Wind Energy Science
Wind Energy Science
WES
Articles | Volume 11, issue 6
Articles | Volume 11, issue 6
https://doi.org/10.5194/wes-11-2037-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wes-11-2037-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 11, issue 6
Research article
 | 
10 Jun 2026
Research article |  | 10 Jun 2026

Experimental validation and extension of a blade element momentum model for counter-rotation dual-rotor wind turbine with double rotational armature design

Niels Cornelis Adema, Josep Gil-Vernet Pagonabarraga, Wouter Swart Ranshuysen, Arjen de Ruijter, and Gerard Schepers

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Short summary
Small wind turbines could help to generate renewable energy but are often inefficient and expensive. This study tested a counter-rotating dual-rotor design with both rotors connected through one generator, eliminating gearboxes. Wind tunnel tests achieved a 1 kW output with 33 % efficiency. A computational model showed that the turbine could theoretically reach 56 % efficiency with optimized blade angles. This compact design reduces mechanical complexity and suits urban applications.
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