Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
DIFFUSER STUDY FOR ENHANCING THE EFFICIENCY OF WIND TURBINES
Submission Author:
Ricardo Victal Moreira Leite , BA
Co-Authors:
Ricardo Victal Moreira Leite, Turan Oliveira, Alex Álisson Bandeira Santos, Luzia Aparecida Tofaneli
Presenter: Alex Álisson Bandeira Santos
doi://10.26678/ABCM.ENCIT2022.CIT22-0643
Abstract
The wind energy is becoming more relevant in the Brazilian energy matrix; however, the traditional geometry of wind turbines has a power coefficient limited to approximately 59.3 %. In spite of this, there are evidences that the use of a diffuser encapsulating the turbine allows to the surpassing of said limit by causing an acceleration profile, which actuates in the flow through the turbine. Therefore, it is relevant the use of Computational Fluid Dynamics, notorious tool for reducing research costs in this field, to study the impact of different geometry characteristic in said profile. In order to achieve this, it was studied the influence of the height of the flange and the diffuser angle in a flanged diffuser in order to determine the optimal characteristics for the increase in efficiency in the wind turbine. Thus, the more effective design was found to be the one with the height of the flange equal to 0.25 D and the with a 5° diffuser angle, in accordance to what was expected from literature.
Keywords
wind turbine, Aerodynamics, Diffusers, DAWT
