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On leading edge erosion at turbine blades due to heavy rain and the application oferosion safe mode control to extend life
Hasager Charlotte Bay Bech Jakob Ilsted Bak Christian
Publication date2019
Document VersionPublishers PDF also known as Version of record
Link back to DTU Orbit
Citation (APA)Hasager C B (Author) Bech J I (Author) amp Bak C (Author) (2019) On leading edge erosion at turbineblades due to heavy rain and the application of erosion safe mode control to extend life SoundVisualproduction (digital) DTU Wind Energy
DTU Wind Energy1 May 2019
On leading edge erosion at turbine blades due to heavy rain and the application of erosion safe mode control to extend life
Charlotte Hasager Jakob I Bech Christian Bak
DTU Wind Energy Risoslash Campus Roskilde Denmark
DTU Wind Energy1 May 2019
Motivation
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Unforeseen repair cost at several offshore wind farms motivated the research project
DTU Wind Energy1 May 2019
Working hypothesis
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DTU Wind Energy1 May 2019 5
DTU Wind Energy1 May 2019
Simulated power curves for the Vestas V52 for different leading edge roughness levels
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0
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3 5 7 9 11 13
Elec
trica
l pow
er [k
W]
Wind speed [ms]
Clean 20 of full LER 40 of full LER
60 of full LER 80 of full LER Full LER Bech et al 2018 WES
LER is leading edge roughness Roughness levels increase for eroded blade
DTU Wind Energy1 May 2019
Rain erosion test example
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Bech et al 2018 WES
DTU Wind Energy1 May 2019
Rain erosion test data plotted as a Woumlhler curve
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Bech et al 2018 WES
D is drop sizevt is blade speed
Impacts per unit area to failure as function of the kinetic energy for each impact
DTU Wind Energy1 May 2019
Woumlhler curves for droplet diameters of 15 20 and 25 mm
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RET is Rain Erosion Test
Bech et al 2018 WES