scholarly journals Experimental Validation and Numerical Simulation Evaluation of a Shrouded Tidal Current Turbine

2012 ◽  
Vol 16 (0) ◽  
pp. 25-32 ◽  
Author(s):  
Huihui Sun ◽  
Yusaku Kyozuka
Keyword(s):  
Numerical Simulation ◽  
Tidal Current ◽  
Experimental Validation ◽  
Simulation Evaluation ◽  
Tidal Current Turbine ◽  
Current Turbine

scholarly journals 3-D Simulation of Vertical-Axial Tidal Current Turbine

2016 ◽  
Vol 23 (4) ◽  
pp. 73-83 ◽  
Author(s):  
Zhang Zhiyang ◽  
Ma Yong ◽  
Jiang Jin ◽  
Liu Weixing ◽  
Ma Qingwei
Keyword(s):  
Numerical Simulation ◽  
Tidal Current ◽  
Simple Structure ◽  
Hydrodynamic Performance ◽  
Control Technique ◽  
Fluid Field ◽  
Improve Accuracy ◽  
Tidal Current Turbine ◽  
Current Turbine ◽  
Dynamics Method

Abstract Vertical-axial tidal current turbine is the key for the energy converter, which has the advantages of simple structure, adaptability to flow and uncomplex convection device. It has become the hot point for research and application recently. At present, the study on the hydrodynamic performance of vertical-axial tidal current turbine is almost on 2-D numerical simulation, without the consideration of 3-D effect. CFD (Computational Fluid Dynamics) method and blade optimal control technique are used to improve accuracy in the prediction of tidal current turbine hydrodynamic performance. Numerical simulation of vertical-axial tidal current turbine is validated. Fixed and variable deflection angle turbine are comparatively studied to analysis the influence of 3-D effect and the character of fluid field and pressure field. The method, put the plate on the end of blade, of reduce the energy loss caused by 3-D effect is proposed. The 3-D CFD numerical model of vertical-axial tidal current turbine hydrodynamic performance in this study may provide theoretical, methodical and technical reference for the optimal design of turbine.

scholarly journals Numerical simulation of foil with leading-edge tubercle for vertical-axis tidal-current turbine

2020 ◽  
Vol 14 (3) ◽  
pp. 6982-6992
Author(s):  
I Ketut Aria Pria Utama ◽  
Dendy Satrio ◽  
Mukhtasor Mukhtasor ◽  
Mehmet Atlar ◽  
Weichao Shi ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Tidal Current ◽  
Leading Edge ◽  
Vertical Axis ◽  
Simulation Method ◽  
Coefficient Of Performance ◽  
Simulation Results ◽  
Vertical Axis Turbine ◽  
Tidal Current Turbine ◽  
Current Turbine

The main disadvantage of the vertical-axis turbine is its low coefficient of performance. The purpose of this work was to propose a method to improve this performance by investigating the hydrodynamic forces and the flow-field of a foil that was modified with a sinusoidal leading-edge tubercle. NACA 63(4)021 was chosen as the original foil since it has a symmetrical profile that is suitable for use on a vertical-axis tidal-current turbine. The study was conducted using a numerical simulation method with ANSYS-CFX Computational Fluid Dynamics (CFD) code to solve the incompressible Reynolds-Averaged Navier-Stokes (RANS) equations. Firstly, the simulation results of the original foil were validated with available experimental data. Secondly, the modified foils, with three configurations of tubercles, were modelled. From the simulation results, the tubercle foils, when compared with the original foil, had similar lift performances at low Angles of Attack (0-8 degrees of AoA), lower lift performances at medium AoA (8-19 degrees) and higher lift performances at high AoA (19-32 degrees). A tubercle foil with Height/Chord (H/C) of 0.05 can maintain the static stall condition until 32 degrees. Therefore, a vertical-axis turbine with tubercle-blades provides an opportunity to increase its performance by extending the operational range for extracting energy in the dynamic stall condition.

Structural Dynamic Analysis of a Tidal Current Turbine Using MBDyn

2018 ◽  
Author(s):  
Jun Leng ◽  
Ye Li
Keyword(s):  
Tidal Current ◽  
Interaction Analysis ◽  
Vertical Axis ◽  
Internal Force ◽  
Mode Shapes ◽  
Structural Dynamic ◽  
Tidal Current Energy ◽  
Integrated Simulation ◽  
Tidal Current Turbine ◽  
Current Turbine

In recent years, tidal current energy has gained wide attention for its abundant resource and environmentally friendly production. This study focuses on analyzing dynamic behavior of a three-bladed vertical axis tidal current turbine. The multibody dynamics code MBDyn is used in the numerical simulation. It performs the integrated simulation and analysis of nonlinear mechanical, aeroelastic, hydraulic and control problems by numerical integration. In this study, tidal current turbine is idealized as an assembly of flexible beams including axis of rotation, arms and blades. We firstly conduct a modal analysis on the tidal current turbine and validate the model with the results obtained by ANSYS. The natural frequencies of blades with different size parameters are compared and the corresponding mode shapes are presented. Next, a parametric study was performed to investigate the effect of internal force on the dynamic response. It is concluded that the proposed method is accurate and efficient for structural analysis of tidal current turbine and this flexible multibody model can be used in the fluid-structure-interaction analysis in the future.

Experimental investigation of the wake of a horizontal axis tidal current turbine by LDV

2015 ◽  
pp. 601-612
Author(s):  
B Morandi ◽  
F Di Felice ◽  
M Costanzo ◽  
G Romano ◽  
D Dhomé ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Tidal Current ◽  
Horizontal Axis ◽  
Tidal Current Turbine ◽  
Current Turbine

scholarly journals Sustainable Power Generation by Tidal Current Turbine in Straits of Malacca

2018 ◽  
Vol 198 ◽  
pp. 04004
Author(s):  
P. T. Ghazvinei ◽  
H.H. Darvishi ◽  
A. Bhatia
Keyword(s):  
Tidal Current ◽  
Energy Resource ◽  
Flow Characteristics ◽  
Tidal Power ◽  
Tropical Country ◽  
Marine Current ◽  
Tidal Current Turbine ◽  
Straits Of Malacca ◽  
Sustainable Power ◽  
Current Turbine

Marine current power is a significant energy resource which is yet to be exploited for efficient energy production. Malaysia, being a tropical country is rich in renewable sources and tidal power is one of them. In Malaysia, Straits of Malacca is a potential site to establish a tidal current turbine. In the current study, the potential sites of the Straits of Malacca are discussed. A detailed review about the generator suitable for the Straits of Malacca with the associated challenges has also been discussed. Furthermore, the suitable solution for such challenges is proposed. The role of simulation in choosing an appropriate site and generator has also been reviewed. The focus of the study is to propose a generator suitable for the flow characteristics of the Straits of Malacca.

Prospective of development of large-scale tidal current turbine array: An example numerical investigation of Zhejiang, China

2020 ◽  
Vol 264 ◽  
pp. 114621 ◽  
Author(s):  
Guizhong Deng ◽  
Zhaoru Zhang ◽  
Ye Li ◽  
Hailong Liu ◽  
Wentao Xu ◽  
...  
Keyword(s):  
Numerical Investigation ◽  
Tidal Current ◽  
Large Scale ◽  
Tidal Current Turbine ◽  
Current Turbine
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