Ultra-low wind speed piezoelectric windmill

Ravi Anant Kishore, Dušan Vučković, Shashank Priya

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


We report an ultra-low start-up speed windmill that consists of a 72 mm diameter horizontal axis wind turbine rotor with 12 alternating polarity magnets around its periphery and a 60 mm × 20 mm × 0.7 mm piezoelectric bimorph element having a magnet at its tip. This wind turbine operates at very low Reynolds number of around 2×104, but still it has reasonably high power coefficient of about 11% at the optimal tip speed ratio of 0.7. It was found to produce peak electric power of 450 μW at the rated wind speed of 4.2 mph. An extremely low start-up wind speed of 2.4 mph was achieved by operating the bimorph in actuator mode.

Original languageEnglish (US)
Pages (from-to)98-107
Number of pages10
Issue number1
StatePublished - Feb 17 2014

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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