Wind turbine blades are now slender and flexible, presenting large deformations even at service load levels . Finite element geometrically nonlinear structural analysis has thus become a rule in HAWT blade design routines .
These differences are small, but generally speaking, the more blades you have, the more stable your wind turbine is. On the other hand, a turbine with fewer blades will be more efficient when it comes to actually generating power. Again, at the scale we're talking about, these are not make-or-break variations.
As for the five-blade rotor, the turbine power obtained is (955W). It is also found that the design of a small horizontal wind turbine with five blades is more efficient than a turbine with three blades, suitable for working in areas with low wind speed and is of high efficiency compared to the size of the turbine.
The present work aims to explore the limits of conventional numerical methodologies for blade design, specifically applied to an offshore-sized, slender wind turbine blade. To the authors' knowledge, no previous studies have conducted a detailed structural comparison between beam and shell models for such a long and slender blade.
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It is found that the best performance is gained when a three-bladed turbine rotor can work with a turbine power of 582W. As for the five-blade rotor, the turbine power obtained is (955W).
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