11 Oct 2021
11 Oct 2021
Status: a revised version of this preprint is currently under review for the journal WES.

CFD analysis of a Darrieus Vertical-Axis Wind turbine installation on the rooftop of a buildings under turbulent inflow conditions

Pradip Zamre and Thorsten Lutz Pradip Zamre and Thorsten Lutz
  • University of Stuttgart, Institute of Aerodynamics and Gas Dynamics, Pfaffenwaldring 21, D-70569 Stuttgart, Germany

Abstract. The behavior of a rooftop mounted generic H-rotor Darrieus vertical axis wind turbine (H-VAWT) is investigated numerically in realistic urban terrain. The interaction of the atmospheric boundary layer with the different buildings, topography, and vegetation present in the urban environment leads to the highly turbulent inflow conditions with continuously changing inclination, and direction. Consequently, all these factors can influence the performance of a VAWT significantly. In order to simulate a small H-VAWT at rooftop locations in the urban terrain under turbulent inflow conditions, a computational approach is developed. First, the flow field in the terrain is initialized and computed with inflow turbulence. Later, the wind turbine grids are superimposed for further computation in the turbulent flow field. The behavior of the H-VAWT is complex due to the 3D unsteady aerodynamics resulting from continuously changing the angle of attack, blade wake interaction, and dynamic stall. To get more insights into the behavior of a rooftop mounted H-VAWT in turbulent flow, high fidelity DDES simulations are performed at different rooftop positions and compared the results against the behavior at uniform inflow conditions in the absence of inflow turbulence, built environment. It is found that the performance of wind turbine is significantly increased near the rooftop positions. The skewed flow at the rooftop location increases the complexity. However, this effect contributes positively to increasing the performance of wind turbines.

Pradip Zamre and Thorsten Lutz

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on wes-2021-112', Gerard J.W. van Bussel, 16 Nov 2021
    • AC1: 'Reply to Reviewer 1', Pradip Zamre, 02 Feb 2022
  • RC2: 'Comment on wes-2021-112', Martin Hansen, 06 Dec 2021
    • AC2: 'Reply to Reviewer 2', Pradip Zamre, 02 Feb 2022

Pradip Zamre and Thorsten Lutz

Pradip Zamre and Thorsten Lutz


Total article views: 596 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
439 142 15 596 6 6
  • HTML: 439
  • PDF: 142
  • XML: 15
  • Total: 596
  • BibTeX: 6
  • EndNote: 6
Views and downloads (calculated since 11 Oct 2021)
Cumulative views and downloads (calculated since 11 Oct 2021)

Viewed (geographical distribution)

Total article views: 593 (including HTML, PDF, and XML) Thereof 593 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
Latest update: 16 May 2022
Short summary
To get more insights into the influence of the urban terrain flow on the performance of the rooftop mounted two-bladed Darrieus vertical axis wind turbine, scale resolving simulations are performed for a generic wind turbine in realistic terrain under turbulent conditions. It is found that the turbulence and skewed nature of the flow near rooftop locations has a positive impact on the performance of the wind turbine.