Flow Curvature Effect on Dynamic Behaviour of a Novel Vertical Axis Tidal Current Turbine: Numerical and Experimental Analysis

2005 ◽  
Author(s):  
Domenico Coiro ◽  
Fabrizio Nicolosi ◽  
Agostino De Marco ◽  
Stefano Melone ◽  
Francesco Montella
Keyword(s):  
Vertical Axis ◽  
Test Results ◽  
Vortex Model ◽  
Curvature Effects ◽  
Flow Curvature ◽  
Dynamic Performances ◽  
Tidal Current Turbine ◽  
Work Done ◽  
Current Turbine ◽  
Design Construction

This paper presents a summary of the work done by the authors regarding the design, construction and test of vertical axis hydro turbines to exploit tidal currents. Double Multiple Streamtube (DMS) model and Vortex model have been used to predict turbines performances either with fixed blades or with self-acting variable pitch blades. Within the DMS model, VAWT and VAWT_dyn codes have been developed to analyze steady and dynamic performances; within Vortex model, VAT-VOR3D code has been developed. Theoretical analysis and numerical predicted performances have been compared and validated with experimental test results on both model and real scale turbines. A comparison between DMS and Vortex model results has been presented. Moreover, the recent activities in terms of numerical investigations on the flow curvature effects are presented.

scholarly journals Dynamic Behaviour of the Patented Kobold Tidal Current Turbine: Numerical and Experimental Aspects

10.14311/718 ◽  
2005 ◽  
Vol 45 (3) ◽  
Author(s):  
D. P. Coiro ◽  
A. De Marco ◽  
F. Nicolosi ◽  
S. Melone ◽  
F. Montella
Keyword(s):  
Ad Hoc ◽  
Vertical Axis ◽  
Experimental Investigations ◽  
High Lift ◽  
Dynamic Performances ◽  
Computer Codes ◽  
Tidal Current Turbine ◽  
Messina Strait ◽  
Work Done ◽  
Current Turbine

This paper provides a summary of the work done at DPA on numerical and experimental investigations of a novel patented vertical axis and variable pitching blades hydro turbine designed to harness energy from marine tidal currents. Ponte di Archimede S.p.A. Company, located in Messina, Italy, owns the patented KOBOLD turbine that is moored in the Messina Strait, between the mainland and Sicily. The turbine has a rotor with a diameter of 6 meters, three vertical blades of 5 meters span with a 0.4 m chord ad hoc designed curved airfoil, producing high lift with no cavitation. The rated power is 160 kW with 3.5 m/s current speed, which means 25% global system efficiency. The VAWT and VAWT_DYN computer codes, based on Double Multiple Steamtube, have been developed to predict the steady and dynamic performances of a cycloturbine with fixed or self-acting variable pitch straight-blades. A theoretical analysis and a numerical prediction of the turbine performances as well as experimental test results on both a model and the real scale turbine will be presented and discussed. 

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.

Numerical study on energy-converging efficiency of the ducts of vertical axis tidal current turbine in restricted water

2020 ◽  
Vol 210 ◽  
pp. 107320 ◽  
Author(s):  
Wang Hua-Ming ◽  
Qu Xiao-Kun ◽  
Chen Lin ◽  
Tu Lu-Qiong ◽  
Wu Qiao-Rui
Keyword(s):  
Tidal Current ◽  
Numerical Study ◽  
Vertical Axis ◽  
Tidal Current Turbine ◽  
Current Turbine

Preliminary Results of a Vortex Method for Stand-Alone Vertical Axis Marine Current Turbine

2007 ◽  
Author(s):  
Ye Li ◽  
Sander M. Calisal
Keyword(s):  
Wind Turbine ◽  
Tidal Current ◽  
Vortex Method ◽  
Vertical Axis ◽  
Small Scale ◽  
Discrete Vortex ◽  
Analysis And Design ◽  
Tidal Turbine ◽  
Tidal Current Turbine ◽  
Current Turbine

Tidal power technology has been dwarfed once to take hold in the late 1970’s, because the early generations were expensive at small scale and some applications (such as barrages) had negative environmental impacts. In a similar working manner as a wind turbine, a tidal current turbine has been recognized as a promising ocean energy conversion device in the past two decades. However, the industrialization process is still slow. One of the important reasons is lack of comprehensive turbine hydrodynamics analysis which can not only predict turbine power but also assess impacts on the surrounding areas. Although a lot can be learned from the marine propeller or the wind turbine studies, a systematic hydrodynamics analysis on a vertical axis tidal current turbine has not been reported yet. In this paper, we employed vortex method to calculate the performance of stand-alone vertical axis tidal turbine in term of power efficiency, torque and forces. This method focuses on power prediction, hydrodynamics analysis and design, which can provide information for turbines distribution planning in a turbine farm and other related studies, which are presented in Li and Calisal (2007), a companion paper in the conference. In this method, discrete vortex method is the core for numerical calculation. Free vortex wake structure, nascent vortex and vortex decay mechanism are discussed in detail. Good agreements in turbine efficiency comparison are obtained with both the newly-designed tidal turbine test in a towing tank and early wind turbine test.

scholarly journals Theoretical vertical-axis tidal-current-turbine wake model using axial momentum theory with CFD corrections

2018 ◽  
Vol 79 ◽  
pp. 113-122 ◽  
Author(s):  
Yanbo Ma ◽  
Wei Haur Lam ◽  
Yonggang Cui ◽  
Tianming Zhang ◽  
Jinxin Jiang ◽  
...  
Keyword(s):  
Tidal Current ◽  
Vertical Axis ◽  
Momentum Theory ◽  
Tidal Current Turbine ◽  
Wake Model ◽  
Turbine Wake ◽  
Current Turbine

scholarly journals The influence of time step setting on the CFD simulation result of vertical axis tidal current turbine

2018 ◽  
Vol 12 (1) ◽  
pp. 3399-3409 ◽  
Author(s):  
Dendy Satrio ◽  
◽  
I Ketut Aria Pria Utama ◽  
Mukhtasor M ◽  
◽  
...  
Keyword(s):  
Tidal Current ◽  
Cfd Simulation ◽  
Vertical Axis ◽  
Time Step ◽  
Tidal Current Turbine ◽  
Current Turbine

Numerical and experimental study of the 3D effect on connecting arm of vertical axis tidal current turbine

2015 ◽  
Vol 30 (1) ◽  
pp. 83-96 ◽  
Author(s):  
Wei Guo ◽  
Hai-gui Kang ◽  
Bing Chen ◽  
Yu Xie ◽  
Yin Wang
Keyword(s):  
Experimental Study ◽  
Tidal Current ◽  
Vertical Axis ◽  
Tidal Current Turbine ◽  
3D Effect ◽  
Current Turbine
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