Experimental and numerical study of a flapping-blade vertical-axis hydrokinetic turbine under free surface deformation and blockage effects

Moghimi, Mahdi; Derakhshan, Shahram

doi:10.1007/s13762-020-02642-y

Cited by 7 publications

(1 citation statement)

References 34 publications

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“…Traditionally, the blade of wind turbines and horizontalaxis hydrokinetic turbines is composed of twodimensional standard hydrofoil cross-sections; however, multi-element hydrofoil configurations or high-lift systems in the cross-section of turbine blades have been shown to improve the hydrodynamic characteristics of the blades, which can lead to an overall performance improvement of the turbines [6,10]. The multi-element configuration consists of several combinations of slats and flaps around a main hydrofoil [6 11].…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of high-lift hydrofoils with a flap used in the design of horizontal-axis hydrokinetic turbines

Rubio-Clemente¹,

Aguilar

Chica

2024

RE&PQJ

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The hydrodynamic performance and the flow field of two horizontal-axis hydrokinetic turbines with and without a high-lift hydrofoil with a flap were investigated using computational fluid dynamics (CFD) simulation. For improving the accuracy of the numerical simulation, the user-defined function (UDF) of 6-degrees of freedom (6-DoF) was used in the Ansys Fluent software. Unsteady Reynolds-averaged Navier–Stokes (URANS) equations coupled to the SST 𝑘 − 𝜔 turbulence model were employed during the simulation. A three-dimensional model of both of the turbines with three blades was conducted for obtaining the performance curve of the power coefficient (𝐶𝑃) versus the tip speed ratio (TSR). The maximum power coefficients (𝐶𝑃𝑀𝑎𝑥) of the hydrokinetic turbines with and without a high-lift hydrofoil arrangement were 0.5050 and 0.419, respectively. Experimental data from the literature were used for the validation of the numerical results, specifically for the case when a rotor with traditional blades is utilized. In general, the simulation results were in good agreement with the experimental data.

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Section: Introductionmentioning

confidence: 99%