E3S Web of Conferences
Volume 5, 20152nd Symposium on OpenFOAM® in Wind Energy
|Number of page(s)||13|
|Section||Site Assessment and Wind Plant Aerodynamics|
|Published online||16 October 2015|
On Offshore wind turbine fatigue caused by wave influenced wind
1 University of Stavanger/StormGeo, 4010 Stavanger
2 NTNU/Statkraft, 7491 Trondheim, Norway
3 Acona Flow Technology, 3936 Porsgrunn, Norway
a Corresponding author: email@example.com
A wave influenced wind turbine simulator (WIWiTS) is developed and results from these simulations are used for fatigue analyses. WIWiTS is based on the Simulator fOr Wind Farm Application (SOWFA) developed at NREL. The simulations are transient with an unsteady Reynolds-Averaged Navier-Stokes (URANS) approach. An actuator line representation of the turbine is placed in a domain where the wave and wind are either aligned with each other or opposed to each other. Simulations with four different wave states are compared to a reference case with no waves, but the inlet wind is the same for all cases. The wave will influence the wind field, which in turn affects the damage equivalent load both at the blade root and at the tower base. In a relatively low wind regime (8 m/s in a height of 400 m) our simplified simulations show that the wave influenced wind increase the fatigue damage compared to a situation with no waves, especially for the cases where the wave opposes the wind field.
© Owned by the authors, published by EDP Sciences, 2015
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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