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Effect of self-issuing jets along the span on the near-wake of a square cylinder

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Abstract

The study herein focuses on the vortex shedding characteristics and near-wake vorticity patterns of a square cylinder having self-issuing jets through holes along its span. Three different values of spacing between the consecutive holes λ with respect to the cylinder diameter D, i.e., λ/D = 1.5, 3 and 4 are studied experimentally via Digital Particle Image Velocimetry for the Reynolds number range extending from 200 to 1,000. It has been observed that the three-dimensionality of the wake flow depends on the spacing between the holes and Re number. For sufficiently low Reynolds numbers, the jet flows issuing from the holes yield a non-uniform distribution of mean flow characteristics like the shedding frequency and the formation length of vortices along the span of the cylinder when the spacing between jets along centerline is close to wavelength of the naturally existing three-dimensional wake instability. Additionally, for Re number up to 500, the self-issuing jets emanating from the holes show an indirect interaction with shear layers originating from upper and lower separation lines of the cylinder. However, for higher Re numbers of 750 and 1,000, they directly interact with and modify the vortices forming from the cylinder.

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References

  • Arcas DR, Redekopp LG (2004) Aspects of wake vortex control through base blowing/suction. Phsy Fluids 16:452–456

    Article  Google Scholar 

  • Baek H, Karniadakis GE (2009) Suppressing vortex-induced vibrations via passive means. J Fluids Struct 25:848–866

    Article  Google Scholar 

  • Bearman PW (1967) The effect of base bleed on the flow behind a two-dimensional model with a blunt trailing edge. Aeronaut Quart 18:207–225

    Google Scholar 

  • Bearman PW (1997) Near wake flows behind two- and three-dimensional bluff bodies. J Wind Eng Ind Aerodyn 69–71:33–54

    Article  Google Scholar 

  • Bearman PW, Brankovic M (2004) Experimental studies of passive control of vortex-induced vibration. Eur J Mech B Fluids 23:9–15

    Article  MATH  Google Scholar 

  • Bearman PW, Tombazis N (1993) The effect of 3-dimensional imposed disturbances on bluff-body near wake flows. J Wind Eng Ind Aerodyn 49:339–349

    Article  Google Scholar 

  • Chomaz JM, Huerre P, Redekopp LG (1988) Bifurcation of local and global modes in spatially developing flows. Phys Rev Lett 60:25–28

    Article  Google Scholar 

  • Clements RR, Maull DJ (1975) The representation of sheets of vorticity by discrete vortices. Prog Aerospace Sci 16:129–146

    Article  Google Scholar 

  • Dong S, Triantafyllou GS, Karniadakis GE (2008) Elimination of vortex streets in bluff-body flows. Phys Rev Lett 100:204501

    Article  Google Scholar 

  • Eisenlohr H, Eckelmann H (1989) Vortex splitting and its consequences in the vortex street wake of cylinders at low Reynolds number. Phys Fluids A 1:189–192

    Article  Google Scholar 

  • Fransson JHM, Konieczny P, Alfredsson PH (2004) Flow around a porous cylinder subject to continuous suction or blowing. J Fluids Struct 19:1031–1048

    Article  Google Scholar 

  • Fu H, Rockwell D (2005) Shallow flow past a cylinder: control of the near wake. J Fluid Mech 539:1–24

    Article  MATH  Google Scholar 

  • Gerrard JH (1966) The mechanics of the formation region of vortices behind bluff bodies. J Fluid Mech 25:401–413

    Article  Google Scholar 

  • Gerrard JH (1978) The wakes of cylindrical bluff bodies at low Reynolds number. Phil Trans Roy Soc (London) Ser A 288(1354):351–382

    Article  Google Scholar 

  • Hangan H, Kim J (2003) Aerodynamic slot-control of 2D square prisms. J Wind Eng Ind Aerodyn 91:1847–1857

    Article  Google Scholar 

  • Hourigan K, Thompson MC, Tan BT (2001) Self-sustained oscillations in fows around long blunt plates. J Fluids Struct 15:387–398

    Article  Google Scholar 

  • Igarashi T (1978) Flow characteristics around a circular cylinder with a slit. Bull Jpn Soc Mech Eng 21:656–664

    Google Scholar 

  • Khor M, Sheridan J, Thompson MC, Hourigan K (2008) Global frequency selection in the observed time-mean wakes of circular cylinders. J Fluid Mech 601:425–441

    Article  MATH  Google Scholar 

  • Kim J, Choi H (2005) Distributed forcing of flow over a circular cylinder. Phys Fluids 17:033103

    Article  Google Scholar 

  • Koutmos P, Papailiou D, Bakrozis A (2004) Experimental and computational study of square cylinder wakes with two-dimensional injection into the base flow region. Eur J Mech B Fluids 23:353–365

    Article  MATH  Google Scholar 

  • Leu T-S, Ho C-M (2000) Control of global instability in a non-parallel near wake. J Fluid Mech 404:345–378

    Article  MATH  Google Scholar 

  • Li Z, Navon IM, Hussaini MY, Le Dimet FX (2003) Optimal control of cylinder wakes via suction or blowing. Comput Fluids 32:149–171

    Article  MATH  Google Scholar 

  • Okajima A (1982) Strouhal numbers of rectangular cylinders. J Fluid Mech 123:379–398

    Article  Google Scholar 

  • Ozgoren M (2006) Flow structure in the downstream of square and circular cylinders. Flow Meas Instrum 17:225–235o

    Article  Google Scholar 

  • Robichaux J, Balachander S, Vanka SP (1999) Three-dimensional Floquet instability of the wake of square cylinder. Phys Fluids 11:540–578

    Article  Google Scholar 

  • Saha AK, Biswas G, Muralidhar K (2003) Three-dimensional study of flow past a square cylinder at low Reynolds number. Int J Heat Fluid Flow 24:54–66

    Article  Google Scholar 

  • Sohankar A, Norberg C, Davidson L (1999) Simulation of three-dimensional flow around a square cylinder at moderate Reynolds number. Phys Fluids 11(2):288–306

    Article  MATH  Google Scholar 

  • Thompson MC, Hourigan K, Sheridan J (1996) Three dimensional instabilities in the wake of circular cylinder. Exp Therm Fluid Sci 12:190–196

    Article  Google Scholar 

  • Thompson MC, Leweke T, Williamson CHK (2001) The physical mechanism of transition in bluff body wakes. J Fluids Struct 15:607–616

    Article  Google Scholar 

  • Williamson CHK (1989) Oblique and parallel modes of vortex shedding in the wake of a circular-cylinder at low Reynolds numbers. J Fluid Mech 206:579–627

    Article  Google Scholar 

  • Williamson CHK (1996) Vortex dynamics in cylinder wake. Annu Rev Fluid Mech 28:477–539

    Article  Google Scholar 

  • Wong HY (1985) Wake flow stabilization by the action of base bleed. J Fluids Eng 107:378–384

    Article  Google Scholar 

  • Wood CJ (1964) The effect of base bleed on a periodic wake. J Roy Aero Soc 68:477–482

    Google Scholar 

  • Wood CJ (1967) Visualization of an incompressible wake with base bleed. J Fluid Mech 29:259–272

    Article  Google Scholar 

  • Zdravkovich MM (1981) Review and classification of various aerodynamic and hydrodynamic means for suppressing vortex shedding. J Wind Eng Ind Aerodyn 7(2):145–189

    Article  Google Scholar 

  • Zhang HQ, Fey U, Noack BR, Konig M, Eckelmann H (1995) On the transition of the cylinder wake. Phys Fluids 7(4):779–794

    Article  Google Scholar 

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Authors and Affiliations

  1. Department of Aeronautical Engineering, Istanbul Technical University, Maslak-Ayazaga, Istanbul, 34469, Turkey

    B. T. Aydın, O. Cetiner & M. F. Unal

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  1. B. T. Aydın
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  2. O. Cetiner
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  3. M. F. Unal
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Correspondence to M. F. Unal.

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Aydın, B.T., Cetiner, O. & Unal, M.F. Effect of self-issuing jets along the span on the near-wake of a square cylinder. Exp Fluids 48, 1081–1094 (2010). https://doi.org/10.1007/s00348-009-0793-4

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  • DOI: https://doi.org/10.1007/s00348-009-0793-4

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