DOI QR코드

DOI QR Code

Investigation of crossflow features of a slender delta wing

  • Tasci, Mehmet O. (Department of Mechanical Engineering, Cukurova University) ;
  • Karasu, Ilyas (Department of Aerospace Engineering, Adana Alparslan Turkes Science and Technology University) ;
  • Sahin, Besir (Department of Mechanical Engineering, Cukurova University) ;
  • Akilli, Huseyin (Department of Mechanical Engineering, Cukurova University)
  • 투고 : 2019.05.31
  • 심사 : 2020.08.11
  • 발행 : 2020.09.25

초록

In the present work, the main features of primary vortices and the vorticity concentrations downstream of vortex bursting in crossflow plane of a delta wing with a sweep angle of Λ=70° were investigated under the variation of the sideslip angles, β. For the pre-review of flow structures, dye visualization was conducted. In connection with a qualitative observation, a quantitative flow analysis was performed by employing Particle Image Velocimetry (PIV). The sideslip angles, β were varied with four different angles, such as 0°, 4°, 12°, and 20° while angles of attack, α were altered between 25° and 35°. This study mainly focused on the instantaneous flow features sequentially located at different crossflow planes such as x/C=0.6, 0.8 and 1.0. As a summary, time-averaged and instantaneous non-uniformity of turbulent flow structures are altered considerably resulting in non-homogeneous delta wing surface loading as a function of the sideslip angle. The vortex bursting location on the windward side of the delta wing advances towards the leading-edge point of the delta wing. The trajectory of the primary vortex on the leeward side slides towards sideways along the span of the delta wing. Besides, the uniformity of the lift coefficient, CL over the delta wing plane was severely affected due to unbalanced distribution of buffet loading over the same plane caused by the variation of the sideslip angle, β. Consequently, dissimilarities of the leading-edge vortices result in deterioration of the mean value of the lift coefficient, CL.

키워드

과제정보

The research described in this paper was financially supported by the Scientific and Technological Research Council (TUBITAK) of Turkey under contract no: 114M497. Additional financial support was also received from the Scientific Research Project Office of Ç ukurova University under contract no: FYL-2016-5845.

참고문헌

  1. Canpolat, C., Yayla, S., Sahin, B. and Akilli, H. (2009), "Dye visualization of the flow structure over a yawed nonslender delta wing", J. Aircraft, 46, 1818-1822. https://doi.org/10.2514/1.45274.
  2. Canpolat, C., Yayla, S., Sahin, B. and Akilli, H. (2012), "Observation of the vortical flow over a yawed delta wing", J. Aerosp. Eng., 25(4), 613-626. https://doi.org/10.1061/(ASCE)AS.1943-5525.0000163.
  3. Chen, M., Liu, P., Guo, H. and Qu, Q. (2015), "Effect of sideslip on high-angle-of-attack vortex flow over close-coupled canard configuration", J. Aircraft, 53, 217-230. https://doi.org/10.2514/1.C033305.
  4. Delery, J.M. (1994), "Aspects of vortex breakdown", Progress Aerosp. Sci., 30, 1-59. https://doi.org/10.1016/0376-0421(94)90002-7.
  5. Erickson, G., Schreiner, J. and Rogers, L. (1989), "On the structure, interaction, and breakdown characteristics of slender wing vortices at subsonic, transonic, and supersonic speeds", In 16th Atmospheric Flight Mechanics Conference.
  6. Ericsson, L.E. (1992), "Sources of high alpha vortex asymmetry at zero sideslip", J. Aircraft, 29(6), 1086-1090. https://doi.org/10.2514/3.56864
  7. Escudier, M. (1988), "Vortex breakdown: Observations and explanations", Progress Aerosp. Sci., 25, 189-229. https://doi.org/10.1016/0376-0421(88)90007-3.
  8. Gursul, I. and Wang, Z. (2018), "Flow control of tip/edge vortices", AIAA J., 56(5), 1731-1749. https://doi.org/10.2514/1.J056586.
  9. Gursul, I., Gordnier, R. and Visbal, M. (2005), "Unsteady aerodynamics of nonslender delta wings", Progress Aerosp. Sci., 41, 515-557. https://doi.org/10.1016/j.paerosci.2005.09.002
  10. Hall, M.G. (1972), "Vortex breakdown", Annu. Rev. Fluid Mech., 4(1), 195-218. https://doi.org/10.1146/annurev.fl.04.010172.001211.
  11. Johnson, Jr., Joseph, L., Grafton, S.B. and Long, P. (1980), "Exploratory investigation of the effects of vortex bursting on the high angle-of-attack lateral-directional stability characteristics of highly-swept wings.", A Collection of Technical Papers, AIAA 11th Aerodynamic Testing Conference, Colorada, March.
  12. Karasu, I., Sahin, B., Akilli, H. and Canpolat, C. (2015), "Dye visualization of a yawed slender delta wing", J. Therm. Eng., 1(2), 646-654.
  13. Ke, S.T., Zhu, P. and Ge, Y.J. (2019), "Effects of different wind deflectors on wind loads for extra-large cooling towers", Wind Struct., 28(5), 299-313. https://doi.org/10.12989/was.2019.28.5.299.
  14. Lee, M. and Ho, C.M. (1990), "Lift force of delta wings", Appl. Mech. Rev., 43(9), 209-221. https://doi.org/10.1115/1.3119169.
  15. Lu, Z.Y. and Zhu, L.G. (2004), "Study on forms of vortex breakdown over Delta Wing", Chinese J. Aeronaut., 17, 13-16. https://doi.org/10.1016/S1000-9361(11)60196-9.
  16. Lucca-Negro, O. and O'Doherty (2001), "Vortex bursting: A review", Progress Energy Combustion Sci., 27(4), 431-481. https://doi.org/10.1016/S0360-1285(00)00022-8
  17. Meng, X., Liu, F. and Luo, S. (2018), "Effect of low dorsal fin on the breakdown of vortices over a slender delta wing", Aerosp. Sci. Technol., 81, 316-321. https://doi.org/10.1016/j.ast.2018.08.017.
  18. Menke, M., Yang, H. and Gursul, I. (1996), "Further experiments on fluctuations of vortex breakdown location", The 34th Aerospace Sciences Meeting and Exhibit. https://doi.org/10.2514/6.1996-205.
  19. Nelson, R.C. and Pelletier, A. (2003), "The unsteady aerodynamics of slender wings and aircraft undergoing large amplitude maneuvers", Progress Aerosp. Sci., 39(2-3), 185-248. https://doi.org/10.1016/S0376-0421(02)00088-X.
  20. Ozgoren, M., Sahin, B. and Rockwell, D. (2002), "Vortex structure on a Delta Wing at high angle of attack", AIAA J., 40, 285-292. https://doi.org/10.2514/2.1644.
  21. Ozturk, N.A., Akkoca, A. and Sahin, B. (2008), "PIV measurements of flow past a confined cylinder", Experiments Fluids, 44(6), 1001-1014. https://doi.org/10.1007/s00348-007-0459-z.
  22. Payne, F.M. and Nelson, R.C. (1986), "Experimental investigation of vortex bursting on a Delta Wing", NASA Technical Report, Report No. N86-27196.
  23. Sahin, B., Akilli, H., Lin, J.C. and Rockwell, D. (2001), "Vortex breakdown-edge interaction: consequence of edge oscillations", AIAA J., 39, 865-876. https://doi.org/10.2514/2.1390.
  24. Sahin, B., Yayla, S., Canpolat, C. and Akilli, H. (2012), "Flow structure over the yawed nonslender diamond wing", Aerosp Sci Technol, 23, 108-119. https://doi.org/10.1016/j.ast.2011.06.008.
  25. Shields, M. and Mohseni, K. (2012), "Effects of sideslip on the aerodynamics of low-aspect-ratio low-Reynolds-number wings", AIAA J., 50(1), 85-99. https://doi.org/10.2514/1.J051151.
  26. Soloff, S.M. and Meinhart, C.D. (1999), CLEANVEC: PIV Vector Validation Software. Available from the Laboratory for Turbulence and Complex Flow at the University of Illinois, U.S.A.
  27. Sun, H. and Ye, J. (2016), "3-D characteristics of conical vortex around large-span flat roof by PIV technique", Wind Struct., 22(6), 663-684. https://doi.org/10.12989/was.2016.22.6.663.
  28. Taylor, G.S. and Gursul, I. (2004), "Buffeting flows over a lowsweep delta wing", AIAA J., 42(9), 1737-1745. https://doi.org/10.2514/1.5391.
  29. Verhagen, N. (2000), "Effect of Sideslip on the Flow over a 65-deg Delta Wing", In the 38th Aerospace Sciences Meeting and Exhibit.
  30. Verhagen, N.G. and Jobe, C.E. (2003), "Wind-tunnel study on a 65-deg Delta Wing at sideslip", J. Aircraft, 40, 290-296. https://doi.org/10.2514/2.3092.
  31. Wentz, Jr., W.H. and Kohlman, D.L. (1971), "Vortex breakdown on slender sharp-edged wings", J. Aircraft, 8(3), 156-161. https://doi.org/10.2514/3.44247.
  32. Williamson, C.H.K. and Govardhan, R. (2004), "Vortex-induced vibrations", Annu. Rev. Fluid Mech., 36, 413-455. https://doi.org/10.1146/annurev.fluid.36.050802.122128.
  33. Yaniktepe, B. and Rockwell, D. (2004), "Flow structure on a Delta Wing of low sweep angle", AIAA J., 42(3), 513-523. https://doi.org/10.2514/1.1207.
  34. Yaniktepe, B. and Rockwell, D. (2005), "Flow structure on diamond and lambda planforms: trailing-edge region", AIAA J., 43(7), 1490-1500. https://doi.org/10.2514/1.7618.
  35. Yayla, S., Canpolat, C . Sahin, B. and Akilli, H. (2010), "Yaw angle effect on flow structure over the nonslender diamond wing", AIAA J., 48(10), 2457-2461. https://doi.org/10.2514/1.J050380.
  36. Yayla, S., Canpolat, C., Sahin, B. and Akilli, H. (2013), "The effect of angle of attack on the flow structure over the nonslender lambda wing", Aerosp. Sci. Technol., 28(1), 417-430. https://doi.org/10.1016/j.ast.2012.12.007.
  37. Ye, J. and Dong, X. (2014), "Improvement and validation of a flow model for conical vortices", Wind Struct., 19(2), 113-144. https://doi.org/10.12989/was.2014.19.2.113.
  38. Zharfa, M., Ozturk, I. and Yavuz, M.M. (2016), "Flow structure on Nonslender delta wing: Reynolds number dependence and flow control", AIAA J., Vol. 54(3), 880-897. https://doi.org/10.2514/1.J054495.

피인용 문헌

  1. Comparison of aerodynamic performances of various airfoils from different airfoil families using CFD vol.32, pp.3, 2020, https://doi.org/10.12989/was.2021.32.3.239
  2. Near-surface particle image velocimetry measurements over a yawed slender delta wing vol.235, pp.16, 2020, https://doi.org/10.1177/0954410021999556