Linné Centre
Gotland University
Wind Turbine Wake Models
Stefan Ivanell
Associate Professor
Director of Energy Technology, Gotland University
Dep. of Mechanics, FLOW, KTH
www.ivanell.se 9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 1
Linné Centre
Gotland University
• Background - Wake Activities
• Basic Wake Research
• Turbine Interaction-Farm optimization
• Farm-Farm Interaction
Outline
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 2
Linné Centre
Gotland University
• Background - Wake Activities
• Basic Wake Research
• Turbine Interaction-Farm optimization
• Farm-Farm Interaction
Outline
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 3
Linné Centre
Gotland University
Nordic Consortium
Teknikgruppen AB
~ 15 Senior researcher
7 PhD students
Nordic Consortium:
Optimization and Control of Wind Farms
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 4
Linné Centre
Gotland University
Tasks
Task 1 – Wake stability and interaction, NUM (Sasan), KTH
Task 2 – Wake stability and interaction, EXP (Ylva), KTH
Task 3 – Optimization (Søren), DTU
Task 4 – Farm control and optimization (Karl), HGO/KTH
Task 5 – ICEWIND (Görkem), HGO/KTH
Task 6 – FarmFarm (Ola), HGO/KTH
Task 7 – Farm control (Ingemar), Teknikgruppen
IEA Wind (31-WakeBench, 29-NextMex, 11-Genaral WE)
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 5
Linné Centre
Gotland University
• Background - Wake Activities
• Basic Wake Research
• Turbine Interaction-Farm optimization
• Farm-Farm Interaction
Outline
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 6
Linné Centre
Background on wakes
Stability analysis of the tip vortices of a wind turbine Wind Energy 13:8, 2010, Pages: 705-715
Analysis of numerically generated wake structures Wind Energy 12:1, 2009, Pages: 63-80
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 7
Linné Centre
Gotland University
Simulation Methods
● EllipSys3D
● Impossible to represent the flow structure locally around the blade and the wake at the same time
● ACD, ACL
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 8
Linné Centre
Gotland University
[Montgomerie, Dahlberg]
Wake structure
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 9
Linné Centre
Gotland University
Stability of the tip vorticies
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 10
Linné Centre
Gotland University
Instability mode: iso-contours of vorticity; 0.33Hz, 0.66Hz
Sasan Sarmast
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 11
Linné Centre
Gotland University
Pre-generated turbulent atmospheric boundary layer with ACD
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 12
Linné Centre
Gotland University
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 13
Linné Centre
Simulation of 9 turbines - with and without atmospheric turbulence
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 14
Linné Centre
Gotland University
Simulation of 9 turbines - with and without atmospheric turbulence
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 15
Linné Centre
Gotland University
• Background - Wake Activities
• Basic Wake Research
• Turbine Interaction-Farm optimization
• Farm-Farm Interaction
Outline
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 16
Linné Centre
Lillgrund Horns Rev
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 17
Linné Centre
Wind veer
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 18
Linné Centre
Wind veer
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 19
Linné Centre
Wind veer
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 20
Linné Centre
Simulations including wind veer
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 21
Linné Centre
Gotland University
Lillgrund
Sweden
Denmark
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 22
Linné Centre
Gotland University
Lillgrund (48 SWT-2.3 MW) 3.3 x D
4.3 x D
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 23
Linné Centre
Gotland University
Vakförluster i rad 1, 3 och 5 (3.3xD)
Row 1
Row 3
Row 5
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 24
Linné Centre
Gotland University
Wake Losses
0,0
0,2
0,4
0,6
0,8
1,0
1,2
Row_A Row_B Row_C Row_D Row_E Row_F Row_G Row_H
Row_number
Re
lative
po
wer
Row_1_WD_129,0
Row_3_WD_129,0
Row_5_WD_129,1
[Jan-Åke Dahlberg]
Row 1
Row 3
Row 5
Increased Production
Decreased Loads
CFD Simulation, Karl Nilsson
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 25
Linné Centre
Gotland University
• Background - Wake Activities
• Basic Wake Research
• Turbine Interaction-Farm optimization
• Farm-Farm Interaction
Outline
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 26
Linné Centre
Gotland University
Park-Park Interaktion
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 27
Linné Centre
Gotland University
Park vak bakom Horns rev
[Sten Frandsen, Kurt Hansen et.al., The making
of a 2nd generation wind farm model]
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 28
Linné Centre
Gotland University
Återhämtning efter Horns Rev
[Sten Frandsen, Kurt Hansen et.al., The making
of a 2nd generation wind farm model]
9th Deep Sea Offshore Wind R&D Seminar, January 19-20, 2012, Trondheim, Stefan Ivanell, 29