On the Performance of Small-Scale Horizontal Axis Tidal Current Turbines. Part 1: One Single Turbine
| Autor: | R. Alipour, Roozbeh Alipour, Seyed Alireza Ghazanfari, Seyed Saeid Rahimian Koloor, Michal Petrů |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Airfoil
Maximum power principle 020209 energy Blade element momentum theory lcsh:TJ807-830 Geography Planning and Development lcsh:Renewable energy sources 02 engineering and technology Management Monitoring Policy and Law 01 natural sciences Turbine 010305 fluids & plasmas Physics::Fluid Dynamics 0103 physical sciences 0202 electrical engineering electronic engineering information engineering lcsh:Environmental sciences horizontal axis tidal current turbine lcsh:GE1-350 Tip-speed ratio Renewable Energy Sustainability and the Environment business.industry Turbulence lcsh:Environmental effects of industries and plants power coefficient Mechanics tidal energy TSR lcsh:TD194-195 Turbulence kinetic energy business Tidal power CFD analysis Geology |
| Zdroj: | Sustainability Volume 12 Issue 15 Sustainability, Vol 12, Iss 5985, p 5985 (2020) |
| ISSN: | 2071-1050 |
| DOI: | 10.3390/su12155985 |
| Popis: | The blade number of a current tidal turbine is one of the essential parameters to increase the stability, performance and efficiency for converting tidal current energy into rotational energy to generate electricity. This research attempts to investigate the effect of blade number on the performance of a small-scale horizontal tidal current turbine in the case of torque, thrust coefficient and power coefficient. Towards this end and according to the blade element momentum theory, three different turbines, i.e., two, three and four-bladed, were modeled using Solidworks software based on S-814 airfoil and then exported to the ANSYS-FLUENT for computational flow dynamics (CFD) analysis. SST-K-&omega turbulence model was used to predict the turbulence behavior and several simulations were conducted at 2 &le tip speed ratio &le 7. Pressure contours, turbulence kinetic energy contours, cut-in-speed-curves, and streamlines around the blades and rotors were extracted and compared to provide an ability for a deep discussion on the turbine performance. The results show that in the case of obtainable power, the optimal value of tip speed ratio is around 5, so that the maximum power was achieved for the four-bladed turbine. Out of optimal condition, higher blade number and lower blade number turbines should be used at less than and greater than the optimal values of tip speed ratio, respectively. The results of simulations for the three-bladed turbine were validated against the experimental data with good agreement. |
| Databáze: | OpenAIRE |
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