Study of direct force measurement and characteristics on blades of Savonius rotor at static state

Irabu, Kunio; Roy, Jitendro Nath

doi:10.1016/j.expthermflusci.2010.12.015

Cited by 38 publications

(26 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This power coefficient is significantly lower than most lift-type wind turbines, such as HAWTs and Darrieus [6] wind turbines. To increase the efficiency of Savonius turbines comprehensive studies have been conducted to quantify the effects of various design parameters, such as rotor aspect ratio, overlap, number of blades, and endplates, on performance using both experimental and numerical methods [5,[7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics Prediction of a Modified Savonius Wind Turbine with Novel Blade Shapes

et al. 2015

View full text Add to dashboard Cite

Abstract:The Savonius wind turbine is a type of vertical axis wind turbine (VAWTs) that is simply composed of two or three arc-type blades which can generate power even under poor wind conditions. A modified Savonius wind turbine with novel blade shapes is introduced with the aim of increasing the power coefficient of the turbine. The effect of blade fullness, which is a main shape parameter of the blade, on the power production of a two-bladed Savonius wind turbine is investigated using transient computational fluid dynamics (CFD). Simulations are based on the Reynolds Averaged Navier-Stokes (RANS) equations with a renormalization group turbulent model. This numerical method is validated with existing experimental data and then utilized to quantify the performance of design variants. Results quantify the relationship between blade fullness and turbine performance with a blade fullness of 1 resulting in the highest coefficient of power, 0.2573. This power coefficient is 10.98% higher than a conventional Savonius turbine.

show abstract

Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics Prediction of a Modified Savonius Wind Turbine with Novel Blade Shapes

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Savonius turbine has been studied experimentally and numerically to examine the effects of various design parameters such as the rotor aspect ratio, the overlap, the number of buckets, the rotor endplates, and the influence of bucket stacking (Saha et al, 2008;Irabu and Roy, 2011;Akwa et al, 2012). In addition, many researchers have worked to improve the efficiency and the starting torque characteristics of the Savonius rotor.…”

Section: Introductionmentioning

confidence: 99%

Conceptual design and numerical simulations of a vertical axis water turbine used for underwater mooring platforms

Tian

Song

Mao

2013

International Journal of Naval Architecture and Ocean Engineeri

View full text Add to dashboard Cite

Energy is a direct restriction to the working life of an underwater mooring platform (UMP). In this paper, a vertical axis water turbine (VAWT) is designed to supply energy for UMPs. The VAWT has several controlled blades, which can be opened or closed by inside plunger pumps. Two-dimensional transient numerical studies are presented to determine the operating performance and power output of the turbine under low ocean current velocity. A standard k-ε turbulence model is used to perform the transient simulations. The influence of structural parameters, including foil section profile, foil chord length and rotor diameter, on the turbine performance are investigated over a range of tipspeed-ratios ( TSRs ). It was found that turbine with three unit length NACA0015 foils generated a maximum averaged coefficient of power, 0.1, at TSR = 2.

show abstract

“…Later studies [4][5][6][7] were developed using wind tunnels to simulate different operation conditions and to obtain the efficiency profile of Savonious turbine with different configurations. Afterward, the studies focused in finding new propeller profiles, which improved the efficiency [8][9][10][11][12][13], using the power generated by the turbine. Obstacles were also proposed to decrease the negative torque produced during the operation.…”

Section: Introductionmentioning

confidence: 99%

Computational model of Savonius turbine

Díaz

Pajaro

Salas

2015

Ingeniare. Rev. chil. ing.

View full text Add to dashboard Cite

Although vertical axis turbines have long existed, it was not until the beginning of the twentieth century when the Darrieus (1921) and Savonius rotors (1924) appeared; the two most used models nowadays. Savonius rotor was invented by the Finnish engineer Sigurd J Savonius with two half cylinders basic design that rotate around an axis. In this research, four different models of Savonius rotor blades are analyzed, as well as the traditional rotor. The principal aim of this research is to find the best Power Coefficient (Cp) and the best torque coefficient (Cm) for different models. In order to achieve the objective, a CFD computational model was used, with 3D simulations in transient regime. A computational domain was defined as a function of the minimal longitude in the system, and meshing is performed after a mesh size independency analysis. The results show that helical Savonius rotor performs the best in the analyzed operation conditions and improves in ~20% above the other configurations. In addition, 3-blade rotor presents the lowest performance of all the models with a power coefficient Cp of 0.073.

show abstract

Study of direct force measurement and characteristics on blades of Savonius rotor at static state

Cited by 38 publications

References 6 publications

Computational Fluid Dynamics Prediction of a Modified Savonius Wind Turbine with Novel Blade Shapes

Computational Fluid Dynamics Prediction of a Modified Savonius Wind Turbine with Novel Blade Shapes

Conceptual design and numerical simulations of a vertical axis water turbine used for underwater mooring platforms

Computational model of Savonius turbine

Contact Info

Product

Resources

About