On design and performance prediction of the horizontal-axis water turbine

Wu, Hsing-nan; Chen, Long-jeng; Yu, Ming-Huei; Li, Wenyi; Chen, Bang-Fuh

doi:10.1016/j.oceaneng.2012.04.003

Cited by 35 publications

(18 citation statements)

References 4 publications

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“…In order to analyze the numerical performance of the turbine, the following non-dimensional parameters have to be defined: tip speed ratio λ which is defined by equation (1) and represents the non-dimensional angular velocity.…”

Section: Resultsmentioning

confidence: 99%

“…Computational Fluid Dynamics (CFD) has proven to be a useful tool for flow analysis around this type of turbines. For example regarding performance prediction of horizontal axis water turbines, Wu et al [1] shows numerical results for the power coefficient (C p ) using CFD that are in satisfactory agreement with experimental data. In the present study, the software ANSYS -Fluent has been employed to perform the numerical simulation of the horizontal axis hydrokinetic turbine (HAHT).…”

Section: Introductionmentioning

confidence: 81%

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CFD Simulation of a Horizontal Axis Hydrokinetic Turbine

Castrillón¹,

Laı́n²,

Contreras³

2017

REPQJ

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Abstract. This study presents three-dimensional full transient numerical simulations of a horizontal axis hydrokinetic turbine, HAHT with particular emphasis on the analysis of its hydrodynamic characteristics. Hydrokinetic turbine performance is studied using a time-accurate Reynolds-averaged NavierStokes (RANS) commercial solver. A physical transient rotorstator model with a sliding mesh technique is used to capture changes in flow field at a particular time step. A shear stress transport (SST) turbulence model has been employed to model the turbulent features of the flow. The studied rotor has three blades, based on NACA4412 airfoil. Two operation conditions have been considered: shaft parallel to the incoming flow (SP configuration) and shaft inclined an angle  around 30 o regarding the main stream (SI configuration). As a result, the decrement of the hydrodynamic performance of the turbine with the inclined axis is quantitatively evaluated regarding that of the parallel axis. Moreover, a preliminary study of the vorticity dynamics in the wake of the inclined rotor is performed

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 81%

CFD Simulation of a Horizontal Axis Hydrokinetic Turbine

Castrillón¹,

Laı́n²,

Contreras³

2017

REPQJ

View full text Add to dashboard Cite

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“…For that purpose, the experimental measurements reported in Reference [34] have been considered. Such experiments have been employed by several authors to validate different types of numerical computations, from BEM to CFD [11,34]; therefore, they constitute an appropriate source for validating the CFD computations. In the experiments of Reference [34], the model turbine rotor is placed perpendicularly to the main flow direction, so its inclination angle γ is zero; the rotor diameter was 800 mm with blades based on the profile NACA 63-8XX.…”

Section: Comparison Of Cfd Simulations With Other Sourcesmentioning

confidence: 99%

“…The authors carried out an experimental analysis used to validate the CFD results; they found that the refined grid presented a discrepancy at the power coefficient less than 5%, which is considered quite satisfactory taking into account that measurements were carried out for the complete turbine geometry including an ambient turbulence in the site. In Reference [11], the authors wanted to identify the main design parameters affecting the performance of a Horizontal Axis Water Turbine by presenting numerical results in comparison with experimental measurements. In such work, it was demonstrated that, when the other parameters were kept constant, the numerical output power of the turbine was roughly proportional to the square of the blade span and to the cube of the incoming velocity.…”

Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics Modelling and Simulation of an Inclined Horizontal Axis Hydrokinetic Turbine

2018

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In this contribution, unsteady three-dimensional numerical simulations of the water flow through a horizontal axis hydrokinetic turbine (HAHT) of the Garman type are performed. This study was conducted in order to estimate the influence of turbine inclination with respect to the incoming flow on turbine performance and forces acting on the rotor, which is studied using a time-accurate Reynolds-averaged Navier-Stokes (RANS) commercial solver. Changes of the flow in time are described by a physical transient model based on two domains, one rotating and the other stationary, combined with a sliding mesh technique. Flow turbulence is described by the well-established Shear Stress Transport (SST) model using its standard and transitional versions. Three inclined operation conditions have been analyzed for the turbine regarding the main stream: 0° (SP configuration, shaft parallel to incoming velocity), 15° (SI15 configuration), and 30° (SI30 configuration). It was found that the hydrodynamic efficiency of the turbine decreases with increasing inclination angles. Besides, it was obtained that in the inclined configurations, the thrust and drag forces acting on rotor were lower than in the SP configuration, although in the former cases, blades experience alternating loads that may induce failure due to fatigue in the long term. Moreover, if the boundary layer transitional effects are included in the computations, a slight increase in the power coefficient is computed for all inclination configurations.

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“…The first developed models used the Horizontal Axis Water Turbine (HAWT), which are analogous to wind rotors. An example is the Kepler Energy System [3] of 60 m of length and installed at a depth of 20 m in Bristol (United Kingdom). Unfortunately, these systems are very expensive because of its big dimensions and the necessity of being anchored at great depths.…”

Section: Technologiesmentioning

confidence: 99%

Harnessing the Energy of Tidal Currents: State-of-the-Art and Proposal of Use in EV Charging Points

Fernández-Jiménez¹,

Cruz²,

Ruiz-Torres³

et al. 2018

The 2nd International Research Conference on Sustainable Energy, Engineering, Materials and Environment

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The implantation of floating platforms for the generation of electricity from tidal currents is possible due to the development of new hydrokinetic microturbines. This article presents an analysis of the situation in which the exploitation of tidal currents is nowadays, the state of art of the existing technologies and the principal projects that are currently underway. In addition, it focuses on the different aspects and criteria to consider for building one of these plants. Finally, an installation by floating platform is proposed to supply electricity to a charging station for electric vehicles near the Nalon river (Spain) with a description of it and an analysis of feasibility.

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On design and performance prediction of the horizontal-axis water turbine

Cited by 35 publications

References 4 publications

CFD Simulation of a Horizontal Axis Hydrokinetic Turbine

CFD Simulation of a Horizontal Axis Hydrokinetic Turbine

Computational Fluid Dynamics Modelling and Simulation of an Inclined Horizontal Axis Hydrokinetic Turbine

Harnessing the Energy of Tidal Currents: State-of-the-Art and Proposal of Use in EV Charging Points

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