An experimental investigation of passive variable-pitch vertical-axis ocean current turbine

Ridho Hantoro*, I. K.A.P. Utama, Erwandi, Aries Sulisetyono

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


Vertical-axis hydrokinetic turbines with fixed pitch blades typically suffer from poor starting torque, low efficiency and shaking due to large fluctuations in both radial and tangential force with azimuth angle. Maximizing the turbine power output can be achieved only if the mechanism of generation of the hydrodynamic force on the blades is clearly identified and tools to design high-performance rotors are developed. This paper describes an initial experimental investigation to understand more of the performance on vertical-axis turbine related to the effect of fixed-pitch and passive variable-pitch application using airfoil NACA 0018. Comparative analysis according to aspects of rotation and tip speed ratios was discussed. Information regarding the changes of foil position in passive variable-pitch during rotation at a limited range of flow velocity variations test was obtained and analyzed.

Original languageEnglish
Pages (from-to)27-40
Number of pages14
JournalITB Journal of Engineering Science
Volume43 B
Issue number1
Publication statusPublished - 2011
Externally publishedYes


  • Naca 0018
  • Ocean current turbine
  • Passive variable-pitch
  • Vertical axis


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