Numerical study on the aeroelastic stability of circular cylinders

Kurzfassung

In this master thesis, the aeroelastic stability of circular cylinders is investigated. The study is based on 2D CFD simulations carried out with DLR TAU-Code. Circular cylinders immersed into a steady flow are exposed to fluid forces and aerodynamic instabilities such as vortex-induced vibrations (VIV) and galloping that cause the cylinder to oscillate. The aerodynamic instabilities are induced primarily because of flow separation around the body and the formation of the Von Karman vortex street. This thesis aims to study the efficacy of using spoilers or splitter plates with different lengths and positioned in different positions around the cylinder on suppressing the vortex formation and attenuating the cylinder's oscillation.