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Projecte llegit

Títol: Assessment of Active Flow Control techniques to prevent airfoil stall

Estudiants que han llegit aquest projecte:

Director/a: MELLIBOVSKY ELSTEIN, FERNANDO PABLO

Departament: FIS

Títol: Assessment of Active Flow Control techniques to prevent airfoil stall

Data inici oferta: 17-07-2023     Data finalització oferta: 17-03-2024


Estudis d'assignació del projecte:
    GR ENG SIST AEROESP
Tipus: Individual
 
Lloc de realització: EETAC
 
Paraules clau:
SJA AFC NACA0012 stall RANS
 
Descripció del contingut i pla d'activitats:
 
Overview (resum en anglès):
Active Flow Control (AFC) techniques are currently being in the spotlight of researchers because of its capabilities to improve significantly the aerodynamic performance of airfoils. This bachelor thesis focuses on the use of Synthetic Jet Actuators (SJA) to improve the performance of the NACA 0012 profile at post-stall angles of attack and high Reynolds numbers. This purpose was carried on by performing Computational Fluid Dynamics (CFD) simulations using pisoFoam, a transient Reynolds-Averaged Navier-Stokes (RANS) solver, and using the Spalart-Allmaras (S-A) turbulence model. The mesh consisted in a hybrid (containing unstructured and structured grids) C-type mesh, widely used for airfoil simulations. The studied airfoil was the NACA 0012 profile in the post-stall angle of attack alpha=19º at a Reynolds number Re=2e6. After performing a mesh dependence study, comparing the results with experimental wind tunnel literature, the SJA actuated simulations were performed. The results concluded that the use of SJA could significantly improve the aerodynamics of the non-actuated case, finding that the non-dimensional frequency F+ and the momentum coefficient C_mu of the jet had a major impact on the behavior of the airflow, specially influenced by the latter.

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