Abstract
Wind turbines without pitch control are more preferable from economical point of view but aerodynamic stall affects them more and after a critical wind speed local boundary layer separation occurs. Consequently, their power production is relatively low. In this study, air ducts added on the blade and using the airflow from them the kinetic energy of the low-momentum fluid behind the surface was increased and delay of separation of the boundary layer from the surface was examined The Response Surface Optimization method was utilized in order to get the best possible design under the constraints and targets arranged for the parameters termed the diameter, slope, number and angle of attack of the air ducts. By using computational fluid dynamics analysis, optimum parameter values were obtained and air-ducted and air-duct free blade designs were compared. An improvement in power coefficient between 3.4–4.4% depending on wind speed was achieved with the new design. Due to increase in viscous forces, more power from the rotor obtained by opening air ducts up to a critical number. However, the results showed that after the critical number of air duct addition of more duct on the blade reduced the power coefficient.
Highlights
Because of the limited amounts of fossil fuels and their negative impact on the environment, the search for renewable and clean energy sources, especially to generate electricity has been going on for a long time
7, the obtained power coefficient values depending on the angle of attack at different wind speeds obtained power coefficient values depending on the angle of attack at different wind speeds ranging ranging from m/s are to 8shown m/s are
To obtain maximum power from the air ducted blade (A-DB) design, the Response Surface Optimization method was used to determine the optimum values of parameters, such as duct diameter, slope, number and angle of attack of the blade
Summary
Because of the limited amounts of fossil fuels and their negative impact on the environment, the search for renewable and clean energy sources, especially to generate electricity has been going on for a long time. Wind turbines have negative effects on the environment, such as creating noise and visual pollution and causing birds to migrate and cause accidents when they are installed on their routes, since it uses a clean and renewable energy source, it does not cause the greenhouse effect. Using wind turbines instead of conventional fossil fuel turbines as an electricity generation method is extremely important in terms of preventing global warming and climate change. There are two types of wind turbines with horizontal and vertical axes, the horizontal axis wind turbines have been commercialized because they are relatively more efficient. The effective use of renewable resources is directly related to the improvement of financing opportunities, infrastructure, or legislation related to these energy sources and electricity generation and to the improvement of the efficiency of the processes in which electricity generation is carried out
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
