Vortex Structure of a Synthetic Jet Issuing into a Turbulent Boundary Layer from a Finite-span Rectangular Orifice

2020 ◽  
Author(s):  
Randy Belanger ◽  
David W. Zingg ◽  
Philippe Lavoie
Keyword(s):  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Vortex Structure ◽  
Synthetic Jet ◽  
Finite Span

scholarly journals Scalings for rectangular synthetic jet trajectory in a turbulent boundary layer

2021 ◽  
Vol 915 ◽  
Author(s):  
Girish K. Jankee ◽  
Bharathram Ganapathisubramani
Keyword(s):  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Synthetic Jet ◽  
Jet Trajectory

Abstract

scholarly journals Effects of Synthetic Jet Array on Turbulent Boundary Layer

2019 ◽  
Vol 37 (3) ◽  
pp. 893-898
Author(s):  
Zhixian Ye ◽  
Yiyang Jiang ◽  
Yang Zhang ◽  
Jianfeng Zou ◽  
Yao Zheng
Keyword(s):  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Synthetic Jet ◽  
Jet Array

scholarly journals 208 Experiments on the Turbulent Boundary Layer on a Cylinder Rotating in an Axial Flow : Spiral-Vortex Structure(1)

2007 ◽  
Vol 2007 (0) ◽  
pp. _208-a_
Author(s):  
Shintaro YAMASHITA ◽  
Chiharu FUKUSHIMA ◽  
Yoshihiro INOUE ◽  
Makoto NISHIGAKI ◽  
Haruhisa YANO
Keyword(s):  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Vortex Structure ◽  
Axial Flow ◽  
Spiral Vortex

Phase Locked Analysis of a Simplified Car Geometry Wake Flow Control Using Synthetic Jet

2006 ◽  
Author(s):  
Ce´dric Leclerc ◽  
Euge´nie Levallois ◽  
Quentin Gallas ◽  
Patrick Gillie´ron ◽  
Azeddine Kourta
Keyword(s):  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Drag Reduction ◽  
Vortex Shedding ◽  
Aerodynamic Drag ◽  
Streamwise Velocity ◽  
Local Effect ◽  
Synthetic Jet ◽  
Wake Flow ◽  
Synthetic Jet Actuator

This paper presents a numerical unsteady analysis of a SJA impact on a car wake flow. First, for the optimal reduced frequency F+, the influence of the Cμ on the mean aerodynamic drag reduction 〈Cd〉 is observed. A spectral analysis of the vortex shedding coming from the upper and the lower part of the car and of the drag coefficient is then presented for different Cμ values. Preliminary results suggest that maximum drag reduction is obtained when most energy in the wake comes from the actuator forcing frequency rather than the natural vortex shedding frequencies of the two contributions. This work is completed by a phase locked analysis of the synthetic jet actuator local effect on the turbulent boundary layer just before the flow separation. For the fixed optimal F+, different Cμ values are compared. The streamwise velocity profiles seem to show that maximal efficiency of the control is obtained when the synthetic jet injected momentum is introduced in the logarithmic sub-layer part of the turbulent boundary layer.

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