Multi objective optimization of a synthetic jet acting on a separated flow over a hump

Masamichi Nakamura, Taku Nonomura, Yoshifumi Inatani

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The control parameters for a synthetic jet acting on a separated flow over hump are optimized using multi-objective optimization and effects of separation control are discussed. The following three parameters are used for operation of a synthetic jet: a synthetic jet position, a maximum velocity of jet and a synthetic jet frequency. A direct numerical simulation is performed by solving compressible, unsteady, laminar flows over a half cylindrical hump in two dimensions, and effectiveness of each operation of a synthetic jet is investigated. The optimization results show that periodic actuation improves aerodynamic coefficients. In particular, the performance of the synthetic jet placed around the top of the hump is better than other positions. It is found that the lift coefficient is maximized when a synthetic jet act at a low frequency in forward. Also it is found that the drag coefficient is minimized when a synthetic jet act at a high frequency in backward.

Original languageEnglish
Title of host publication43rd Fluid Dynamics Conference
Publication statusPublished - 2013 Sept 11
Externally publishedYes
Event43rd AIAA Fluid Dynamics Conference - San Diego, CA, United States
Duration: 2013 Jun 242013 Jun 27

Publication series

Name43rd Fluid Dynamics Conference


Other43rd AIAA Fluid Dynamics Conference
Country/TerritoryUnited States
CitySan Diego, CA

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Energy Engineering and Power Technology
  • Aerospace Engineering
  • Mechanical Engineering


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