Experimental and Numerical Study of a Supercritical Wing Performance at Low Reynolds Numbers Equipped with Different Winglet Planforms

Document Type : Research Article


1 Department of Aerospace Engineering, Amirkabir University of Technology, Tehran, Iran

2 Department of Mechanical Engineering, Polytechnic of Milan, Milan, Italy


In the era of rapid technological developments, the green aircraft and winglets of airplanes play a crucial role in reducing fuel consumption and its ensuing pollution. In this regard, the novelty of this paper is to focus on investigating the effect of the different geometrical parameters of winglets planforms on improving the aerodynamic performance of a wing with a supercritical airfoil (NACA 641412) at lower Reynolds numbers (take-off and landing phase). These investigations were 
conducted experimentally in a wind tunnel by force measurements through an external force balance. The aerodynamic coefficients of CL and CL/CD were obtained for the clean wing and nine various winglet planforms at a wide range of angles of attack from -4° to 20° and Reynolds numbers from Re=0.99×105 to Re=1.98×105. Furthermore, to get better insight into the physics of the flow, the numerical simulation of specific cases was carried out. According to the force measurement and vorticity magnitude results, among single winglets of W1, W2, W3, and W4, the W1 winglet with vertical height and linear side showed a better performance in all Reynolds numbers with a maximum lift increment of 26%; also, the W7 winglet planform represented the best performance as in double winglets with a maximum lift-todrag ratio increment of 40%.


Main Subjects

  1. P. Eguea, G.P.G. da Silva, F.M. Catalano, Fuel efficiency improvement on a business jet using a camber morphing winglet concept, Aerospace Science and Technology, 96 (2020) 105542.
  2. A. Hasan, A.A. Mamun, S.M. Rahman, K. Malik, M.I.U. Al Amran, A.N. Khondaker, O. Reshi, S.P. Tiwari, F.S. Alismail, Climate change mitigation pathways for the aviation sector, Sustainability, 13(7) (2021) 3656.
  3. M. Bushnell, Aircraft drag reduction—a review, Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 217(1) (2003) 1-18.
  4. Spillman, Wing tip sails; progress to date and future developments, The Aeronautical Journal, 91(910) (1987) 445-453.
  5. T. Whitcomb, A design approach and selected wind tunnel results at high subsonic speeds for wing-tip mounted winglets, 1976.
  6. D. Maughmer, T.S. Swan, S.M. Willits, Design and testing of a winglet airfoil for low-speed aircraft, Journal of Aircraft, 39(4) (2002) 654-661.
  7. Hossain, A. Rahman, A. Iqbal, M. Ariffin, M. Mazian, Drag analysis of an aircraft wing model with and without bird feather like winglet, International Journal of Aerospace and Mechanical Engineering, 6(1) (2012) 8-13.
  8. Kolappan, I.N. Manickam, K.R.J. Swikker, S.J.P. Gnanaraj, M. Appadurai, Performance analysis of aircraft composite winglet, Materials Today: Proceedings, 62 (2022) 889-895.
  9. T. Lewthwaite, C.V. Amaechi, Numerical investigation of winglet aerodynamics and dimple effect of NACA 0017 airfoil for a freight aircraft, Inventions, 7(1) (2022) 31.
  10. Seshaiah, B. Vasu, K.V.K. Reddy, P. Bridjesh, Analysis on air craft winglet at different angles by using CFD simulation, Materials today: Proceedings, 49 (2022) 275-283.
  11. Smith, N. Komerath, R. Ames, O. Wong, J. Pearson, Performance analysis of a wing with multiple winglets, in: 19th AIAA Applied Aerodynamics Conference, 2001, pp. 2407.
  12. P.L.G.M. Barrios, G.M.P. Herman, Reducing drag by modifying the winglet design, The Philippine Physics Society Physics Fair, Cebu. ResearchGate, (2017).
  13. Mousazadeh, M. Shahmardan, T. Tavangar, K. Hosseinzadeh, D. Ganji, Numerical investigation on convective heat transfer over two heated wall-mounted cubes in tandem and staggered arrangement, Theoretical and Applied Mechanics Letters, 8(3) (2018) 171-183.
  14. Mattos, A. Macedo, D. Silva Filho, Considerations about winglet design, in: 21st AIAA applied aerodynamics conference, 2003, pp. 3502.
  15. A. Al Sidairi, G. Rameshkumar, Design of winglet device for aircraft, International Journal of Multidisciplinary Sciences and Engineering, 7(1) (2016).
  16. Narayan, B. John, Effect of winglets induced tip vortex structure on the performance of subsonic wings, Aerospace Science and Technology, 58 (2016) 328-340.
  17. Helal, E.E. Khalil, O.E. Abdellatif, G.M. Elhariry, Aerodynamic Analyses of Aircraft-Blended Winglet Performance, IOSR J. Mech. Civ. Eng. Ver, 13(3) (2016) 2320-2334.
  18. Cosin, F.M. Catalano, L.G.N. Correa, R.M.U. Entz, Aerodynamic analysis of multi-winglets for low speed aircraft, in: 27th International congress of the aeronautical sciences, 2010, pp. 1622-1631.
  19. A. Azlin, C.M. Taib, S. Kasolang, F. Muhammad, CFD analysis of winglets at low subsonic flow, in: Proceedings of the World Congress on Engineering, 2011, pp. 6-8.
  20. Rajendran, Design of Parametric Winglets and Wing tip devices: A conceptual design approach, in, 2012.
  21. Nandi, M. Assad-Uz-Zaman, M.F. Rabbi, M. Mashud, Experimental Investigation of an Aircraft Wing Model Using Slotted Winglet, in, IEEE, 2014.
  22. Mostafa, S. Bose, A. Nair, M.A. Raheem, T. Majeed, A. Mohammed, Y. Kim, A parametric investigation of non-circular spiroid winglets, in: EPJ Web of Conferences, EDP Sciences, 2014, pp. 02077.
  23. Pragati, S. Baskar, Aerodynamic analysis of blended winglet for low speed aircraft, in: Proceedings of the World Congress on Engineering, 2015.
  24. N. Gavrilović, B.P. Rašuo, G.S. Dulikravich, V.B. Parezanović, Commercial aircraft performance improvement using winglets, FME Transactions, 43(1) (2015) 1-8.
  25. Dimino, G. Andreutti, F. Moens, F. Fonte, R. Pecora, A. Concilio, Integrated design of a morphing winglet for active load control and alleviation of turboprop regional aircraft, Applied Sciences, 11(5) (2021) 2439.
  26. Zhong, W. Wu, S. Han, Research progress of tip winglet technology in compressor, Journal of Thermal Science, 30 (2021) 18-31.
  27. C. Montoya, S.G. Flechner, P.F. Jacobs, Effect of an alternate winglet on the pressure and spanwise load distributions of a first generation jet transport wing, 1978.
  28. B. MNVS, S.K.G. Kalali, B.N. Goud, A.S. Kumar, M.S. Gupta, Flow investigation of a multiple winglet wing model, in: AIP Conference Proceedings, AIP Publishing, 2023.
  29. Takenaka, K. Hatanaka, W. Yamazaki, K. Nakahashi, Multidisciplinary design exploration for a winglet, Journal of aircraft, 45(5) (2008) 1601-1611.
  30. Masud, Z. Toor, Z. Abbas, U. Ahsun, Part I: Uncertainty analysis of various design parameters on winglet performance, in: 54th AIAA Aerospace Sciences Meeting, 2016, pp. 0556.
  31. H. Sohn, J.W. Chang, Visualization and PIV study of wing-tip vortices for three different tip configurations, Aerospace Science and Technology, 16(1) (2012) 40-46.
  32. Ilie, M. White, V. Soloiu, M. Rahman, The effect of winglets on the aircraft wing aerodynamics; numerical studies using LES, in: AIAA Scitech 2019 Forum, 2019, pp. 1308.
  33. G. Mourad, I. Shahin, S.S. Ayad, O.E. Abdellatif, T.A. Mekhail, Effect of winglet geometry on horizontal axis wind turbine performance, Engineering reports, 2(1) (2020) e12101.
  34. J. Martinez Lara, D. Angland, The Use of Porous Meshes to Reduce Landing Gear Wake-Flap Interaction Noise, in: 28th AIAA/CEAS Aeroacoustics 2022 Conference, 2022, pp. 3044.
  35. R. Menter, Two-equation eddy-viscosity turbulence models for engineering applications, AIAA journal, 32(8) (1994) 1598-1605.
  36. Nelson, The trailing vortex wake hazard: Beyond the takeoff and landing corridors, in: AIAA Atmospheric Flight Mechanics Conference and Exhibit, 2004, pp. 5171.