Print Email Facebook Twitter Multi-element ducts for ducted wind turbines Title Multi-element ducts for ducted wind turbines: A numerical study Author Dighe, V.V. (TU Delft Wind Energy) Avallone, F. (TU Delft Wind Energy) Igra, Ozer (Ben-Gurion University of the Negev) van Bussel, G.J.W. (TU Delft Wind Energy) Date 2019-08-13 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; the 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. 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 of taking this phenomenon into account. To reference this document use: http://resolver.tudelft.nl/uuid:4bdfef19-d0c2-48d9-bf6a-402d3833ce35 DOI https://doi.org/10.5194/wes-4-439-2019 ISSN 2366-7443 Source Wind Energy Science, 4 (3), 439-449 Part of collection Institutional Repository Document type journal article Rights © 2019 V.V. Dighe, F. Avallone, Ozer Igra, G.J.W. van Bussel Files PDF wes_4_439_2019.pdf 6.11 MB Close viewer /islandora/object/uuid:4bdfef19-d0c2-48d9-bf6a-402d3833ce35/datastream/OBJ/view