Objective
Objectives
The objective of the project is to analyze and clarify the aerodynamic mechanisms underlying the production of blade forces on rotors of wind turbines. For this state-of-the-art Navier-Stokes solvers with appropriate transition and turbulence modelling will be utilized.
Dynamic stall and 3-Dimensional stall will be addressed. A parametrical study will be undertaken in order to elucidate the influence of aspect ratio, twist, chord- and thickness-distribution on the stall characteristics of rotating blades.
Technical Approach
The Navier-Stokes algorithms will be validated against measurements from the available literature and previous Joule projects. Of particular interest will be the assessment of the influence of turbulence models and transition criteria on the solution. Both conventional airfoil shapes and special-purpose wind turbine blades will be considered. It is expected that this task may form the basis for adapting and improving the algorithms to handle massively separated flow fields. Dynamic stall calculations will be performed using 2D and quasi-3D Navier-Stokes algorithms. The most important parameters influencing dynamic stall characteristics are the mean angle of attack and the reduced frequency. To analyze the effect of rotation on 3-dimensional stall characteristics of wind turbine blades a series of Navier-Stokes calculations will be carried out for various blade geometries. As such calculations are very computing demanding, requiring in the order of 1 million mesh points for one blade, only steady calculations will be performed. Of special interest is to clarify the influence of blade planform, twist and airfoil type.
Expected Achievements and Exploitation
It is expected that the project will result in useful information from the following aspects:
- Clarification of the main mechanisms of the production of aerodynamic forces on rotating blades.
- Parametrical study in order to come up with a (simple) strategy for how to exploit the obtained results in existing design tools used by blade designers.
- Validation of the capability of existing CFD codes to calculate viscous flow fields subject to dynamic stall and massive separation.
The two first points are of high importance for blade- and wind turbine manufacturers as they result in a better understanding of how existing wind turbines work aerodynamically as well as giving guidelines for design and optimization of new blade configurations.
The last point results in useful information relevant for other industries dealing with aerodynamic machinery, such as manufacturers of aircraft, propellers and turbo machinery.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- engineering and technology mechanical engineering vehicle engineering aerospace engineering aircraft
- natural sciences physical sciences classical mechanics fluid mechanics fluid dynamics
- engineering and technology environmental engineering energy and fuels renewable energy wind energy
- natural sciences mathematics pure mathematics geometry
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Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
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Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
2800 Lyngby
Denmark
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.