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Flow, Turbulence and Combustion

, Volume 93, Issue 1, pp 25–36 | Cite as

The Vortical Structures in the Rear Separation and Wake Produced by a Supersonic Micro-Ramp

  • Xiao Wang
  • Yonghua Yan
  • Zhengzhong Sun
  • Chaoqun LiuEmail author
Article

Abstract

The vortical structures in the rear separation and wake region produced by a micro-ramp that immersed in a supersonic turbulent boundary layer are investigated. The small scale separation close to the trailing edge was revealed and this confirms the previous experimental observation. Between the reverse region and surrounding fast moving flow, a three-dimensional shear layer was formed, and vortices are generated. By using vortex line method, the spiral points were illustrated as the cross-sections of the Ω-shaped vortices that follow the shape of the separation. The vortical structure was analogous to that in the wake region, where similar Ω-shaped vortex which follows the deficit region caused by the micro-ramp can be observed. Finally, the revealed flow topology was conceived new and beneficial to the studying of wall bounded turbulence which involves similar vortical structures but in a smaller scale, compared with the vortical pattern in the current micro-ramp wake.

Keywords

MVG Shock boundary layer interaction Separation Vortex Wake 

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References

  1. 1.
    Babinsky, H., Li, Y., Pitt Ford, C.W.: Microramp control of supersonic oblique shock-wave/boundary-layer interactions. J. AIAA 47, 3 (2009)CrossRefGoogle Scholar
  2. 2.
    Neil, T., Babinsky, H.: Microvortex generators applied to flowfield containing a normal shock wave and diffuser. J. AIAA 49, 5 (2011)Google Scholar
  3. 3.
    Rybalko, M., Babinsky, H., Loth, E.: Vgs for a normal SBLI with a downstream diffuser. AIAA paper 2010–4464Google Scholar
  4. 4.
    Pierce, A.J., Li, Q., Shih, Y., Lu, F.K., Liu, C.: Interaction of microvortex generator flow with ramp-induced shock/boundary-layer interactions. AIAA 2011–32Google Scholar
  5. 5.
    Nolan, W.R., Babinsky, H.: Characterization of micro-vortex generators in supersonic flows. AIAA paper 2011–71Google Scholar
  6. 6.
    Yan, Y., Li, Q., Liu, C., Pierce, A., Lu, F., Lu, P.: Numerical discovery and experimental confirmation of vortex ring generation by microramp vortex generator. Appl. Math. Model. (2012). doi: 10.1016/j.apm.2012.01.015
  7. 7.
    Li, Q., Liu, C.: Implicit LES for supersonic microramp vortex generator: new discoveries and new mechanism. Model. Simul. Eng. doi: 10.1155/2011/934982
  8. 8.
    Sun, Z., Schrijer, F.F.J., Scarano, F., van Oudheusden, B.W.: The three-dimensional flow organization past a micro-ramp in a supersonic boundary layer. Phys. Fluids accepted to appearGoogle Scholar
  9. 9.
    Li, Q., Liu, C.: Declining angle effects of the trailing edge of a microramp vortex generator. J. Aircr. 47(6) (2010)Google Scholar
  10. 10.
    Li, Q., Yan, Y., Lu, P., Pierce, A., Liu, C., Lu, F.: Numerical and experimental studies on the separation topology of the MVG controlled flow at M = 2.5. AIAA paper 2011–72Google Scholar
  11. 11.
    Yan, Y., Li, Q., Liu, C., Lu, F.: Numerical, experimental and theoretical studies on mechanism of K-H instability and ring generation behind supersonic MVG. AIAA paper 2011–676Google Scholar
  12. 12.
    Lu, F.K., Pierce, A.J., Shih, Y., Liu, C., Li, Q.: Experimental and numerical study of flow topology past micro vortex generators. AIAA 2010–4463Google Scholar
  13. 13.
    Lu, F.K., Li, Q., Shih, Y., Pierce, A.J., Liu, C.: Review of micro vortex generators in high speed flow. AIAA paper 2011–31Google Scholar
  14. 14.
    Anderson, B.H., Tinnapple, J., Surber, L.: Optimal control of shock wave turbulent boundary layer interactions using micro-array actuation. AIAA paper 2006–3197Google Scholar
  15. 15.
    Piller, M., Nobile, E.: Direct numerical simulation of turbulent heat transfer in a square duct. Int. J. Numer. Method. Heat Fluid Flow 12(6), 658–686 (2002)CrossRefzbMATHGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  • Xiao Wang
    • 1
  • Yonghua Yan
    • 1
  • Zhengzhong Sun
    • 2
  • Chaoqun Liu
    • 1
    Email author
  1. 1.Math DepartmentUniversity of Texas at ArlingtonArlingtonUSA
  2. 2.Faculty of Aerospace EngineeringDelft University of TechnologyDelftthe Netherlands

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