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Experimental Study of Inverted Flags Configuration Effect on Energy Harvesting

Fathizadeh, Ali | 2020

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 52849 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Ebrahimi, Abbas
  7. Abstract:
  8. In this study, the effect of two inverted piezoelectric flags arrangement on energy harvesting and the kinematics of limited amplitude oscillations which occurs due to flutter instability has been studied experimentally. For this purpose, first a study on piezoelectric materials for application in energy harvesting was carried out. Then, constraints and effective parameters of the inverted flag problem were obtained in terms of structure, fluid and electricity coupling. In the next step, according to these constraints and parameters, a test platform was designed and was built for experimental tests. A circuit with low amount of loss was designed and built to measure the perceptual power. Afterward, various tandem and staggered configurations of the two inverted flags were tested. Two key factors in harvesting energy from inverted flags were investigated: the instability flow speed and output power. It was observed that the power obtained from the upstream flag rose slightly under the effect of the other flag. In the case of the downstream flag in general the output power was reduced slightly, but the scale of the reduction and flag behaviour varied at different configurations. The speed range in which flags oscilate for energy harvesting widened dramatically and expanded as much as 300 percents
  9. Keywords:
  10. Energy Harvesting ; Piezoelectric ; Flow Induced Vibration ; Inverted Flag ; Piezoelectric Flags Arrangement

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