an integrated wake/rotor model - just another wordpress site · 1stfc rutherford appleton...
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What issue does this research
address? The calcula)on of dynamic load cases for a wind turbine opera)ng in an offshore array, including both the structural and aerodynamic response to unsteady flow condi)ons.
Dr Geoff Dutton1, David Hankin1,2 & Professor J. Michael R. Graham2 1STFC Rutherford Appleton Laboratory; 2Imperial College London
What method does this research use? The developed model couples an unsteady formula)on of the vortex la>ce panel method, developed at Imperial College London, with a structural dynamic blade model , developed using Abaqus at STFC-‐RAL, to enable soH-‐coupled fully unsteady aeroelas)c simula)ons.
An integrated wake/rotor model
David Hankin +44 (0)1235 445 785
[email protected] +44 (0)1235 445 823 Dr Geoff Du0on
What results were found? The two models have been successfully linked. However there exists an instability in the torque moment. An itera)ve restart posi)on has been implemented to ensure the forces and displacements in both models are converged at the start of the simula)on, but the instability is only delayed rather than removed. Comparison with the original quasi-‐steady 2D aerodynamics shows reasonable agreement prior to the instability. Spectral analysis indicates that the principle difference is in the 2nd flap and 1st torsional modes.
What is the impact of this research to the wind industry? The combined aeroelas)c model can be used by wind farm developers to inves)gate dynamic load cases during the design of new wind turbines.
Professor J. Michael R. Graham +44 (0)207 594 5074 [email protected]