Research on hydrodynamic performance of S-type turbine based on linear wave

Area of Science:

• Hydrodynamics
• Renewable Energy
• Turbine Technology

Background:

• Savonius type turbines (S-type turbines) are explored for wave energy conversion.
• Understanding their performance in dynamic wave fields is crucial for efficient energy harvesting.

Purpose of the Study:

• To investigate the hydrodynamic performance of S-type turbines in a wave environment.
• To compare different S-type turbine configurations and identify optimal designs for wave energy capture.

Main Methods:

• Combined numerical simulations using Star CCM+ with physical experiments.
• Utilized overlapping grid technology and a Dynamic Fluid Body Interaction (DFBI) model for simulations.
• Developed a physical test system to validate simulation results under various wave conditions.

Main Results:

• The inverted horizontal axis S-type turbine arrangement demonstrated superior performance compared to positive S-shape and vertical axis configurations.
• The inverted design captured more than three times the energy of other arrangements.
• Optimal wave energy capture is achieved when the turbine's fluctuating rotation speed closely matches the wave frequency.

Conclusions:

• The inverted horizontal axis S-type turbine is a highly effective configuration for wave energy conversion.
• Matching turbine rotation to wave frequency is critical for maximizing energy capture.
• Findings provide valuable guidance for the practical engineering of wave energy systems.