Characteristics of small-scale synthetic jets - Numerical investigation

Hui Tang, Shan Zhong

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)


In synthetic jet actuators with an orifice diameter typically less than 1 mm (termed as small-scale synthetic jet actuators), the compressibility and viscosity effects often become significant causing them behave differently from large-scale synthetic jets. In this paper, a numerical study of the synthetic jet from an orifice diameter of 0.5 mm is undertaken and the results are compared with the synthetic jet from an orifice diameter of 5 mm. The results reveal that, given the same dimensionless parameters L and ReL, the appearance and circulation of vortex rings produced from synthetic jets of different scales are identical in the near field. It is also found that although the linear relationships between (L and ReL) and actuator operating conditions observed for large-scale synthetic jets are no longer valid for small-scale synthetic jets, the linear relationships between the dimensionless jet performance parameters and (L and ReL) still exist. This finding is very useful to support the development of low-dimensional predictions models.
Original languageEnglish
Title of host publicationIUTAM Symposium on Flow Control and MEMS - Proceedings of the IUTAM Symposium
Number of pages6
Publication statusPublished - 1 Dec 2008
Externally publishedYes
EventIUTAM Symposium on Flow Control and MEMS - London, United Kingdom
Duration: 19 Sept 200622 Sept 2006

Publication series

NameSolid Mechanics and its Applications
ISSN (Print)1875-3507


ConferenceIUTAM Symposium on Flow Control and MEMS
Country/TerritoryUnited Kingdom


  • CFD simulation
  • Synthetic jet

ASJC Scopus subject areas

  • Aerospace Engineering
  • Automotive Engineering
  • Civil and Structural Engineering
  • Mechanical Engineering
  • Acoustics and Ultrasonics


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