Experimental evaluation of coaxial horizontal axis hydrokinetic composite turbine system

Abutunis, Abdulaziz; Taylor, Gregory; Fal, Mokhtar; Chandrashekhara, K.

doi:10.1016/j.renene.2020.05.010

Cited by 14 publications

(2 citation statements)

References 33 publications

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“…Table 1 shows that the Eppler hydrofoil family is of great research interest and that the Cp found varies between 0,27 and 0,42. This is supported by the results of this work, whose experimental finding coincides with Abutunis et al (2020), while the numerical one agrees with Aguilar et al (2021). Finally, it is highlighted that the numerical Cp between 0,33 and 0,51 are higher than the experimental ones between 0,27 and 0,45, this study being conclusive as to the cause of the difference.…”

Section: Resultssupporting

confidence: 87%

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Numerical and experimental performance analysis of a horizontal axis hydrokinetic turbine

Betancur Gómez,

Ardila Marín,

Chica Arrieta

2023

JART

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Alternative technologies such as hydrokinetic turbines can improve the electric energy conditions in rural or non interconnected areas with a low environmental impact. However, as they are an emergent device they must be studied further to better understand their phenomenology a nd the ways to improve their performance. The numerical and experimental evaluation of rotors under specific operation conditions depending on their hydrodynamic profiles result in efficiency curves for evaluated prototypes, so that devices are proposed which take full advantage of the flow conditions of a specific place. Considering the above, the main objective of this work was to numerically and experimentally evaluate a horizontal axis hydrokinetic turbine rotor prototype with an EPPLER E817 hydrodyna mic profile for a flow velocity of 1.4 m s 1 The simulations were carried out by means of computational fluid dynamics; the k ? SST turbulence model was used, and the torque was monitored. Then, the Grid Convergence Index ( was calculated to establish the results’ numerical uncertainty. For experimentation, the rotor was additively manufactured and tested in a test bench, where tests at velocity of nearly 1,4 m s 1 were performed and the braking voltage was varied to measure torque at different tip speed ratio (TSR Finally, the experimental and numerical curves of power coefficient ( versus TSR were compared Both the simulation and experimental results show th at a TSR of about 4 represents the best operating conditions, but, due to mechanical losses in the experimental setup, the reported Cp values differ between a numerical 0.4 34 and an experimental 0.2 67 The power generated by the evaluated rotor could achie ve 117.0 W, thus showing the potential of this technology for electrical power supply with low environmental impact.

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Section: Resultssupporting

confidence: 87%

“…1,2 5 0,51 (Gish et al, 2020) Exp NACA4412 0,91-1,52 0,265 4 0,33 (Abutunis et al, 2020) Exp Eppler 395 0,98 0,109 5 0,27 (Nachtane et al, 2020) Num NTS-XX20 2 -6,5 0,51 (Kirke, 2020 Thereupon, this article is structured as follows. The first section shows the way in which the CFD simulation was configured.…”

Section: Referencementioning

confidence: 99%