Wind Tunnel Test of Counter-Rotating Dual Rotor Wind Turbine with Double Rotational Armature Design
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Abstract
This study evaluates the performance of a Counter-Rotating Dual Rotor Wind Turbine (CR-DRWT) equipped with a double rotational armature, aimed at enhancing energy capture and efficiency in small-scale wind turbine (SWT) applications. Through wind tunnel testing, the CR-DRWT confirmed earlier findings in literature and achieved a 15 to 50% increase in power output and a 10% increase in efficiency (CP) compared to a single rotor configuration at higher wind speeds (> 7 m/s). Though these gains were not observed at lower wind speeds (4-7m/s). The simplified mechanics of a double rotational armature demonstrated promise for application in SWT’s. The design’s maximum CP values were below those achieved in previous field tests at larger scale highlighting potential for improvement for smaller sized turbines. To further explore the aerodynamics of CR-DRWT’s, computational fluid dynamics (CFD) simulations are recommended, as they could provide insights into optimizing flow dynamics around both rotors. Finally, the study emphasizes the need for precise pitch angle and rotational speed measurements to improve the value of future measurements.
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Abstract
This study evaluates the performance of a Counter-Rotating Dual Rotor Wind Turbine (CR-DRWT) equipped with a double rotational armature, aimed at enhancing energy capture and efficiency in small-scale wind turbine (SWT) applications. Through wind tunnel testing, the CR-DRWT confirmed earlier findings in literature and achieved a 15 to 50% increase in power output and a 10% increase in efficiency (CP) compared to a single rotor configuration at higher wind speeds (> 7 m/s). Though these gains were not observed at lower wind speeds (4-7m/s). The simplified mechanics of a double rotational armature demonstrated promise for application in SWT’s. The design’s maximum CP values were below those achieved in previous field tests at larger scale highlighting potential for improvement for smaller sized turbines. To further explore the aerodynamics of CR-DRWT’s, computational fluid dynamics (CFD) simulations are recommended, as they could provide insights into optimizing flow dynamics around both rotors. Finally, the study emphasizes the need for precise pitch angle and rotational speed measurements to improve the value of future measurements.
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Wind Energy
Version of Record25 Jun 2025Published
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Niels (N.C.) Adema, Wouter (W.F.J.) Swart Ranshuysen, Arjen (A.) de Ruijter, et al.
Wind Tunnel Test of Counter-Rotating Dual Rotor Wind Turbine with Double Rotational Armature Design. Authorea. 10 January 2025.
DOI: https://doi.org/10.22541/au.173652486.67936709/v1
DOI: https://doi.org/10.22541/au.173652486.67936709/v1
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