Wind and Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

The effect of upstream low-drag vortex generators on juncture flows

  • Younis, Md.Y. (Department of Mechanical Engineering, Mirpur University of Science and Technology (MUST)) ;
  • Zhang, Hua (National Key Laboratory of Fluid Mechanics, Beihang University (BUAA)) ;
  • Hu, Bo (Department of Engineering Mechanics, Shijiazhuang Tiedao University) ;
  • Uddin, Emad (Department of Mechanical Engineering, SMME, National University of Science and Technology (NUST)) ;
  • Aslam, Jawad (Department of Mechanical Engineering, SMME, National University of Science and Technology (NUST))
  • Received : 2018.06.17
  • Accepted : 2019.02.10
  • Published : 2019.06.25
⟨ Previous Next ⟩

Abstract

Control of horseshoe vortex in the circular cylinder-plate juncture using vortex generator (VG) was studied at $Re_D$(where D is the diameter of the cylinder) = $2.05{\times}10^5$. Impact of a number of parameters e.g., the shape of the VG's, number of VG pairs (n), spacing between the VG and the cylinder leading edge (L), lateral gap between the trailing edges of a VG pair (g), streamwise gap between two VG pairs ($S_{VG}$) and the spacing between the two VG's in parallel arrangement ($Z_{VG}$) etc. were investigated on the horseshoe vortex control. The study is conducted using surface oil flow visualization and surface pressure measurements in low speed wind tunnel. It is observed that all the parameters studied have significant control effect, either by reduction in separation region or by lowering the adverse pressure along the symmetric axis upstream of the juncture.

Keywords

Acknowledgement

Supported by : NSFC

References

  1. Andoh, M., Motosuke, M. and Honami, S. (2009), "Interaction of longitudinal vortex with horseshoe vortex configuration effect of longitudinal vortex", Proceedings of the 39th AIAA Fluid dynamics conference, San Antonio, Texas, USA, June.
  2. Andoh, M., Motosuke, M. and Honami, S. (2010), "The interaction between horseshoe vortex and longitudinal vortices from the votex generator", Proceedings of the ASME Turbo Expo, Power for Land Sea and Air, Glasgow, UK.
  3. Baker, C.J. (1980), "The turbulent horseshoe vortex", J. Wind Eng. Ind. Aerod., 6, 9-23. https://doi.org/10.1016/0167-6105(80)90018-5
  4. Bijan, D. (1990), "Controlling mechanism of local scour", J. Hydraul. Eng. - ASCE, 116(10),1197-1214. https://doi.org/10.1061/(ASCE)0733-9429(1990)116:10(1197)
  5. Bloxham, M., Hollis, R. and Bons, J. (2008), "Horseshoe vortex control with leading edge endwall boundary layer removal", Proceedings of 4TH Flow Control Conference, Seattle, Washington, USA, June.
  6. Bons, J., Benton, S., Bernardini, C. and Bloxham, M. (2018), "Active flow control for low-pressure turbines", AIAA J. (Volume, Issue and page number not assigned yet).
  7. Dargahi, B. (1989), "The turbulent flow field around a circular cylinder", Exp. Fluids., 8(1-2), 1-12. https://doi.org/10.1007/BF00203058
  8. Devenport, W.J., Agarwal, N.K., Dewitz, M.B., Simpson, R.L. and Poddar, K. (1990). "Effects of a fillet on the flow past a wing body junction", AIAA J., 28(12), 2017-2024. https://doi.org/10.2514/3.10517.
  9. Doerffer, P., Flaszynski, P. and Magagnato, F. (2003), "Streamwise vortex interaction with a horseshoe vortex", J. Therm. Sci., 12(4), 304-309. https://doi.org/10.1007/s11630-003-0035-7
  10. Gupta, A.K. (1987), "Hydrodynamic modification of the horseshoe vortex at a verticle pier junction with ground", Phys. Fluids, 30(4), 1213-1215. https://doi.org/10.1063/1.866270.
  11. Honami, S., Andoh, M., Tanabe, S. and Motosuke, M. (2011), "Effects of co-rotating longitudinal vortices in turbulent structures in the leg of horseshoe vorticex", Proceedings of the ASME Turbo Expo., Vancouver, British Columbia, Canada, June.
  12. Hua, Z., Younis, M.Y., Bo, H., Hong, W. and Xuee, W. (2012), "Investigation of attachment saddle point structure of 3-D steady separation in laminar juncture flow using PIV", J. Vis., 15(3), 241-252. https://doi.org/10.1007/s12650-012-0133-2
  13. Johnson, M.J., Ravindra, K. and Andres, R. (1994), "Comparative study of the elimination of the wing fuselage junction vortex by boundary layer suction and blowing", Proceedings of the 32nd Aerosace Science Meeting and Exhibition, Reno, NV. USA, January.
  14. Kairouz, K.A. and Rahai, H.R. (2005), "Turbulent junction flow with an upstream ribbed surface", Int. J. Heat Fluid Fl., 26(5), 771-779. https://doi.org/10.1016/j.ijheatfluidflow.2005.02.002.
  15. Kang, K.J., Kim, T. and Song, S.J. (2009), "Strengths of horseshoe vortices around a circular cylinder with an upstream cavity", J. Mech. Sci. Tech., 23(7),1773-1778. https://doi.org/10.1007/s12206-009-0602-2
  16. Kubendran, L.R. and Harvey, W.D. (1985), "Juncture flow control using leading edge fillets", Proceedings of the AIAA 3rd Applied Aerodynamics Conference, Colorado springs, Colorado, USA, October.
  17. Kumar, K.N. and Govardhan, M. (2011), "Secondary flow loss reduction in a turbine cascade with a linearly varied height streamwise endwall fence", Int. J. Rot. Mach., 1-16. http://dx.doi.org/10.1155/2011/352819.
  18. Liu, J.H. and Song, C.Y. (2017), "Efficient suction control of unsteadiness of turbulent wing-plate junction flows", J. Hydrodyn., 29(2), 353-360. https://doi.org/10.1016/S1001-6058(16)60745-X.
  19. Liu, Z.H., Xiong, Y., and Cheng, X.T.U. (2014), "The method to control the submarine horseshoe vortex by breaking the vortex core", J. Hydrodyn., 26(4), 637-645. https://doi.org/10.1016/S1001-6058(14)60070-6
  20. Liu, Z.H., Xiong, Y., Wang, Z.Z. and Wang, S. (2010), "Numerical simulation and experimental study of the new method of horseshoe vortex control", J. Hydrodyn., 22(4), 572-581. https://doi.org/10.1016/S1001-6058(09)60090-1.
  21. Mohamed Gad-el-hak (2006), Flow Control Passive, Active, and Reactive Flow Management, Cambridge University Press, Cambridge, UK.
  22. Munson, B.R., Young, D.F. and Okiishi, T.H. (2009), Fundamentals of Fluid Mechanics, Wiley India, New Dehli, Dehli, India.
  23. Olcmen, S.M. and Simpson, R.L. (1994), "Influence of Wing shapes on surface pressure fluctuations at wing body junctions", AIAA J., 32(1), 6-15. https://doi.org/10.2514/3.48283.
  24. l men, S.M. and Simpson, R.L. (2007), "Influence of passive flow-control devices on the pressure fluctuations at wing-body junction flows", J. Fluid. Eng. -T ASME, 129(8), 1030-1037. https://doi.org/10.1115/1.2746917
  25. Oudheusden, B.W.V., Steenaert, C.B. and Boermans, L.M.M. (2004), "Attachment-line approach for design of a wing-body leading-edge fairing", J. Aircraft, 41(2), 238-246. https://doi.org/10.2514/1.353.
  26. Philips, D.B., Cimbala, J.M. and Treaster, A.L. (1992), "Suppression of the wing body junction vortex by body surface suction", J. Aircraft, 29(1), 118-122. https://doi.org/10.2514/3.46134.
  27. Seal, C.V. and Smith, C.R. (1999), "The control of turbulent end-wall boundary layers using surface suction", Exp. Fluids, 27(6), 484-496. https://doi.org/10.1007/s003480050373
  28. Theberge, M.A. and Ekmekci, A. (2017), "Effects of an upsream triangular plate on the wing-body junction flow", Phys. Fluids, 29, 097105. https://doi.org/10.1063/1.5000733.
  29. Wang, J.M., Bi, W.T. and Wei, Q.D. (2009), "Effects of an upstream inclined rod on the circular cylinder flat plate junction flow", Exp. Fluids, 46(6), 1093-1104. https://doi.org/10.1007/s00348-009-0619-4
  30. Wang, J.M., Liu, W., Xu, Z.H., Ai, Y.T. and Wang, C.J. (2011), "Study on the control of the wing body juncture horseshoe vortex utilizing venturi tube", J. Aero. Power, 26(11), 2617-2622.
  31. Wei, Q.D., Wang, J.M., Chen, G., Lu, Z.B. and Bi, W.T. (2008), "Modification of junction flows by altering the section shapes of the cylinders", J. Vis., 11(2), 115-124. https://doi.org/10.1007/BF03181926
  32. Younis, M.Y., Zhang, H., Hu, B. and Mehmood, S. (2014), "Topological evolution of laminar juncture flows under various critical parameters", Sci. China Tech. Sci., 57(7), 1342-1351. https://doi.org/10.1007/s11431-014-5587-0
  33. Younis, M.Y., Zhang, H., Oo, Z.Z., Muhammad, Z. and Bo, H., (2010), "Control of Juncture flows", Proceedings of The Asia Pecific International Symposium on Aerospace Technology, Xian, China, September.
  34. Zess, G.A. and Thole, K.A. (2002), "Computational design and experimental evaluation of using a leading edge fillet on a gas turbine vane", J. Turbomach., 124(2), 167-175. https://doi.org/10.1115/1.1460914