skip to main content

Aerodynamic analysis of backward swept in HAWT rotor blades using CFD

1Department of Energy Engineering, Sharif University of Technology, P.O. Box 14565-114, Tehran, Iran, Islamic Republic of

2Department of Aerospace Engineering, Sharif University of Technology, P.O. Box 11155-11365, Tehran, Iran, Islamic Republic of

Published: 15 Dec 2018.
Editor(s): H. Hadiyanto

Citation Format:
Abstract

The aerodynamical design of backward swept for a horizontal axis wind turbine blade has been carried out to produce more power at higher wind velocities. The backward sweep is added by tilting the blade toward the air flow direction. Computational Fluid Dynamics (CFD) calculations were used for solving the conservation equations in one outer stationary reference frame and one inner rotating reference frame, where the blades and grids were fixed in reference to the rotating frame. The blade structure was validated using Reynolds Averaged Navier-Stokes (RANS) solver in a test case by the National Renewable Energy Laboratory (NREL) VI blades results. Simulation results show considerable agreement with the NREL measurements. Standard K-ε turbulence model was chosen for simulations and for the backward swept design process. A sample backward sweep design was applied to the blades of a Horizontal Axis Wind Turbine (HAWT) rotor, and it is obtained that although at the lower wind velocities the output power and the axial thrust of the rotor decrease, at the higher wind velocities the output power increases while the axial thrust decreases. The swept blades have shown about 30 percent increase in output power and about 12 percent decrease in thrust at the wind speed of 14 m/s.

Article History: Received June 23rd 2018; Received in revised form Sept 16th 2018; Accepted October 1st 2018; Available online

How to Cite This Article: Salari, M.S., Boushehri, B.Z. and Boroushaki, M. (2018). Aerodynamic Analysis of Backward Swept in HAWT Rotor Blades Using CFD. International Journal of Renewable Energy Development, 7(3), 241-249.

http://dx.doi.org/10.14710/ijred.7.3.241-249

Fulltext View|Download
Keywords: Horizontal Axis Wind Turbine; CFD; Backward Sweep;Wind Turbine Efficiency;Blade shape Optimization

Article Metrics:

  1. AbdelSalam, A. M., Ramalingam, V., (2014) Wake prediction of horizontal-axis wind turbine using full-rotor modeling, J. Wind Eng. Ind. Aerodyn., vol. 124, pp. 7–19
  2. Balduzzi, F., Bianchini, A., Maleci, R., Ferrara, G., Ferrari, L. (2016) Critical issues in the CFD simulation of Darrieus wind turbines,” Renew. Energy, vol. 85, pp. 419–435
  3. Betz, A. (2014) Introduction to the theory of flow machines, Pergamon Press
  4. Cao, L., Ji, Y., Wang, Z., Yuan, W. (2012) Analysis on the influence of rotational speed to aerodynamic performance of vertical axis wind turbine, Procedia Eng., vol. 31, pp. 245–250
  5. Chattot,, J. J. (2009) Effects of blade tip modifications on wind turbine performance using vortex model, Comput. Fluids, vol. 38, no. 7, pp. 1405–1410
  6. Elfarra , M. A., (2011) Horizontal Axis Wind Turbine Rotor Blade: Winglet and Twist Aerodynamic Design and Optimization Using CFD, Middle East Technical University
  7. El-Wakil , M. M. (1984) Power plant Technology. McGraw-Hill International
  8. Farrugia, R., Sant,T., Micallef, D. (2016) A study on the aerodynamics of a floating wind turbine rotor, Renew. Energy, vol. 86, pp. 770–784
  9. Gaunaa, M., Johansen, J. (2007) Determination of the maximum aerodynamic efficiency of wind turbine rotors with winglets, Journal of Physics: Conference Series, Vol. 75, p. 012006
  10. Giguere, P., Selig, M. S. (1999) Design of a tapered and twisted blade for the NREL combined experiment rotor, NREL/SR, vol. 500, p. 26173
  11. Janajreh, I., Qudaih, R., Talab,, I., Ghenai, C. (2010) Aerodynamic flow simulation of wind turbine: downwind versus upwind configuration,” Energy Convers. Manag., vol. 51, no. 8, pp. 1656–1663
  12. Jeon, M., Lee, S. (2014) Unsteady aerodynamics of offshore floating wind turbines in platform pitching motion using vortex lattice method, Renew. Energy, vol. 65, pp. 207–212
  13. Li, Y., Paik, K. J., Xing, T., Carrica, P. M. (2012) Dynamic overset CFD simulations of wind turbine aerodynamics,” Renew. Energy, vol. 37, no. 1, pp. 285–298
  14. Make, M., Vaz, G. (2015) Analyzing scaling effects on offshore wind turbines using CFD, Renew. Energy, vol. 83, pp. 1326–1340
  15. Mohamed, M. H., Ali, A. M., Hafiz, A. A. (2015) CFD analysis for H-rotor Darrieus turbine as a low speed wind energy converter, Eng. Sci. Technol. Int. J., vol. 18, no. 1, pp. 1–13
  16. Subramanian, B., Chokani, N., Abhari, R. S. (2016) Aerodynamics of wind turbine wakes in flat and complex terrains, Renew. Energy, vol. 85, pp. 454–463
  17. Sedaghat, A., Assad, M. E. H., Gaith, M. (2014) Aerodynamics performance of continuously variable speed horizontal axis wind turbine with optimal blades, Energy, vol. 77, pp. 752–759

Last update:

  1. A Brief Study on the Implementation of Helical Cross-Flow Hydrokinetic Turbines for Small Scale Power Generation in the Indian SHP Sector

    Jayaram Vijayan, Bavanish Balac Retnam. International Journal of Renewable Energy Development, 11 (3), 2022. doi: 10.14710/ijred.2022.45249
  2. A CFD Based Application of Support Vector Regression to Determine the Optimum Smooth Twist for Wind Turbine Blades

    Mustafa Kaya. Sustainability, 11 (16), 2019. doi: 10.3390/su11164502

Last update: 2024-11-05 09:21:25

  1. A CFD Based Application of Support Vector Regression to Determine the Optimum Smooth Twist for Wind Turbine Blades

    Mustafa Kaya. Sustainability, 11 (16), 2019. doi: 10.3390/su11164502