Session: 09-01-12 Experimental Methods

Paper Number: 78985

78985 - On the Real Time Hybrid Modelling of Floating Offshore Wind Turbine Using Ducted Fan(s) 

Real-time hybrid modelling refers to the use, in real-time, of multiple modelling approaches to improve the overall accuracy of the representation of a complex system. In hydrodynamics, numerical models may not be able to capture non-linear effects such as viscous effects, greenwater, slamming, second or higher order loads and usually require calibration against basin model tests. On the other hand, basin model tests may be subject to scale effects or other constraints limiting the number of components that can be modelled, requiring the further use of numerical simulations including all components of the full system. For some applications, couplings between the individual system components are so large that testing separately each component is not representative of the global system’s behaviour. For such applications, the real-time hybrid modelling, mixing in real-time (i.e. in the basin itself) numerical simulations and basin model tests, can solve this issue. This paper presents the application of the real-time hybrid modelling technique to a floating offshore wind turbine.  The first basin tests were performed with a single fan and a turbine model with rigid blades. For the second set of tests, the following improvements were made: on the experimental side, a dual rotating fans system was built and on the software side, the influence of blade flexibility was incorporated. Comparisons between the various modeling assumptions and experimental setups are presented to define the required level of turbine representation based on the objectives of the basin tests.

Presenting Author: Alexandre Cinello Océanide

Authors:

Alexandre Cinello Océanide
François Pétrié Océanide
Benjamin Rousse Océanide
Cédric Le Cunff PRINCIPIA