Study of the bifurcation behavior of the flow around a 2D Ahmed body applied to active flow control systems

This master thesis focuses in the study of the application of active flow control in the transitional regime (Re ≈ 3E3) at the rear part of the roof of a 2D Ahmed body geometry. To do so, the natural bifurcations of the problem (which separate the ordered laminar behavior from the first pre-turbulent chaotic behavior) are studied, and different...

Stability Analysis of a Laval Rotor on Hydrodynamic Bearings by Numerical Continuation: Investigating the influence of rotor flexibility, rotor damping and external oil pressure on the rotordynamic behaviour

Self-excited vibrations in Laval rotors supported by hydrodynamic bearings, know as oil whirl, induce friction losses and noise, or may even damage the system. This transient dynamic behaviour is caused by the stable and unstable equilibria in the system. To study this phenomenon, this research uses numerical continuation. This method determines...