2026· EPJ Web of Conferences· Vol 383, pp. 01003· 0 citations· 9 references
Abstract
The main objective of this study was to investigate the effect of flow contraction created by a duct on the power generation of a tidal turbine prototype. As a preliminary step in the development of a full-scale floating bridge-type ducted turbine, aimed at shallow near-shore locations subject to tidal currents with moderate energy densities, numerical simulations were carried out using computational fluid dynamics (CFD). These simulations were executed considering three cases: i) bare turbine (BT), ii) bare duct (BD) and iii) ducted turbine (DT). The steady-state RANS equations and the Shear Stress Transport turbulence model were chosen for all cases. The results for the bare turbine model (in terms of power, power coefficient, and pressure coefficient around the blades) correlate well with the available experimental data at tidal current speeds of 0.8-1.7 m/s. This correlation supports validating the reliability of the adopted numerical strategy. The results for the DT model suggest that adding a duct to the turbine under consideration (which was not originally designed/optimized to operate inside a duct) improves the system's power generation. In the present case, the power generation was increased by 38-53%.
Marine current turbines can provide predictable renewable power, but their performance at moderate current speeds depends strongly on the flow delivered to the rotor. This study numerically evaluates an open horizontal-axis marine current turbine and two flanged diffuser configurations with short and long expansion sec...
Najdan Waris C.P· International Journal of Res...· 0 citations
Tidal current energy is one of renewable ocean energies and the importance has been increasing recently. In this paper, a combination system of a bidirectional duct and a bidirectional turbine is examined by both an experiment and a Computational Fluid Dynamics (CFD). Before the experiment, in order to develop a design...
Y. Kinoue, W. Tsuru, T. Murakami et al.· Journal of Physics, Conferen...· 0 citations
The increasing demand for renewable energy has spurred the development of environmentally friendly technologies. Hydrokinetic turbines, which generate electricity from flowing water without dams or reservoirs, are a promising option. Among these, the Savonius turbine is ideal for low-flow conditions because of its simp...
P. Adiwibowo, T. Yuwono, W. A. Widodo et al.· E3S Web of Conferences· 0 citations
Decarbonization is one of the most pressing challenges facing the modern shipping industry. Wind-assisted ship propulsion (WASP) offers a promising pathway by integrating wind technologies with conventional systems, but understanding the hydrodynamic behaviour of such vessels under realistic conditions is essential...
Abdoul-Malik Bakari, Rui Lopes, A. Shiri et al.· Journal of Sailing Technolog...· 0 citations
This research is a numerical investigation into the two-dimensional configuration of a Savonius vertical axis wind turbine (VAWT) using computational fluid dynamics (CFD). Transient analysis has been performed on this turbine using rotatable domains in COMSOL Multiphysics to capture the unsteady aerodynamic characteris...
Baxtiyor Rustamov, Habibullo Goyibnazarov, Nodirabegim Rajabova et al.· EPJ Web of Conferences· 0 citations
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