Journal article
The flow upstream of a row of aligned wind turbine rotors and its effect on power production : The flow upstream of a row of aligned wind turbine rotors and its effect on power production
The blockage developing in front of a laterally aligned row of wind turbines and its impact on power production over a single turbine was analysed using two different numerical methods. The inflow direction was varied from orthogonal to the row until 45◦, with the turbines turning into the wind, thereby resembling a wind turbine testing site or row in a wind park.
The numerical methods included computational fluid dynamics (CFD) with an actuator disc representation of the rotor and a simple vortex method. The forces on the actuator disc were either derived from airfoil data of a modern wind turbine or set as constant. For all methods significant changes were found in the developing flow-field with corresponding effects on the individual power output of the wind turbines.
These became more pronounced with increasing inflow angle and predicted a rise in power of up to 2% for the downstream and -1% for the upstream turbines. The vortex method agreed with the CFD method on the overall trend, but its magnitude was lower.
Language: | English |
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Year: | 2017 |
Pages: | 63-77 |
ISSN: | 10954244 and 10991824 |
Types: | Journal article |
DOI: | 10.1002/we.1991 |
ORCIDs: | Meyer Forsting, Alexander Raul and Gaunaa, Mac |