2025/04/11 by Farshad Rezaei, Marius Paraschivoiu
Engineering · Environmental Science · #Aerodynamics and Fluid Dynamics Research #Wind Energy Research and Development #Wind and Air Flow Studies
paper · doi:10.1139/tcsme-2024-0124
openalex publication_date 2025/04/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/26
The performance of a vertical axis wind turbine (VAWT) is investigated when placed at different positions on the roof, considering the building’s interaction with wind under various terrain categories and changes in the building’s shape. Computational fluid dynamics simulations are used to model a two-blade Darrieus-type VAWT. The results indicate that placing the VAWT at different positions on the roof leads to variations in the power coefficient ( C P ). The findings revealed that placing the VAWT in the middle of the roof edge led to 45.1% and 6.7% increase in the maximum C P compared to the isolated turbine in the uniform flow and positioning it at the front corner of the roof, respectively. By considering different velocity profiles associated with various terrain categories, it was found that terrain roughness plays a significant role in the power performance of roof-mounted VAWTs. The results show that maximum performance is achieved in low-roughness areas, such as coastal regions, while the maximum C P decreases in rougher terrains. Additionally, the results indicate that when the VAWT is placed on top of a dome, it generates 50.7% more power compared to when it is placed on top of a cubic building of the same height.