Journal cover Journal topic
Wind Energy Science The interactive open-access journal of the European Academy of Wind Energy
Journal topic
Discussion papers
https://doi.org/10.5194/wes-2019-21
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wes-2019-21
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research articles 13 May 2019

Research articles | 13 May 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Wind Energy Science (WES).

Multi-element ducts for ducted wind turbines: A numerical study

Vinit V. Dighe1, Francesco Avallone1, Ozer Igra2, and Gerard van Bussel1 Vinit V. Dighe et al.
  • 1Wind Energy Research Group, Faculty of Aerospace Engineering, TU Delft, Delft, the Netherlands
  • 2Department of Mechanical Engineering, Ben-Gurion University of Negev, Beersheva, Israel

Abstract. Multi-element ducts are used to improve the aerodynamic performance of ducted wind turbines (DWTs). Steady-state, two-dimensional computational fluid dynamics (CFD) simulations are performed for a multi-element duct geometry, consisting of a duct and a flap; goal is to evaluate the effects on the aerodynamic performance of the radial gap length and the deflection angle of the flap. Solutions from inviscid and viscous flow calculations are compared. It is found that increasing the radial gap length results in an augmentation of the total thrust generated by the DWT, whereas a larger deflection angle has an opposite effect. A reasonable to good agreement is seen between the inviscid and viscous flow calculations, except for multi-element duct configurations characterized by large flap deflection angles. The viscous effects become stronger at large flap deflection angles, and the inviscid calculations are incapable to take into account this phenomenon.

Vinit V. Dighe et al.
Interactive discussion
Status: final response (author comments only)
Status: final response (author comments only)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Vinit V. Dighe et al.
Vinit V. Dighe et al.
Viewed  
Total article views: 257 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
181 71 5 257 2 2
  • HTML: 181
  • PDF: 71
  • XML: 5
  • Total: 257
  • BibTeX: 2
  • EndNote: 2
Views and downloads (calculated since 13 May 2019)
Cumulative views and downloads (calculated since 13 May 2019)
Viewed (geographical distribution)  
Total article views: 127 (including HTML, PDF, and XML) Thereof 127 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited  
Saved  
No saved metrics found.
Discussed  
No discussed metrics found.
Latest update: 23 Jul 2019
Publications Copernicus
Download
Short summary
Multi-element ducts are investigated to further improve the aerodynamic performance of ducted wind turbines. CFD simulations are performed for a multi-element duct geometry, consisting of a duct and a flap; goal is to evaluate the effects on the aerodynamic performance of the radial gap length and the deflection angle of the flap. Increasing the radial gap length results in an augmentation of the total thrust generated by the DWT, whereas a larger deflection angle has an opposite effect.
Multi-element ducts are investigated to further improve the aerodynamic performance of ducted...
Citation