Effect of Blade Angle on Aerodynamic Performance of Archimedes Spiral Wind Turbine

Abstract

Energy harvesting from wind in urban areas is an important solution to meet energy needs and environmental care. This study describes the effect of blade angle on the aerodynamic performance of small-scale Archimedes spiral-wind-turbine blades by computational simulation, which is experimentally validated. Archimedes wind turbine is classified as one of the HAWTs. The computational approach was used to predict the aerodynamic performance of the scaled-down rotor blades. Blade angle is defined by the angle between the rotational axis and the tip of the blade, which varied from 50° to 65° with an interval of 5°. The computational study was carried out using the ANSYS CFX 19 software for a steady incompressible flow. The performance parameters of the wind turbine, which are power and torque coefficients were explored for different blade angles. This was carried out for wind speed from 5 to 12 m/s with an interval of 1 m/s. In order to validate the results of the computational simulation, an experimental study was carried out using a scaled-down 3D-printed models. The experimental study concentrated on the effect of blade angle on the rotating speed for the different turbine models. Obviously, the results highlight that the maximum power coefficient has an inverse relation to the blade angle.

Performance of an Archimedes screw turbine with spiral configuration for hydrokinetic applications

“…On the other hand, the ASHT achieved a Cp of 0.5515 at a TSR equal to 1.35 [5]. The maximum Cp is slightly higher than those with similar AST presented in the literature for wind applications [15,16,17,24,25,26]. It is evident that the Cp of the AST is lower than that of the ASHT.…”

“…For example, the behavior of the turbine has been compared for several blade inclination angles (γ) with respect to the axial axis. γ was fixed at several values, such as 50°, 55°, 60° and 65° [15]. In this case, the higher Cp was equal to 0.22 at a TSR of 1.71 with a γ of 50°.…”

“…Finally, it was obtained that the maximum Cp (0.226) for the variable angle rotor was produced at a TSR equal to 1.96; while the maximum Cp reached for the turbine with a fixed angle equal to 0.207 occurs at a TSR of 1.57, resulting in a difference of only 9.18% compared to the maximum Cp of the turbine with a variable angle. Additionally, the referred authors indicated that the first and third blades of the turbine develop a key role in the extraction of energy, which in this case is wind energy [15].…”

Impact of Different Blade Counts on In-Pipe Drag-Type Water Turbines

“…The key problem with in-pipe turbines is determining the appropriate design to maximize their efficiency. The performance of water turbines is studied by some researchers using computational fluid dynamics (CFD) while others also run experiments to learn more about the technology and mechanism of the system [3][4][5][6].…”

Enhancing Performance Evaluation of Archimedes Screw Turbines under Optimal Conditions: A Focus on Flow Rate Analysis, Empirical Equations, and Comparative Scaling Methods

“…By validating the experimental results and numerical simulations, they predicted the performance of the turbine to achieve high efficiency. In 2019, Maulana et al [17] experimentally studied an AST and found that the turbine efficiency has a nonlinear trend with increasing flow rate, and the maximum efficiency of the turbine occurs at an intermediate flow rate. In 2021, Bustomi et al [18] conducted an experimental investigation of a inclined axis turbine.…”