Overview
I carried out my undergraduate thesis at Universidad Politécnica de Madrid through an Erasmus+ exchange from Northwestern Polytechnical University. The work combined the DLR-TAU flow solver with BiGlobal stability analysis to examine unstable flow behavior.
My supervisors were Prof. Eusebio Valero Sanchez and Prof. Yaguo Lyu.
Cylinder validation
I first used cylinder flow at a Reynolds number of 60 to check the flow calculation and stability analysis. The Strouhal number agreed with the experimental reference in the thesis, and the analysis extracted the dominant mode of the wake.
Eigenvalue spectrum and dominant mode for the cylinder validation case.
Airfoil separation
For the NACA0012 airfoil, I calculated cases across angles of attack from 0° to 19°. In the conditions studied, the separation threshold occurred at 18.9°. Unsteady simulation and frequency analysis supported the extraction and visualization of the dominant instability mode.
Eigenvalue spectrum and dominant velocity mode for the airfoil.
Erasmus+ supported the undergraduate thesis exchange.