E3S Web Conf.
Volume 170, 20206th International Conference on Energy and City of the Future (EVF’2019)
|Number of page(s)||6|
|Section||Energy and Management|
|Published online||28 May 2020|
CFD based analysis of flow-driven vertical axis hydrokinetic turbines: blade hydrofoil and interactions effects
1 ECAM-EPMI Graduate School of Engineering, LR2E-Lab, 13 Boulevard de l’Hautil, 95092 Cergy-Pontoise ( France )
2 L2MGC-Lab - EA 4114.
3 Quartz-Lab - EA 7393,
* Corresponding author: firstname.lastname@example.org
In last years, interest in hydrokinetic energy conversion (HEC) technology has grown. However, HEC technology requires advancements to become successful for practical in-situ conditions. In this study we investigated the Darrieus type vertical axis hydrokinetic turbines (HKT). Simulations are carried out using commercial CFD package to study the hydrodynamic behavior of a three bladed turbine. Two HKT with same solidity equal to 0.17 were considered, a 1st with symmetric-NACA0018 blade hydrofoils and a 2nd with cambered-NACA4415 blades. Our simulations show a shift in instantaneous torque coefficients for two different tip-speed ratio (TSR) values. For TSR = 1, the 2nd HKT has a delay compared to the 1st HKT, while for TSR = 2 it has a lead. NACA0018 provides highest troque coefficients. For a hydrofarm use, it is important to consider the interactions between hydrokinetic turbines. We investigated the effect of streamwise distance on performance of a Darrieus turbine. A distance of about 11 times the diameter of HKT along the streamwise direction seems essential.
© The Authors, published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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