Characterization of flow vectoring phenomenon in adjacent synthetic jets using CFD and PIV

•Experimentally validated CFD simulation of a pair of adjacent synthetic jets.•Prediction of the flow vectoring phenomenon induced by adjacent synthetic jets.•Investigation of the effect of phase difference on the vectoring of the merged jet.•A better understanding of the fluid mechanics of adjacent...

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Bibliographic Details
Published in:Computers & fluids 2016-11, Vol.140, p.232-246
Main Authors: Alimohammadi, Sajad, Fanning, Eoin, Persoons, Tim, Murray, Darina B.
Format: Article
Language:English
Subjects:
Active control
Adaptive control
CFD
Computational fluid dynamics
Computer simulation
Finite element method
Flow characteristics
Flow control
Flow vectoring
Fluid flow
Fluid mechanics
Heat transfer
Holes
Internal flow
Jet flow
Particle image velocimetry
Phase difference
Phase shift
PIV
Reynolds number
Separation
Synthetic jets
Velocity measurement
Vortex dynamics
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Summary:•Experimentally validated CFD simulation of a pair of adjacent synthetic jets.•Prediction of the flow vectoring phenomenon induced by adjacent synthetic jets.•Investigation of the effect of phase difference on the vectoring of the merged jet.•A better understanding of the fluid mechanics of adjacent synthetic jets.•Characterisation of mass transport by operation of side by side jets. Flow vectoring by a pair of synthetic jets is suitable for modification of the global flow characteristics with practical applications in active flow control and adaptive heat convection. The interaction of a pair of synthetic jets, with a separation distance s=3.3D, stroke length L0=29D, and Reynolds number Re=300, are investigated numerically using computational fluid dynamics (CFD) and experimentally using particle image velocimetry (PIV). To achieve the most realistic calculation of the flow induced by synthetic jets, a full unsteady RANS simulation is performed of the internal flow in two cavities as well as the external jet flow using a dynamic mesh technique. The results for the intricate flow vectoring phenomenon show a reasonable quantitative agreement with PIV measurements, with a maximum deviation from PIV measurements of 14% for stream-wise centreline velocity in 10
ISSN:0045-7930
1879-0747
DOI:10.1016/j.compfluid.2016.09.022