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A single circular synthetic jet issued into turbulent boundary layer

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Abstract

An experimental investigation has been undertaken to study the behaviour of a single circular synthetic jet issued into turbulent boundary layer produced on a flat plate in cross flow. At the given free-stream conditions, the jet is also issued into laminar boundary layer so that an effective evaluation on the interaction of the vortices with the changing boundary layer could be made. The flow visualization technique is used in conjunction with the stereoscopic imaging system to reveal a unique quasi three-dimensional recognition of the vortices formed in either type of boundary layer under varying synthetic jet actuator (SJA) operating conditions. Firstly, the laminar boundary layer is produced on the flat plate with zero pressure gradient and later on the same boundary layer is triggered to turbulence using a trigger device. The free-stream conditions are justified by PIV measurements, in that the velocity profiles are drawn at given streamwise locations for both laminar and turbulent boundary layers. The parametric map is given to identify and bound the SJA operating parameters to produce the explicit vortical structures at the given conditions.

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Abbreviations

D c :

Cavity diameter, mm

L :

Dimensionless stroke length

U :

Characteristic velocity, m/s

y :

Normal distance from wall, mm

δ :

Boundary layer thickness, mm

ρ :

Fluid density, kg/m3

Re L :

Reynolds number based on dimensionless stroke length

f :

Diaphragm oscillation frequency, Hz

St. :

Strouhal number

x :

Streamwise distance, mm

z :

Spanwise distance from centerline, mm

c f :

Skin friction coefficient

∆:

Diaphragm peak-to-peak displacement, mm

References

  • Acarlar MS, Smith CR (1987) A study of hairpin vortices in a laminar boundary layer; (P2) hairpin vortices generated by fluid injection. J Fluid Mech 175:43

    Article  Google Scholar 

  • Cater JE, Soria J (2002) The evolution of round zero-net-mass-flux jets. J Fluid Mech 472:167–200

    Article  MATH  Google Scholar 

  • Chaudhry IA, Zhong S (2012) Understanding the interaction of synthetic jet with the flat plate boundary layer. In: International conference on advanced research in mechanical engineering (ICARME), Trivandrum, India

  • Chaudhry IA, Zhong S (2013) The evolution of synthesized vortices in turbulent boundary layer. J Turbul 14(10):1–18

    Article  MathSciNet  Google Scholar 

  • Chaudhry IA, Zia RT (2012) PIV investigation into the evolution of vortical structures in the zero pressure gradient boundary layer. World Acad Sci Eng Technol 60(71):27–33

    Google Scholar 

  • Clauser FH (1956) The turbulent boundary layer in advances in applied mechanics, V, vol IV. Ac. Pr, New York

    Google Scholar 

  • Crook A, Wood NJ (2001) Measurements and visualisations of synthetic jets. In: Proceedings of 39th AIAA aero sciences meeting and exhibit, Reno, NV, USA, Paper 2001-0145

  • Glezer A (1988) The formation of vortex rings. Phys Fluids 31(9):3532–3542

    Google Scholar 

  • Glezer A, Amitay M (2002) Synthetic jets. Annu Rev Fluid Mech 34:503–529

    Article  MathSciNet  Google Scholar 

  • Haidari AH, Smith CR (1994) The generation and regeneration of single hairpin vortices. J Fluid Mech 277:135–162

    Article  Google Scholar 

  • Hont L, Walker JD (1987) An analysis of the motion and effects of hairpin vortices. Tech. Rep. FM-11, Department of M.E. and Mech., Lehigh University, Bethlehem, PA

  • Peridier VJ, Smith FT, Walker JDA (1991) Vortex-induced boundary-layer separation (Part 2) unsteady interacting boundary-layer theory. J Fluid Mech 232:133–165

    Article  MATH  MathSciNet  Google Scholar 

  • Robinson SK (1991) Coherent motions in the turbulent boundary layer. Annu Rev Fl Mech 23:601–639

    Article  Google Scholar 

  • Smith CR, Walker JD, Haidari AH, Sobrun U (1991) On the dynamics of near-wall turbulence. Phys Sci Eng 336(1641):131–175

    Google Scholar 

  • Tang H, Zhong S (2006) Incompressible flow model of synthetic jet actuators. AIAA J 44(4):908–912

    Article  Google Scholar 

  • Zhong S, Millet F, Wood NJ (2005) The behaviour of circular synthetic jets in a laminar boundary layer. Aeronaut J 109(1100):461–470

    Google Scholar 

  • Zhou J, Zhong S (2008) Numerical simulations of the interactions of circular synthetic jets with a boundary layer. Comput Fluids 38:393–405

    Google Scholar 

  • Zhou J, Adrian RJ, Balachandar S, Kendall TM (1999) Mechanisms for generating coherent packets of hairpin vortices in channel flow. J Fluid Mech 387:353–396

    Article  MATH  MathSciNet  Google Scholar 

Download references

Acknowledgments

The first author would like to thank University of Engineering and Technology Lahore, Pakistan to fund for his PhD studies and the moral support. Thanks to Dr. Zhang, S. for his valuable assistance to build the rig for the experimental work.

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Correspondence to Ishtiaq A. Chaudhry.

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Chaudhry, I.A., Zhong, S. A single circular synthetic jet issued into turbulent boundary layer. J Vis 17, 101–111 (2014). https://doi.org/10.1007/s12650-014-0199-0

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  • DOI: https://doi.org/10.1007/s12650-014-0199-0

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