Experimental and Simulation Investigation of Performance of Scaled Model for a Rotor of a Savonius Wind Turbine

Abstract

Renewable energy sources are preferred for many power generation applications. Energy from the wind is one of the fastest-expanding kinds of sustainable energy, and it is essential in preventing potential energy issues in the foreseeable future. One pertinent issue is the many geometrical alterations that the scientific community has suggested to enhance rotor performance features. Hence, to address the challenge of developing a model that resolves these problems, the purpose of this investigation was to determine how well a scaled-down version of a Savonius turbine performed in terms of power output using a wind tunnel. Subsequently, the effect of the blockage ratio produced in the wind tunnel during the chamber test on the scaled model was evaluated. This study discusses the influences of various modified configurations on the turbine blades’ torque and power coefficients (Cp) at various tip speed ratios (TSRs) using three-dimensional (3D) unsteady computational fluid dynamics. The findings showed that the scaled model successfully achieved tunnel blockage corrections, and the experimental results obtained can be used in order to estimate how the same turbine would perform in real conditions. Furthermore, numerically, the new models achieved improvements in Cp of 19.5%, 16.8%, and 12.2%, respectively, for the flow-guiding channel (FGC at Ⴔ = 30°), wavy area at tip and end (WTE), and wavy area on the convex blade (WCB) models in comparison to the benchmark S-ORM model and under identical wind speed conditions. This investigation can provide guidance for improvements of the aerodynamic characteristics of Savonius wind turbines.

Enhancing the performance of Savonius rotor using tiered-height zigzag patterns in concave surface

“…In their study, Al-Gburi et al examined the characteristics of an elliptical blade profile with an inner wavy region, overlap ratio of 0.109, and a configuration consisting of two blades. The present investigation exhibited the maximum power coefficient [36]. Due to limited discussions on applying surface roughness, texture, or a wavy pattern to the semi-circular concave of the Savonius rotor for enhancing its performance, surface roughness emerges as a method that may be used to increase the drag force on the concave area.…”

“…The external devices were intended to boost power, static torque, and self-starting capabilities [31]. The Savonius turbine harnesses disparities in the drag forces generated by the convex and concave sides of its rotor blades during spinning around a vertical shaft [32] [33]. By improving the drag force on the concave surface and reducing the drag force on the convex surface, it is possible to increase the disparity in the total amount of drag force that is produced using this method.…”

Performance Rating and Flow Analysis of an Experimental Airborne Drag-Type VAWT Employing Rotating Mesh

“…Our findings, which demonstrate favorable performance compared to similar investigations on Savonius Drag-Type Vertical Wind Turbines, align well with the literature. Specifically, Gerrie et al [11] reported Cp values ranging from 0.12 to 0.14, Al-Gburi et al [15] reported a range from 0.10 to 0.21, Mohamed et al [21] reported a range from 0.10 to 0.25, Shukla et al [14] reported a range from 0.23 to 0.27, and Alom et al [41] reported a range from 0.11 to 0.33. However, it is crucial to acknowledge that each study involves a unique geometry, conditions, and experimental setups, which can influence the observed outcomes.…”

“…A number of other publications [12][13][14][15][16][17][18][19][20][21] have also focused on improving the performance of either Savonius, Daerius, or hybrid VAWTs using different approaches in design. However, it is important to note that while these turbines are practical for harnessing wind energy at low altitudes, the total energy produced is relatively low.…”

A Novel Hybrid MPPT Controller for PEMFC Fed High Step-Up Single Switch DC-DC Converter

“…In this wind network, the modern turbines with very low specifc ratings plus high hub heights increase the wind energy potential. As a result, the overall wind power system installation cost is reduced [3]. Here, the wind turbines capture the wind velocity for running the dual-fed induction machine.…”