 2019
(This article belongs to the Special Issue 8th EASN-CEAS Workshop on Manufacturing for Growth and Innovation)
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Abstract

Inclusion of Active Flow Control (AFC) into Computational Fluid Dynamics (CFD) simulations is usually highly time-consuming and requires extensive computational resources and effort. In principle, the flow inside of the fluidic AFC actuators should be incorporated into the problem under consideration. However, for many applications, the internal actuator flow is not crucial, and only its effect on the outer flow needs to be resolved. In this study, the unsteady periodic flow inside the Suction and Oscillatory Blowing (SaOB) actuator is analyzed, using two CFD methods of ranging complexity (URANS and hybrid RANS-LES). The results are used for the definition and development of the simplified surface boundary condition for simulating the SaOB flow at the actuator’s exit. The developed boundary condition is verified and validated, in the case of a low-speed airfoil with suction applied on the upper (suction) side of the airfoil and oscillatory blowing applied on the lower (pressure) side, close to the trailing edge—a fluidic Gurney flap. Its effect on the circulation is analyzed and compared to the experimental data. View Full-Text
Keywords: computational fluid dynamics; active flow control; suction and oscillatory blowing actuator; circulation control computational fluid dynamics; active flow control; suction and oscillatory blowing actuator; circulation control
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Vrchota, P.; Prachař, A.; Hospodář, P. Verification of Boundary Conditions Applied to Active Flow Circulation Control. Aerospace 2019, 6, 34.

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