Objective
This project will investigate and develop software for the prediction of aerodynamic rotor-tower interactions which occur when the rotor-blades of a Horizontal Axis Wind Turbine interact with the disturbed velocity field of the tower.
This project will study both upwind and downwind rotor cases.
The objectives of the project are:
- to quantify the extent of the aerodynamic effect of the tower on the rotor blades,
- to develop accurate methods which are suitable for use by the industry to predict the effect,
- to study means of alleviating the effect.
The project will focus on stall controlled rotors since the major uncertainties occur in or near the stall regime.
The technical approach to the study will link fundamental experiments, computational fluid dynamics, engineering models and validation by data obtained from operating HAWTs in the field. It will be carried out by a consortium of partners in five EU countries covering manufacture, operation, government and academic research.
Experimental measurements of blade pressures and forces and of the disturbed velocity fields for both both two- and three-dimensional models of the interaction will be obtained at reduced scale from wind tunnel tests, in the latter case using a model twin-bladed turbine, and at full scale by analysis of blade pressure and force data from an instrumented 27m diameter twin-bladed turbine in the field.
Existing Navier-Stokes (CFD) codes, (a) using primitive variables, (b) using a vortex basis will be developed to handle the interaction aerodynamics between a moving rotor and the fixed tower, first at model scale and then at full scale. The blade surface pressure and wake velocity data will be used to aid the development and validation of these codes.
Engineering codes will be further developed and tuned against the CFD codes to incorporate rotor-tower interaction and then tested against measured loads from operating wind turbines. Two types of machine will be monitored for these tests, a series of similar machines having a 40m diameter upwind rotors and a prototype full scale machine having a highly flexible downwind rotor.
An experimental (wind tunnel) study will be carried out into the effect of tower wake suppression or modification devices, such as strakes, fairings and tower porosity, on the strength of the interaction between rotor and tower for both upwind and downwind turbine cases.
The achievements of the project, in order of importance, will be: development and dissemination to the wind turbine industry of improved engineering codes able to predict with greater reliability the magnitude and effects of the rotor-tower interaction,
adapted CFD codes capable of simulating blade tower interaction, detailed experimental data on blade-tower interaction, including data documenting the effectiveness of devices which by acting on the tower flow or its wake reduce or suppress the interaction,
documentation of the ways in which blade-tower interaction can occur together with an improved understanding of the phenomenon, which should feed into future wind turbine designs.
Fields of science (EuroSciVoc)
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CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques.
- natural sciencescomputer and information sciencessoftware
- engineering and technologymechanical engineeringvehicle engineeringaerospace engineeringaircraft
- engineering and technologyenvironmental engineeringenergy and fuelsrenewable energywind power
- natural sciencesphysical sciencesclassical mechanicsfluid mechanicsfluid dynamicscomputational fluid dynamics
- engineering and technologymechanical engineeringvehicle engineeringaerospace engineeringaeronautical engineering
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Topic(s)
Call for proposal
Data not availableFunding Scheme
CSC - Cost-sharing contractsCoordinator
SW7 2BY LONDON
United Kingdom