An analysis of the transient forces acting on Savonius rotors with different aspect ratios

Jaohindy, Placide; McTavish, Sean; Garde, François; Bastide, Alain

doi:10.1016/j.renene.2012.12.045

Cited by 69 publications

(24 citation statements)

References 18 publications

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“…During interaction of the water with the turbine blade, only one side of the blades develops the resultant force. CU turbine was specifically developed to reduce the backward drag force experienced by driven blade in Savonius rotor . The arms of the CU turbine was developed in order to accommodate the two rectangular plate.…”

Section: Configurations Of Cross‐flow Hydrokinetic Turbinesmentioning

confidence: 99%

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A review on technology, configurations, and performance of cross‐flow hydrokinetic turbines

Saini

2019

Int J Energy Res

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Summary Increased demand of energy leads to exploration of new sources of energy. In the last few years, hydrokinetic energy technology emerged as an important area in the field of renewable energy generation. Various hydrokinetic turbines have been studied and used to harness the hydrokinetic potential. Among all hydrokinetic turbine technology, cross‐flow hydrokinetic turbine is considered as the most suitable approach for the riverine system. There are various configurations of cross‐flow hydrokinetic turbine exist for hydrokinetic energy extraction. A number of numerical and experimental studies were carried out on the performance enhancement and design optimization of different configurations under variable operating conditions. Under the present paper, review of different rotor for the configurations of the cross‐flow hydrokinetic turbines are discussed. The paper will be useful to understand the cross‐flow hydrokinetic technology in order to explore the methods for selection, performance enhancement, and design optimization of cross‐flow hydrokinetic turbines.

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Section: Configurations Of Cross‐flow Hydrokinetic Turbinesmentioning

confidence: 99%

“…CU turbine was specifically developed to reduce the backward drag force experienced by driven blade in Savonius rotor. 79 The arms of the CU turbine was developed in order to accommodate the two rectangular plate. During rotation of the turbine, two plates act as the foot with minimum fluctuation in power and torque.…”

Section: Cu Turbine Rotormentioning

confidence: 99%

A review on technology, configurations, and performance of cross‐flow hydrokinetic turbines

Saini

2019

Int J Energy Res

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“…Although the measured velocity fields are similar to the results obtained using numerical simulation, it is difficult to capture a detached vortex structure through a numerical simulation. Jaohindy et al [4] and McTavish et al [5] showed the internal flow and performance data of a Savonius turbine through steady and unsteady numerical simulation. They pointed out that the shear stress transport (SST) k-v turbulence model was an effective approach to analyzing the turbine rotor.…”

Section: Introductionmentioning

confidence: 99%

Influence of the side-by-side arrangement on the performance of a small Savonius wind turbine

Jang

Lee

Kim

et al. 2016

Renew. Energy Environ. Sustain.

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Abstract. Scaled-down Savonius turbine rotors arrayed side-by-side are introduced to analyze the effects of design parameters on the performance between turbine rotors. Unsteady flow simulation and experimental measurement have been performed to compare turbine performance and validate the numerical simulation of the turbine rotor. Commercial code, SC/Tetra, which uses an unstructured grid system, has been used to solve the three-dimensional unsteady Reynolds-averaged Navier-Stokes equations. Single turbine rotors and two turbine rotors arrayed side-by-side were numerically analyzed. The distance between rotor tips is 0.5 times the rotor diameter. Throughout the numerical simulation, the power coefficient obtained by the time-averaged result of unsteady flow simulation was found to be in good agreement with the experimental result. A discussion on the design parameters using both a single and arrayed turbine rotors is presented based on the results of the unsteady flow simulation, including the flow field, power coefficient, velocity and vorticity contours.

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“…Nowadays, sliding mesh techniques are commonly used to compute non-axisymmetrical unsteady flow fields and corresponding aerodynamic performances of cross-flow fans [33,49] and wind turbines [18,20,21,23,26,19,22,1]. In particular, McNaughton et al [31] obtained a good agreement between coupled LES-sliding interfaces for thrust and power predictions of a tidal-stream turbine.…”

Section: Introductionmentioning

confidence: 99%

New high-resolution-preserving sliding mesh techniques for higher-order finite volume schemes

et al. 2015

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This paper presents a new sliding mesh technique for the computation of unsteady viscous flows in the presence of rotating bodies. The compressible Euler and incompressible Navier-Stokes equations are solved using a higher-order (>2) finite volume method on unstructured grids. A sliding mesh approach is employed at the interface between computational grids in relative motion. In order to prevent loss of accuracy, two distinct families of higher-order sliding mesh interfaces are developed. These approaches fit naturally in a high-order finite volume framework. To this end, Moving Least Squares (MLS) approximants are used for the transmission of the information from one grid to another. A particular attention is paid for the study of the accuracy and conservation properties of the numerical scheme for static and rotating grids. The capabilities of the present solver to compute complex unsteady vortical flow motions created by rotating geometries are illustrated on a cross-flow configuration.

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An analysis of the transient forces acting on Savonius rotors with different aspect ratios

Cited by 69 publications

References 18 publications

A review on technology, configurations, and performance of cross‐flow hydrokinetic turbines

A review on technology, configurations, and performance of cross‐flow hydrokinetic turbines

Influence of the side-by-side arrangement on the performance of a small Savonius wind turbine

New high-resolution-preserving sliding mesh techniques for higher-order finite volume schemes

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