The Front Cover
Lightning damage stubbornly remains a major O&M expense for owner-operators in cost and frequency. Damage such as blade skin punctures, shell delamination, split trailing edges, and (less frequently) catastrophic damage to wind turbine blades is costly to repair and causes undesirable downtime. Arctura has developed a wind turbine blade coating that reduces lightning damage to turbine blades by encouraging surface flashovers (see page 7). (cover image: courtesy NTS Lightning Technologies).
Publisher's Note
HUSUM Wind 2021: first European on-site trade fair since the pandemic began
Features
Wind Turbines and Computational Fluid Dynamics
By Jacob Krispin and Joel Balbien, Vorcat, USA
Future Super Large Rotor Blades
By Frank Seewald, Torsten Sadowski, Roland Stoer, WINDnovation Engineering Solutions, Germany
Moving Rotor Hubs
By Sabrina Deininger
Windtech Future
Are We Going in the Right Direction?
By Ahmad Hemami, McGill University, Montreal, Canada
View from Inside
Together We Must Act Faster!
By Stefan Gsänger, Secretary General, World Wind Energy Association
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