Dynamic inflow effects occur due to the rapid change of the rotor loading under conditions such as fast pitch steps. The paper presents a setup suitable for the investigation of those effects for non-axisymmetric rotor conditions, namely individual pitch steps. Furthermore, insights into the relevant …

The dynamic inflow effect describes the unsteady aerodynamic response to fast changes in rotor loading due to the inertia of the wake. Fast changes in turbine loading due to pitch actuation or rotor speed transients lead to load overshoots. The phenomenon is suspected to be also relevant for gust situations; …

This study originates from an increasing demand for seaweed cultivation. HZ University of Applied Sciences, together with farmers, under the umbrella “Living Lab Schouwen Duiveland” will conduct a field study to assess the possibilities for introducing brown seaweed cultivation at or near existing mussel …

Rotor morphing has been investigated in the past for improvement of rotor performance, either for reduction of rotor power demand or for vibratory load alleviation. The present study investigates the application of camber morphing for improvement of rotor performance in hover and vertical flight conditions, …

To analyze on-water rowing performance, a valid determination of the power loss due to the generation of propulsion is required. This power los can be calculated as the dot product of the net water force vector ( ~ F w;o ) and the time derivative of the position vector of the point at the blade where …

Blades worden gebruikt bij hardlopen en verspringen door protheselopers. Bij langdurig gebruik kan de stijfheid van een blade afnemen. De stijfheid kan invloed hebben op de stapfrequentie, de contacttijd en de hoek van de blade ten opzichte van de grond. Door veranderingen in deze factoren moet de atleet …

This research proposes new structural lay-outs for large wind turbine blades. The lay-outs were found by an optimisation method where the aerodynamics of wind turbine blades was combined with the structural model of the blade, formulated in a corotational framework. The aeroelastic blade loads were calculated …

Gedurende de afstudeerstage zijn er door de student vermoeiingstesten gedaan op glasvezel-APA6 composiet. Allereerst zal er op hoofdlijnen de achterliggende theorie besproken worden welke gedurende de literatuurstudie geraadpleegd zijn. Vervolgens zijn de proefstukken beschreven van geometrie tot productie. …

Om meer inzicht te krijgen in de eigenschappen van running blades is dit onderzoek verricht. Dit is gedaan aan de hand van de volgende onderzoeksvragen: 1. Wat zijn de stijfheden van de verschillende categorieën blades bij verschillende hoeken? 2. Wat is de invloed van de lengte van het onderbeen op …

Turbine blade cooling has been a topic of significant interest, as increasing turbine entry temperatures result in higher cooling requirements. The present numerical method divides the blade into a finite number of elements in the span and peripheral directions and solves the heat transfer fundamental …