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Wind Energy Science The interactive open-access journal of the European Academy of Wind Energy
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https://doi.org/10.5194/wes-2019-62
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wes-2019-62
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

  05 Sep 2019

05 Sep 2019

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This preprint was under review for the journal WES. A revision for further review has not been submitted.

Ducted wind turbines in yawed flow: A numerical study

Vinit Dighe1, Dhruv Suri2, Francesco Avallone1, and Gerard van Bussel1 Vinit Dighe et al.
  • 1Wind Energy Research Group, Faculty of Aerospace Engineering, Technological University of Delft, Netherlands
  • 2Renewable Energy Research Group, Department of Aeronautical and Automobile Engineering, Manipal Institute of Technology, India

Abstract. Ducted Wind Turbines (DWTs) can be used for energy harvesting in urban areas where non-uniform flows are caused by the presence of buildings or other surface discontinuities. For this reason, the aerodynamic performance of DWTs in yawed flow conditions must be characterized. A numerical study to investigate the characteristics of flow around two DWT configurations using a simplified duct-actuator disc (AD) model is carried out. The analysis shows that the aerodynamic performance of a DWT in yawed flow is dependent on the mutual interaction between the duct and the rotor; an interaction that changes with duct geometry, AD loading and operating conditions. It is found that the duct cross-section camber not only offers insensitivity to yaw, but also a gain in performance up to a specific yaw angle; thereafter any further increase of yaw results in a performance drop.

Vinit Dighe et al.

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Status: closed (peer review stopped)
Status: closed (peer review stopped)
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Vinit Dighe et al.

Vinit Dighe et al.

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Short summary
Ducted Wind Turbines (DWTs) can be used for energy harvesting in urban areas where non-uniform flows are caused by the presence of buildings or other surface discontinuities. For this reason, the aerodynamic performance of DWTs in yawed flow conditions must be characterized. It is found that the duct cross-section camber not only offers insensitivity to yaw, but also a gain in performance up to a specific yaw angle; thereafter any further increase of yaw results in a performance drop.
Ducted Wind Turbines (DWTs) can be used for energy harvesting in urban areas where non-uniform...
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