Experimental analysis of wave propagation at buffet flows
In human phonation, fluid-structure interaction between the air from the lungs (fluid) and the laryngeal tissues (structure) leads to a self-sustained oscillation of the vocal folds (consisting of muscle, mucosa, and ligament). The oscillation modulates the supraglottal pressure by interrupting the airflow which produces the sound of the voice. The...
Auf der Seite der Strömungsmechanik haben sich die Löser auf der Basis der Reynolds-gemittelten Navier-Stokes Gleichungen als die effizientesten zur Vorhersage einfacherer und in der Regel stationärer Zustände herausgestellt. Ihr Einsatz für instationäre Strömungen, die bei interdisziplinären Problemstellungen häufiger vorkommen, ist jedoch auf Gru...
This thesis deals with the flow field at a two-dimensional SERN-Nozzle. Main focus lies on the flow around the nozzle flap and the occurring separation of the boundary-layer of the outer flow. The objective is to get a better understanding of the interacting flow fields and to improve the nozzle performance by an optimized flap geometry. In particu...
Starting from a Finite-Volume Method solving the Navier-Stokes equations for compressible fluid flow and a Finite-Element Method based on quasi one-dimensional Timoshenko beam elements for structural dynamics, a numerical method for coupled aeroelastic problems of flight vehicles is developed. Using the method, extended aerodynamic stability deriva...
The direct numerical simulation of fluid-structure-interaction has received a lot of attention in recent years. Due to the growing size of planned commercial airplanes and the widespread use of lightweight-structures leading to large elastic deflections in flight, great interest of commercial applications of such simulation techniques has developed...