Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
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NUMERICAL STUDY ON SYNTHETIC-JET-BASED FLOW SUPPLYING DEVICE

합성제트 기반의 유량 공급 장치에 대한 수치적 연구

  • Park, M. (Department of Aerospace Engineering, Seoul National University) ;
  • Lee, J. (Department of Aerospace Engineering, Seoul National University) ;
  • Kim, C. (Department of Aerospace Engineering, Seoul National University)
  • 박명우 (서울대학교 기계항공공학부) ;
  • 이준희 (서울대학교 기계항공공학부) ;
  • 김종암 (서울대학교 기계항공공학부)
  • Received : 2015.01.02
  • Accepted : 2015.03.05
  • Published : 2015.03.31
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Abstract

Flow characteristics of synthetic jet based flow supplying devices have been computationally investigated for different device shapes. Jet momentum was produced by the volume change of a cavity by two piezoelectric-driven diaphragms. The devices have additional flow path compared with the original synthetic jet actuator, and these flow path changes the flow characteristics of synthetic jet actuator. Four non-dimensional parameters, which were functions of the shapes of the additional flow path, were considered as the most critical parameters in jet performance. Comparative studies were conducted to compare volume flow rate and jet velocity. Computed results were solved by 2-D incompressible Navier-Stokes solver with k-w SST turbulence model. Detailed computations revealed that the additional flow path diminishes suction strength of the synthetic jet actuator. In addition, the cross section area of the flow path has more influence over the jet performances than the length of the flow path. Based on the computational results, the synthetic jet based flow supplying devices could be improved by applying suitable shape of the flow path.

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References

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