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Bachelor thesis: Literature research on unsteady effects at pitching, plunging, and surging airfoils

27. September 2020


The aerodynamics of steady flows around airfoils is, for the most part, properly understood and the theoretical framework has been validated by numerous experiments. However, many techni- cal applications operate in highly unsteady fl ows. The added time dependency alters the steady state solution and has far-reaching efects on theory and practical purposes. Some examples are airplanes, Horizontal- and Vertical Axis Wind Turbines (HAWT's & VAWT's), helicopters, underwater vehicles, and Micro Air Vehicles (MAV's). Variations in freestream velocity and in angle of incidence cause signi cant deviations from steady fl ow conditions depending on am- plitude and frequency of the unsteady motion. Despite extensive efforts in understanding the nature of unsteady flow effects experimentally and numerically, the accurate prediction of the unsteady aerodynamic forces remains challenging.
 

Master's thesis: Development of airfoil pitch test rig for the large towing tank at the TU Berlin

27. September 2020


The towing tank research team focuses on the investigation of the flow dynamics around two dimensional airfoils at instationary conditions. Oscillatory changes in freestream velocity and angle of incidence cause significant deviations from the steady flow conditions. These deviations highly depend on amplitude and frequency of the unsteady motion. Three types of motion can be defined: surge, pitch, and plunge, which significantly influence the flow physics and cause unsteady loads.
 

QBlade Thesis

25. April 2012



 

Bachelor thesis: Literature research on unsteady effects at pitching, plunging, and surging airfoils

The aerodynamics of steady flows around airfoils is, for the most part, properly understood and the theoretical framework has been validated by numerous experiments. However, many techni- cal applications operate in highly unsteady fl ows. The added time dependency alters the steady state solution and has far-reaching efects on theory and practical purposes. Some examples are airplanes, Horizontal- and Vertical Axis Wind Turbines (HAWT's & VAWT's), helicopters, underwater vehicles, and Micro Air Vehicles (MAV's). Variations in freestream velocity and in angle of incidence cause signi cant deviations from steady fl ow conditions depending on am- plitude and frequency of the unsteady motion. Despite extensive efforts in understanding the nature of unsteady flow effects experimentally and numerically, the accurate prediction of the unsteady aerodynamic forces remains challenging.
more...
 

Master's thesis: Development of airfoil pitch test rig for the large towing tank at the TU Berlin

The towing tank research team focuses on the investigation of the flow dynamics around two dimensional airfoils at instationary conditions. Oscillatory changes in freestream velocity and angle of incidence cause significant deviations from the steady flow conditions. These deviations highly depend on amplitude and frequency of the unsteady motion. Three types of motion can be defined: surge, pitch, and plunge, which significantly influence the flow physics and cause unsteady loads.
more...
 

QBlade Thesis

more...