Wind and Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Aerodynamic analysis of cambered blade H-Darrieus rotor in low wind velocity using CFD

  • Received : 2020.06.30
  • Accepted : 2021.12.08
  • Published : 2021.12.25
⟨ Previous Next ⟩

Abstract

This present paper leads to investigation of blade-fluid interactions of cambered blade H-Darrieus rotor having EN0005 airfoil blades using comprehensive Computational Fluid Dynamics (CFD) analysis to understand its performance in low wind streams. For several blade azimuthal angle positions, the effects of three different low wind speeds are studied regarding their influence on the blade-fluid interactions of the EN0005 blade rotor. In the prevailing studies by various researchers, such CFD analysis of H-Darrieus rotors are very less, hence it is needed to improve their steady-state performance in low wind velocities. Such a study is also important to obtain important performance insights of such thin cambered blade rotor in its complete rotational cycle. It has been seen that the vortex generated at the suction side of the EN0005 blade rolls back to its leading edge due to the camber of the blade and thus a peak velocity occurs near to the nose position of this blade at its leading edge, which leads to peak performance of this rotor. Again, in the returning phase of the blade, a secondary recirculating vortex is generated that acts on the pressure side of EN0005 blade rotor that increases the performance of this cambered EN0005 blade rotor in its downstream position as well. Here, the aerodynamic performances have been compared considering Standard k-ε and SST k-ω models to check the better suited turbulence model for the cambered EN0005 blade H-Darrieus rotor in low tip speed ratios.

Keywords

Acknowledgement

The authors are very thankful to the computational lab facility provided by NIT Silchar, Assam, India.

References

  1. Batista, N.C., Melicio, R., Mendes, V.M.F., Calderon, M. and Ramiro, A. (2015), "On a self-start Darrieus wind turbine: Blade design and field tests", Renew. Sustain. Energy Rev., 52, 508- 522. https://doi.org/10.1016/j.rser.2015.07.147.
  2. Beri, H. and Yao, Y. (2011), "Effect of camber airfoil on self starting of Vertical Axis Wind Turbine", J. Environ. Sci. Technol., 4(3), 302-312. https://doi.org/10.3923/jest.2011.302.312.
  3. Bhuyan, S. and Biswas, A. (2014), "Investigations on self-starting and performance characteristics of simple H and hybrid H-Savonius vertical axis wind rotors", Energy Convers. Manage., 87, 859-867. https://doi.org/10.1016/j.enconman.2014.07.056.
  4. Biswas, A. and Gupta, R. (2014), "Unsteady aerodynamics of a twist bladed H-Darrieus rotor in low Reynolds number flow", J. Renew. Sustain. Energy, 6(3), 033108. https://doi.org/10.1063/1.4878995.
  5. Chougule, P. and Nielsen, S.R. (2014), "Simulation of flow over double-element airfoil and wind tunnel test for use in vertical axis wind turbine", J. Phys.: Conference Series, 524(1), 012009. https://doi.org/10.1088/1742-6596/524/1/012009.
  6. Danao, L.A., Qin, N. and Howell, R. (2012), "A numerical study of blade thickness and camber effects on vertical axis wind turbines", Proc. Institute. Mech. Eng., Part A: J. Power Energy, 226(7), 867-881. https://doi.org/10.1177/0957650912454403.
  7. Daroczy, L., Janiga, G., Petrasch, K., Webner, M. and Thevenin, D. (2015), "Comparative analysis of turbulence models for the aerodynamic simulation of H-Darrieus rotors", Energy, 90, 680-690. http://dx.doi.org/10.1016/j.energy.2015.07.102.
  8. Deshpande, P. and Li, X. (2013), "Numerical study of giromill-type wind turbines with symmetrical and non-symmetrical airfoils", Euro. In. J. Sci. Techno., 2(8), 195-208.
  9. Sobhani, E., Ghaffari, M. and Maghrebi, M.J. (2017), "Numerical investigation of dimple effects on darrieus vertical axis wind turbine", Energy, 133, 231-241. https://doi.org/10.1016/j.energy.2017.05.105.
  10. Gupta, R. and Biswas, A. (2010), "Computational fluid dynamics analysis of a twisted three-bladed H-Darrieus rotor", J. Renew. Sustain. Energy, 2(4), 043111. https://doi.org/10.1063/1.3483487.
  11. Gupta, R., Roy, S. and Biswas, A. (2010), "Computational fluid dynamics analysis of a twisted airfoil shaped two-bladed H-Darrieus rotor made from fibreglass reinforced plastic (FRP)", Int. J. Energy Environ., 1(6), 953-968.
  12. Howell, R., Qin, N., Edwards, J. and Durrani, N. (2010), "Wind tunnel and numerical study of a small vertical axis wind turbine", Renew. Energy, 35(2), 412-422. https://doi.org/10.1016/j.renene.2009.07.025.
  13. Islam, M., Ting, D.S. and Fartaj, A. (2007), "Desirable airfoil features for smaller-capacity straight-bladed VAWT", Wind Eng., 31(3). 165-196. https://doi.org/10.1260/030952407781998800.
  14. Su, J., Chen, Y., Han, Z., Zhou, D., Bao, Y. and Zhao, Y. (2020), "Investigation of V-shaped blade for the performance improvement of vertical axis wind turbines", Appl. Energy, 260, 114326. https://doi.org/10.1016/j.apenergy.2019.114326.
  15. Jain, S. and Saha, U.K. (2020), "The state-of-the-art technology of H-type Darrieus wind turbine rotors", J. Energy Resour. Technol., 142(3). https://doi.org/10.1115/1.4044559.
  16. Kaminsky, C., Filush, A., Kasprzak, P. and Mokhtar, W. (2012), "A CFD study of wind turbine aerodynamics", In Proc. 2012 ASEE North Central Section Confer. 1-18. Ohio Northern University.
  17. Law, J.S.W. and Al-Obaidi, A.S.M. (2016), Numerical Analysis of the Effect of the Number of Round Dimples on the Aerodynamics Efficiency of NACA 0012 Airfoil.
  18. Li, X., Yang, K., Zhang, L., Bai, J. and Xu, J. (2014), "Large thickness airfoils with high lift in the operating range of angle of attack", J. Renew. Sustain. Energy, 6(3), 033110. https://doi.org/10.1063/1.4878846.
  19. Zamani, M., Nazari, S., Moshizi, S.A. and Maghrebi, M.J. (2016), "Three-dimensional simulation of J-shaped Darrieus vertical axis wind turbine", Energy, 116, 1243-1255. https://doi.org/10.1016/j.energy.2016.10.031
  20. Ismail, M.F. and Vijayaraghavan, K. (2015), "The effects of aerofoil profile modification on a vertical axis wind turbine performance", Energy, 80. 20-31. https://doi.org/10.1016/j.energy.2014.11.034.
  21. Ma, N., Lei, H., Han, Z., Zhou, D., Bao, Y., Zhang, K. and Chen, C. (2018), "Airfoil optimization to improve power performance of a high-solidity vertical axis wind turbine at a moderate tip speed ratio", Energy, 150, 236-252. https://doi.org/10.1016/j.energy.2018.02.115.
  22. Martinez, R., Urquiza, G., Castro, L., Garcia, J.C., Rodriguez, A., Pirin, O.T. and Herrera, U.C. (2021), "Shape effect of thickness of the NREL S815 profile on the Performance of the H-rotor Darrieus turbine", J. Renew. Sustain. Energy, 13(1), 013301. https://doi.org/10.1063/5.0015083.
  23. Mohamed, M.H., Dessoky, A. and Alqurashi, F. (2019), "Blade shape effect on the behavior of the H-rotor Darrieus wind turbine: Performance investigation and force analysis", Energy, 179(C), 1217-1234. https://doi.org/10.1016/j.energy.2019.05.069.
  24. Rezaeiha, A., Montazeri, H. and Blocken, B. (2018), "Towards accurate CFD simulations of vertical axis wind turbines at different tip speed ratios and solidities: Guidelines for azimuthal increment, domain size and convergence", Energy Convers. Manage., 156, 301-316. https://doi.org/10.1016/j.enconman.2017.11.026.
  25. Sengupta, A.R., Biswas, A. and Gupta, R. (2016), "Studies of some high solidity symmetrical and unsymmetrical blade H-Darrieus rotors with respect to starting characteristics, dynamic performances and flow physics in low wind streams", Renew. Energy, 93. 536-547. https://doi.org/10.1016/j.renene.2016.03.029.
  26. Sengupta, A.R., Biswas, A. and Gupta, R. (2017), "Investigations of H-Darrieus rotors for different blade parameters at low wind speeds",Wind Struct., 25(6), 551-567. https://doi.org/10.12989/was.2017.25.6.551.
  27. Sengupta, A.R., Biswas, A. and Gupta, R. (2017), "The aerodynamics of high solidity unsymmetrical and symmetrical blade H-Darrieus rotors in low wind speed conditions", J. Renew. Sustain. Energy, 9(4), 043307. https://doi.org/10.1063/1.4999965.
  28. Sengupta, A.R., Biswas, A. and Gupta, R. (2019), "Comparison of low wind speed aerodynamics of unsymmetrical blade H-Darrieus rotors-blade camber and curvature signatures for performance improvement", Renew. Energy, 139, 1412-1427. https://doi.org/10.1016/j.renene.2019.03.054.
  29. Sheldahl, R.E. and Klimas, P.C. (1981), "Aerodynamic characteristics of seven symmetrical airfoil sections through 180-degree angle of attack for use in aerodynamic analysis of vertical axis wind turbines", Sandia Nat. Lab., Albuquerque, NM (USA). https://doi.org/10.2172/6548367.
  30. Singh, M. A., Biswas, A. and Misra, R. D. (2015), "Investigation of self-starting and high rotor solidity on the performance of a three S1210 blade H-type Darrieus rotor", Renewable energy, 76, 381-387. https://doi.org/10.1016/j.renene.2014.11.027.
  31. Soh, Z.P. and Al-Obaidi, A.S.M. (2016), Numerical Analysis of the Shape of Dimple on the Aerodynamic Efficiency of NACA 0012 Airfoil.
  32. Zamani, M., Maghrebi, M.J. and Moshizi, S.A. (2016), "Numerical study of airfoil thickness effects on the performance of J-shaped straight blade vertical axis wind turbine", Wind Struct., 22(5), 595-616. https://doi.org/10.12989/was.2016.22.5.595.
  33. Zamani, M., Maghrebi, M.J. and Varedi, S.R. (2016), "Starting torque improvement using J-shaped straight-bladed Darrieus vertical axis wind turbine by means of numerical simulation", Renew. Energy, 95, 109-126. http://dx.doi.org/10.1016/j.renene.2016.03.069.