Casing optimization of a Savonius wind turbine

Antar, Elie; Elkhoury, M.

doi:10.1016/j.egyr.2019.08.040

Cited by 18 publications

(4 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It confirmed that the overset mesh prediction was of the same quality as the sliding mesh approach typically used in Savonius turbine simulations. The obtained C p values were about 20% higher than usually reported for such turbines [4,25], but were in the range of values obtained when 2D simplification was applied [26,27], where the influence of endplates is omitted. Introduction of the blade deformation with 10% eccentricity provided the torque and power coefficients C t = 0.487 and C p = 0.389.…”

Section: Resultscontrasting

confidence: 50%

Archives of Thermodynamics

Marchewka,

Sobczak,

Reorowicz

et al. 2021

View full text Add to dashboard Cite

Machines utilising renewable energy constantly undergo research aimed at raising their efficiency. One of them is a Savonius wind turbine, where scientists propose adjustments to improve its aerodynamic properties. At present, their assessment is usually performed by means of transient computational fluid dynamics simulations with two-or threedimensional models. In this paper, the overset (chimera) mesh approach was applied to investigate the performance of a Savonius wind turbine equipped with deformable blades. They were continuously deformed during rotation by a dedicated mechanism to increase a positive torque of the advancing blade, and meanwhile, decrease a negative torque of the returning blade. A quasi-two-dimensional model with a two-way fluid-structure interaction method was applied, where the structural solver determined blade deflection caused by the predefined deformation mechanism and aerodynamic loads, whereas the coupled computational fluid dynamics solver determined the transient flow. The deformable blades rotor performance was calculated and compared with a conventional rigid Savonius turbine, both simulated using the overset mesh approach. The average value of the power coefficient achieved a 55% rise in the case of deformable blades turbine. Additionally, to validate the overset method, its results were compared with the classical sliding mesh method for a conventional rigid rotor.

show abstract

Section: Resultscontrasting

confidence: 50%

Archives of Thermodynamics

Marchewka,

Sobczak,

Reorowicz

et al. 2021

View full text Add to dashboard Cite

show abstract

“…According to the above description, additional studies and testing in the hopes of boosting the performance of the Savonius turbine in the combination of the concave and convex side models is required with a basic and low-cost wind energy conversion device. The enhancement of Savonius turbine performance as an alternative energy source [32][33][34][35][36] , such as water pumping and irrigation in Indonesia farms, is one possibility.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Simulation Investigation on Savonius Turbine: Influence of Inlet-Outlet Ratio Using a Modified Blade Shaped to Improve Performance

Herlambang¹,

Supriyo²,

Prasetiyo³

et al. 2022

Evergreen

View full text Add to dashboard Cite

This study aims to obtain the characteristics of the Savonius turbine based on the ratio of the inlet and outlet blades by using a modified blade shape and analyzing numerical simulations of the speed and pressure around the turbine blades. The use of Savonius turbines can be a solution because it produces large torque even if installed at low wind speed. Savonius blade modification into a double blade with a combination of type L and U aims to capture greater wind energy while generating greater electrical power. The study was tested at speeds of 3, 5, 7, and 9 m/s with variable differences in the side in and out of the turbine. However, what is presented in this article is the test parameters at a wind speed of 7 m/s. The test obtained data in the form of torque, generator speed, voltage, and current produced by the turbine. Once analyzed it can be concluded that the best performance is produced by a single blade rotor, then the rotor is 1:1, 2:1, and the lowest performance is obtained from the 3:1 rotor. The results of the study indicate that the Savonius turbine has optimum performance on a single blade rotor model at 189 rpm, the power coefficient value is 0.039, turbine power is 80.26 W, generator power is 3.08, and system efficiency is 3.84%.

show abstract

“…Energies 2021, 14,1962 2 of 23 All these advantages encourage studies aimed at constructive and functional optimization that can ensure increased operation performance for this rotor type. To achieve this goal, multiple studies and research activities have been conducted in which researchers used both numerical [15][16][17][18][19][20][21][22][23] and experimental methods [24][25][26][27][28][29][30][31][32][33][34][35] to establish and improve the performance of rotor construction variants directed towards blade shape optimization or determination of the optimal rotor blade number [36][37][38][39]. Additionally, the studies aimed to establish the optimum values related to the aspect ratio [40][41][42][43], and the overlap ratio [44][45][46][47][48][49], and to change the performance parameters in the case of end plates [50], and curtains mounted to the rotor assembly [51][52][53][54][55], with the scope of directing the air stream to the active blade, thereby avoiding the negative mom...…”

Section: Introductionmentioning

confidence: 99%

Review of Specific Performance Parameters of Vertical Wind Turbine Rotors Based on the SAVONIUS Type

2021

View full text Add to dashboard Cite

Increasing energy demand and environmental regulations around the world provide an adequate framework for developing methods of obtaining energy from renewable sources. Wind force is a resource with a high potential through which green energy can be obtained with no negative impact on the environment. Different turbine typologies have been developed, which can convert the wind force into mechanical and electrical energy through turbine rotational motion. Starting from the classic vertical-axis SAVONIUS rotor model, other models have been designed, which, according to the numerical studies and experimental test results, show higher performance parameters in operation. Such models present specific rotor blade geometries to achieve better operational results in terms of shaft torque and generated power. There are multiple research results from numerical analysis on virtual models or experimental tests that use rotor models in different constructive configurations aiming to improve operation performance. These research activities are related to the rotor blade number, the aspect and overlap ratio values, the blade profile geometry modification, the use of end plates connected to the rotor blades, curtain mounting solutions for directing the air flow on the active blade alone, and rotor constructive variants with deformable blades during operation. Some of the results obtained from the mentioned research activities are shown in this review for special rotor configurations whose performance results in terms of torque or power values are compared to the classical SAVONIUS model.

show abstract

Casing optimization of a Savonius wind turbine

Cited by 18 publications

References 9 publications

Archives of Thermodynamics

Archives of Thermodynamics

Experimental and Simulation Investigation on Savonius Turbine: Influence of Inlet-Outlet Ratio Using a Modified Blade Shaped to Improve Performance

Review of Specific Performance Parameters of Vertical Wind Turbine Rotors Based on the SAVONIUS Type

Contact Info

Product

Resources

About