International Research Journal of Innovations in Engineering and Technology - IRJIET International Open Access, Monthly, Peer Reviewed, Reputed Journal ISSN (online): 2581-3048

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DOI Prefix: 10.47001/IRJIET

Numerical Analysis of the Effect of Free-stream Turbulence on Aerodynamic Performance of NACA 4415 Wind Turbine Airfoil

Nazaruddin SinagaDepartment of Mechanical Engineering, Faculty of Engineering, Diponegoro University, Jalan Prof. Soedarto, Tembalang, Semarang 50275, Central Jawa, IndonesiaSukimanSTIMA IMMI, Jalan Raya Tanjung Barat, Jakarta Selatan, Indonesia

Vol 6 No 9 (2022): Volume 6, Issue 9, September 2022 | Pages: 18-26

International Research Journal of Innovations in Engineering and Technology

OPEN ACCESS | Research Article | Published Date: 12-09-2022

doi Logo doi.org/10.47001/IRJIET/2022.609003

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Abstract

The wind turbine airfoil's aerodynamic performance aerodynamics become essential for the wind turbine. This study aimed to obtain the effect of free-stream turbulence intensity of wind turbine airfoil NACA 4415 using a 2D numerical method. Here, the turbulence intensity varied from 0.1% to 10% at Reynolds number 216,000 and by changing the angle of attack from -4 to 24 degrees, having a chord length of 0.153 m. The finite volume method was used in this study. It was found that the free-stream turbulence intensity can reduce the values ​​of CD, CL, CP, and CL/CD but has insignificant effects on the wake area behind the airfoil. The decrease in airfoil efficiency observed was caused by the boundary layer flow disruption, which reduced the total pressure coefficient on the airfoil surface. Likewise, the intensity of turbulence can reduce boundary layer thickness. Finally, the free-stream turbulence controls airfoil performance.

Keywords

Airfoil, Free-stream turbulence, NACA 4415, Numerical analysis, Wind turbine


Citation of this Article

Nazaruddin Sinaga, Sukiman, “Numerical Analysis of the Effect of Free-stream Turbulence on Aerodynamic Performance of NACA 4415 Wind Turbine Airfoil” Published in International Research Journal of Innovations in Engineering and Technology - IRJIET, Volume 6, Issue 9, pp 18-26, September 2022. Article DOI https://doi.org/10.47001/IRJIET/2022.609003

Licence Copyright (c) 2026 International Research Journal of Innovations in Engineering and Technology creative common licence This work is licensed under Creative common Attribution Non Commercial 4.0 Internation Licence
References
  1. Annual Energy Outlook 2019 with Projection to 2050, U.S. Energy Information Administration, Office of Energy Analysis, U.S. Dept. of Energy, 2019.
  2. Bavin, L.B., Israt, M.I., Harun, C.I., Alam, F., “Effect of turbulence on a Savonius type micro wind turbine,” Energy Procedia. 110, 549-554, 2017.
  3. Ren, G., Liu, J., Wan, J., Li, F., Guo, Y., Yu, D., “The analysis of turbulence intensity based on wind speed data in onshore wind farms,” Renew. Energy. 123, 756-766, 2018.
  4. Bardal, L.M., Saetran, L.R., “Influence of turbulence intensity on wind turbine power curves,” Energy Procedia. 137, 553-558, 2017.
  5. Cao, N., “Effects of turbulence intensity and integral length scale on an asymmetric airfoil at low Reynolds numbers,” Thesis submitted to University of Windsor, 2010.
  6. Colman, J., Di, L.J.M., Delnero, J.S., Martínez, M., Boldes, U., Bacchi, F., “Lift and drag coefficients behavior at low Reynolds number in an airfoil with gurney flap submitted to a turbulent flow: Part 1,” Lat. Am. Appl. Res., 38, 195-200, 2008.
  7. Maldonado, V., Castillo, L., Thormann, A., Meneveau, C., “The role of free stream turbulence with large integral scale on the aerodynamic performance of an experimental low Reynolds number S809 wind turbine blade,” J. Wind Eng. Ind. Aerodyn., 142, 246-257, 2015.
  8. Amandolese, X., Szechenyi, E., “Experimental study of the effect of turbulence on a section model blade oscillating in a stall,” Wind Energy, 7, 267-282, 2004.
  9. Kim, Y., Xie, Z.T., “Modelling the effect of free-stream turbulence on dynamic stall of wind turbine blades,” Comput. Fluids. 129, 53-66, 2016.
  10. Li, S., Wang, S., Wang, J., Mi, J., “Effect of turbulence intensity on airfoil flow: numerical simulations and experimental measurements,” Appl. Math. Mech-Engl., 32, 1029-1038, 2011.
  11. Yao, J., Yuan, W., Wang, J., Xie, J., Zhou, H., Peng, M., Sun, Y., “Numerical simulation of aerodynamic performance for two-dimensional wind turbine airfoils,” Procedia Eng., 31, 80-86, 2012.
  12. Aftab, S.M.A, Rafie, A.S.M, Razak, N.A., Ahmad, K.A., “Turbulence model selection for low Reynolds number flows,” PLoS One. 11, e0153755, 2016.
  13. Jacob, E.N., Ward, K.E., Pinkerton, R.M., “The characteristics of 78 related airfoil sections from tests in the variable-density wind-tunnel,” Report Number 460 National Advisory Committee for Aeronautics (Langley Memorial Aeronautical Laboratory), 1933.
  14. Mikkelsen, K., “Effect of free-stream turbulence on wind turbine performance,” Master thesis, Norwegian University of Science and Technology, Department of Energy and Process Engineering, Tornheim, 2013.
  15. Mukesh, R., Lingadurai, K., Selvakumar, U., “Airfoil shape optimization using non-traditional optimization technique and its validation,” J. King Saud Univ. - Eng. Sci., 26, 191-197, 2014.
  16. Ghazi, M.A., Olwi, I.A., Interference effects of a large wing on the performance of a trailing wing, J. King Saud Univ. – Eng. Sci., 1, 77-92, 1995.
  17. Abu-Hijleh, B.A.K, “Reattachment of turbulent shear layer over a backwards-facing step with isotropic porous floor segments,” J. King Saud Univ. - Eng. Sci., 11, 117-129, 1999.
  18. Daniels, S.J., Castro, I.P., Xie, Z.T., “Numerical analysis of free-stream turbulence effects on the vortex-induced vibrations of a rectangular cylinder,” J. Wind Eng. Ind. Aerodyn., 153, 13-25, 2016.
  19. Jubran, B.A., Hamdan, M.N., “Effects of secondary injection on the cross flow-induced vibration of a single cylinder,” J. King Saud Univ. - Eng. Sci., 3, 233-248, 1991.
  20. Aarnesa, J.R., Andersson, H.I., Haugen, N.E.L., “Numerical investigation of free-stream turbulence effects on the transition-in-wake state of flow past a circular cylinder,” J. Turbul., 19, 252-273, 2018.
  21. Wekesa, D.W., Wang, C.W., Wei, Y., Zhu, W., “Experimental and numerical study of turbulence effect on aerodynamic performance of a small-scale vertical axis wind turbine,” J. Wind Eng. Ind. Aerodyn., 157, 1-14, 2016
  22. Ismail, O.S., Umukoro, G.E., “Modelling combustion reactions for gas flaring and its resulting emissions,” J. King Saud Univ. – Eng. Sci., 28, 130-140, 2016.

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