Skip to main content
SpringerLink
Log in

Investigation of different aspects of laminar horseshoe vortex system using PIV

  • Published:
Journal of Mechanical Science and Technology Aims and scope Submit manuscript

Abstract

Juncture flow is a classical fluid mechanics problem having wide applications in both aero and hydro dynamics. The flow separates upstream of the obstacle due to the adverse pressure gradient generated by it, with the formation of the vortical structure called “horseshoe vortex.” The current study is carried out for an elliptical leading edge obstacle placed on a flat plate to investigate the horseshoe vortex for a range of Reynolds number (ReW) based on maximum width (W) for which the incoming boundary layer is laminar. Four different types of horseshoe vortex systems were found: the steady, amalgamation, transition and breakaway. The transition vortex system is one after which the vortex system changes from amalgamation to breakaway. In this phase the vortex system alternatively undergoes both amalgamation and breakaway vortex cycles. The effect of variation in the chord wise shape of the obstacle is investigated. The quantitative measurements of PIV show that the vortex system does not undergo any significant change for different chord lengths of the model with the fixed aspect ratio and maximum width. The most upstream saddle point is also studied for steady horseshoe vortex region and found that it is the “saddle of attachment” where flow attaches to the plate surface instead of separating from it.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. R. Schwind, The three dimensional boundary layer near a strut, Gas Turbine Laboratory Report, MIT (1962).

    Google Scholar 

  2. R. S. Norman, On obstacle generated secondary flows in laminar boundary layers and transition to turbulence, Ph.D. Dissertation, Illinois Institute of Technology, Chicago, IL, USA (1972).

    Google Scholar 

  3. C. J. Baker, The laminar horseshoe vortex, Journal of Fluid Mechanics, 95 (1979) 347–367.

    Article  Google Scholar 

  4. C. J. Baker, The oscillation of horseshoe vortex systems, Journal of Fluids Engineering, 113 (1991) 489–495.

    Article  Google Scholar 

  5. M. R. Visbal, Structure of laminar juncture flows, AIAA J., 29(8) (1991) 1273–1282.

    Article  Google Scholar 

  6. M. J. Khan, A. Ahmed and J. R. Trosper, Dynamics of the juncture vortex, AIAA J., 33(7) (1995) 1273–78.

    Article  Google Scholar 

  7. C. V. Seal, C. R. Smith and J. D. A. Walker, Dynamics of the vorticity distribution in end wall junctions, AIAA J., 35(6) (1997) 1041–47.

    Article  Google Scholar 

  8. H. Zhang and Z. Y. Lu, The flow characteristics and its meliorationof swept wing/body interference, (Chinese) J. of BeijingUniv. of Aero. and Astro., 26(5) (2000) 592–595.

    Google Scholar 

  9. Q. D. Wei, G. Chen and X. D. Du, An experimental study on the structure of juncture flows, J. Vis., 3–4 (2001) 341–48.

    Article  Google Scholar 

  10. R. L. Simpson, Junction flows, Annual Review of Fluid Mechanics, 33 (2001) 415–443.

    Article  Google Scholar 

  11. C. Lin, P. H. Chiu and S. J. Shieh, Characteristics of horseshoe vortex system near a vertical plate-base plate juncture, Experimental Thermal and Fluid Science, 27 (2002) 25–46.

    Article  Google Scholar 

  12. C. Lin, W. J. Lai and K. A. Chang, Simultaneous particle image velocimetry and laser Doppler velocimetry measurements of periodical oscillatory horseshoe vortex system near square cylinder-base plate juncture, J. of Eng. Mech., 129(10) (2003) 1173–1188.

    Article  Google Scholar 

  13. M. J. Khan and A. Ahmed, Topological model of flow regimes in the plane of symmetry of a surface-mounted obstacle, Physics of Fluids, 17 (2005) 045101.

    Article  Google Scholar 

  14. Rodríguez y Domínguez M. Romero-Méndez, R., Ramospaláu, M. and Pérez-Gutiérrez, F. G., The laminar horseshoe vortex upstream of a short-cylinder confined in a channel formed by a pair of parallel plates, J. Vis., 9(3) (2006) 309–318.

    Article  Google Scholar 

  15. R. Rifki, A. Ahmed and M. J. Khan, Effect of aspect ratio on the end-wall flow of a streamlined cylinder, 23rd AIAA applied aerodynamics conference (2005).

    Google Scholar 

  16. Q. D. Wei, J. M. Wang, G. Chen, Z. B. Lu and W. T. Bi, Modification of junction flows by altering the section shapes of the cylinders, J. Vis., 11(2) (2008) 115–124.

    Article  Google Scholar 

  17. H. Zhang, L. Z. Yong and S. Shengdong. The experimental study on unsteady horseshoe vortex structure in juncture flow with PIV, (Chinese) Journal of Theoretical and Applied Mechanics, 40(2) (2008) 171–78.

    Google Scholar 

  18. M. Y. Younis, H. Zhang, B. Hu, M. A. Sohail and Zaka Muhammad, Laminar Horseshoe vortex for a triangular cylinder flat plate juncture, Proceedings of the Sixth International Conference on Fluid Mechanics AIP Conf. Proc. Volume, (2011) 113–115.

    Google Scholar 

  19. E. C. Maskell, Flow separation in three dimensions, RAE Aero. Report, (1955) 2655–2673.

    Google Scholar 

  20. M. J. Lighthill, Laminar boundary layers, In: Rosenhead, L. (ed) Oxford Univ. Press (1963).

  21. K. C. Wang, Separation patterns of boundary layer over an inclined body of revolution, AIAA. J., 10(8) (1972) 1044–1050.

    Article  Google Scholar 

  22. K. C. Wang, Separation of three-dimensional flow, MML, (1976) 76–54.

    Google Scholar 

  23. M. R. Visbal, Structure of laminar juncture flows, AIAA J., 29(8) (1991) 1273–1282.

    Article  Google Scholar 

  24. C. M. Hung, C. H. Sung and C. L. Chen, Computation of saddle point of attachment, AIAA J., 30(6) (1992) 1561–1569.

    Article  MATH  Google Scholar 

  25. C. L. Chen and C. M. Hung, Numerical study of juncture flows, AIAA J., 30(7) (1992) 1800–1807.

    Article  MATH  MathSciNet  Google Scholar 

  26. R. L. Puhak, A. T. Degani and J. D. A. Walker, Unsteady separation and heat transfer upstream of obstacles, Journal of Fluid Mechanics, 305 (1995) 1–27.

    Article  MATH  MathSciNet  Google Scholar 

  27. D. P. Rizetta, Numerical simulation of turbulent cylinder juncture flow fields, AIAA J., 32(6) (1994) 1113–1119.

    Article  Google Scholar 

  28. H. Chen, Assessment of a Reynolds stress closure model for appendage-hull junction flows, Journal of Fluid Engineering, 11l7 (1995) 557–563.

    Article  Google Scholar 

  29. M. D. Coon and M. Tobak, Experimental study of saddle point of attachment in laminar juncture flow, AIAA J., 33(22) (1995) 88–92.

    Google Scholar 

  30. H. Zhang, M. Y. Younis, B. Hu, H. Wang and X. Wang, Investigation of attachment saddle point structure of 3-D separation in laminar juncture flow using PIV, J. Vis., 15 (2012) 214–252.

    Article  Google Scholar 

  31. X. Wang, H. Zhang, H. Wang and L. Fu, New 3-D separation structure in juncture flows, J Beijing Univ Aeronaut Astronaut, 36(12) (2010) 1461–1466 (in Chinese).

    Google Scholar 

  32. H. X. Zhang, Structural analysis of separated flows and vortex motion, National Defense Industry Press, Beijing 2005 (in Chinese).

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. National Key Laboratory of Fluid Mechanics, School of Aeronautical Science and Engineering, Beihang University (BUAA), Beijing, 100086, China

    Muhammad Yamin Younis, Hua Zhang, Bo Hu & Zaka Muhammad

  2. School of Astronautics, Beihang University (BUAA), Beijing, 100086, China

    Saqib Mehmood

Authors
  1. Muhammad Yamin Younis
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Hua Zhang
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Bo Hu
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Zaka Muhammad
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Saqib Mehmood
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Muhammad Yamin Younis.

Additional information

Recommended by Associate Editor Simon Song

M. Y. Younis is a Ph.D. candidate at Baihang University (BUAA), Beijing, China, doing research on different aspects of juncture flows, with main focus on topology and control of horseshoe vortex. His B.Sc, in Mechanical Engineering is from UET Taxila, Pakistan and M.S. in Fluid Mechanics from Beihang University (BUAA), China.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Younis, M.Y., Zhang, H., Hu, B. et al. Investigation of different aspects of laminar horseshoe vortex system using PIV. J Mech Sci Technol 28, 527–537 (2014). https://doi.org/10.1007/s12206-013-1120-9

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s12206-013-1120-9

Keywords

Search

Navigation