This study examines an innovative turbine with the addition of the number and arrangement of straight blade cascaded (SBC). SBC is a combination of passive variable-pitch and fixed pitch of each turbine arm. This study was conducted in an open channel flow that has a current velocity (V-m/s) of 1.1, 1.2, and 1.3. RPM and torque ware measured for coefficient of performance (Cp) and tip speed ratio (TSR) calculation. Without changing the turbine dimension, the employment of cascaded blade (three blades in each arm) contributes to improve energy extraction significantly. A significant increase in Cp value is seen when 9 blades (3 cascaded blades per arm) are used with a Cp 0.42 value at TSR 2.19. This value has reached 93% of the maximum theoritical Cp value.

Original languageEnglish
Article number012023
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 15 May 2018
Event1st International Conference on Science, Mathematics, Environment and Education, ICoSMEE 2017 - Surakarta, Indonesia
Duration: 16 Sept 201716 Sept 2017


  • Cp
  • fixed pitch
  • hydrokinetic turbine
  • passive variable pitch
  • straight blade cascaded
  • vertical axis


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