Effects of platform induced pitching motion on the aerodynamics of a FOWT

The hunt for new methods to harness wind energy is at an all-time high as wind energy quickly overtakes other renewable energy sources. Deep waters are promising alternatives with higher average wind speed (thus, higher yields) and also due to lesser availability of land on shore. Even though the design of the blades and rotor of a FOWT is...

Experimental study of dynamic inflow conditions of an actuator disc

The main objective of this master’s thesis is to experimentally investigate the effects of dynamic inflow conditions on the wake of an actuator disc. Dynamic inflow is the unsteady wake in momentum theory. Dynamic inflow can experimentally be generated by a gust generator. During the experiments, in which Particle Image Velocimetry (PIV) was...

Incremental Backstepping Control for Helicopters: Investigating the effect of dynamic inflow modelling on incremental backstepping controller performance

Due to their highly coupled and non-linear behavior, helicopters seem excellent subjects to apply non-linear control theory to. Furthermore, the rotor is operating in its own wake, leading to complex aerodynamics. A Command Filtered Incremental Backstepping controller has been applied to a simulation model of an MBB Bo-105 hingeless rotorcraft....

CFD study of induction and finite blade effect on a floating horizontal-axis wind turbine

As the need for abundant and reliable renewable energy increases, there is a growing interest in floating wind turbines, which would allow to harness the wind resource in areas where bottom-founded wind turbines cannot be used. However, the movements of the platform are expected to cause unsteady aerodynamics effects, including different wake...

Dynamic Wind Speed in Dynamic Inflow Models

In the case of unsteady loading conditions at a rotor, the induced velocity response lags the thrust coefficient at the rotor. The two parameters that are responsible for unsteady loading conditions are rotor thrust (due to blade pitch, or rotational speed) and incoming wind speed. The induced velocity response to these two sources of...

Experimental Analysis of an Actuator Disk under cyclic unsteady loading

Experimental Analysis of an Actuator Disk under cyclic unsteady loading.<br/>Wind Energy is one of the cleanest forms of energy. It does not contribute to the greenhouse gases and is also one of the least expensive forms of renewable energy. Due to this, number of wind turbines are increasing annually. Therefore, it is crucial to understand the...