NUMERICAL INVESTIGATION OF BLADE TIP LOSS EFFECT ON THE TORQUE OF H-ROTOR VERTICAL-AXIS WIND TURBINE

Authors

  • Tan Chun Khai Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, 54100 Kuala Lumpur, Malaysia
  • Ahmad Faiz Mohammad Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, 54100 Kuala Lumpur, Malaysia
  • Nurizzatul Atikha Rahmat Faculty of Mechanical and Automotive Engineering Technology, Universiti Malaysia Pahang Al-Sultan Abdullah, 26600 Pekan, Pahang, Malaysia
  • Sheikh Ahmad Zaki Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, 54100 Kuala Lumpur, Malaysia
  • Farah Liana Mohd Redzuan Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, 54100 Kuala Lumpur, Malaysia

DOI:

https://doi.org/10.11113/jtse.v11.229

Keywords:

blade tip loss; H-rotor vertical-axis wind turbine; computational fluid dynamics

Abstract

This study examined blade tip loss to understand flow separation around H-Rotor Vertical-Axis Wind Turbines (VAWTs). Vortex development around the blade tip requires flow separation. Near the blade tip, separation creates concentrated vorticity and vortices. Blade tip vortices affect Vertical Axis Wind Turbine (VAWT) efficiency. Understanding flow separation and vortex dynamics improves VAWT performance. This study uses 3D CFD using the Improved Delayed Detached Eddy Simulation (IDDES) turbulence model. Simulation accuracy can be studied using several test cases with different grid densities and time step durations. Comparisons include instantaneous, overall blade torque coefficient, and span-wise torque coefficient. The mid-span of the blade has the maximum torque coefficient, which drops towards the tip, reducing performance owing to tip loss. This shows that IDDES can capture blade tip vortices' creation and behaviour. Comparing IDDES simulation results with experimental data shows that it can simulate sophisticated H-Rotor VAWT vortex dynamics. Blade tip vortices affected H-Rotor VAWT torque in this investigation. The IDDES turbulence model, mesh, and time step selection demonstrate the importance of correct simulation in VAWT performance optimisation. Energy efficiency is improved by more precisely designing and operating complicated wind energy systems.

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Published

2024-05-30

How to Cite

Chun Khai, T., Mohammad , A. F., Rahmat , N. A., Zaki , S. A., & Mohd Redzuan , F. L. (2024). NUMERICAL INVESTIGATION OF BLADE TIP LOSS EFFECT ON THE TORQUE OF H-ROTOR VERTICAL-AXIS WIND TURBINE . Journal of Transport System Engineering, 11(1), 56–62. https://doi.org/10.11113/jtse.v11.229

Issue

Section

Transport System Engineering

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