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This study presents a two-dimensional (2D) numerical investigation of a semicircular two-bladed Savonius hydrokinetic turbine (SHKT) aimed at enhancing its energy extraction performance. Using the Unsteady Reynolds-Averaged Navier-Stokes (URANS) approach with the SST (Shear Stress Transport) k–ω turbulence model, the flow behavior and performance characteristics of the turbine were analysed. The model was validated against experimental data with a maximum deviation of 6.31%, confirming its predictive accuracy. Key results show that the pressure difference between the advancing and returning blades drives turbine rotation, while vortex formation and stagnation zones near the returning blade reduce efficiency. Velocity and turbulence contours revealed asymmetric wake formation and localized energy dissipation downstream. The validated model provides a reliable framework for further parametric studies. Future work will focus on integrating deflector plates upstream and downstream to improve flow guidance and turbine performance.

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Savonius Hydrokinetic to Harness Energy from Marine Currents

  • 会议论文

  • 发表日期：

    2026年

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  • Adarsh Parasuram,
  • Avinash G. Shahabadi,
  • Abdus Samad

摘要

This study presents a two-dimensional (2D) numerical investigation of a semicircular two-bladed Savonius hydrokinetic turbine (SHKT) aimed at enhancing its energy extraction performance. Using the Unsteady Reynolds-Averaged Navier-Stokes (URANS) approach with the SST (Shear Stress Transport) k–ω turbulence model, the flow behavior and performance characteristics of the turbine were analysed. The model was validated against experimental data with a maximum deviation of 6.31%, confirming its predictive accuracy. Key results show that the pressure difference between the advancing and returning blades drives turbine rotation, while vortex formation and stagnation zones near the returning blade reduce efficiency. Velocity and turbulence contours revealed asymmetric wake formation and localized energy dissipation downstream. The validated model provides a reliable framework for further parametric studies. Future work will focus on integrating deflector plates upstream and downstream to improve flow guidance and turbine performance.