Enhancing Jet Velocity and Power Conversion Efficiency of Piezoelectric Synthetic Jet Actuators

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GÜNGÖRDÜ B., Jabbal M., Popov A. A.

AIAA Journal, vol.61, no.10, pp.4321-4331, 2023 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 61 Issue: 10
  • Publication Date: 2023
  • Doi Number: 10.2514/1.j062930
  • Journal Name: AIAA Journal
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Applied Science & Technology Source, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, zbMATH, Civil Engineering Abstracts
  • Page Numbers: pp.4321-4331
  • Keywords: Fluidic-to-electric Efficiency, Piezoelectric Actuators, PMN-PT, Synthetic Jet Actuator
  • Middle East Technical University Affiliated: Yes

Abstract

The present work discusses an experimental investigation into the effect of piezoceramic employed to drive a synthetic jet actuator into a quiescent flow. The electromechanical coupling ratio of polycrystalline piezoceramics, lead zirconate–titanate 5A/5H (PZT-5A/5H), conventionally used in synthetic jet actuators, is inherently low. Therefore, this study aims to investigate using more electromechanically efficient piezoceramics, such as single-crystal, lead magnesium niobate–lead titanate (PMN-PT). In addition, two different orifice-diaphragmconfigurations of synthetic jet actuators, opposite and adjacent, are tested. It is identified thatPMN-PT piezoceramic promotes three times higher transverse diaphragm displacement and two times more peak jet velocity compared to the PZT-5A piezoelectric actuator for the same input diaphragm voltage. A peak exit jet velocity of 99.5 m⋅ s−1 was obtained at 40 V of peak supply voltage, which can be classified as a low voltage supply compared to other studies in the literature that obtained similar exit jet velocity. Also, a power conversion efficiency of 72% was achieved, corresponding to the Helmholtz resonance frequency. A new figure-of-merit, momentum coefficient per power consumption, is defined to evaluate the potential impact for full-scale implementation. A state-of-the-art value of 0.09 MW−1 is achieved.