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

다국어 초록 (Multilingual 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.

참고문헌 (Reference)

1 Robert Howell, "Wind tunnel and numerical study of a small vertical axis wind turbine" Elsevier BV 35 (35): 412-422, 2010

2 A. Biswas, "Unsteady aerodynamics of a twist bladed H-Darrieus rotor in low Reynolds number flow" AIP Publishing 6 (6): 033108-, 2014

3 Abdolrahim Rezaeiha, "Towards accurate CFD simulations of vertical axis wind turbines at different tip speed ratios and solidities: Guidelines for azimuthal increment, domain size and convergence" Elsevier BV 156 : 301-316, 2018

4 Mahdi Zamani, "Three dimensional simulation of J-shaped Darrieus vertical axis wind turbine" Elsevier BV 116 : 1243-1255, 2016

5 Md Farhad Ismail, "The effects of aerofoil profile modification on a vertical axis wind turbine performance" Elsevier BV 80 : 20-31, 2015

6 A. R. Sengupta, "The aerodynamics of high solidity unsymmetrical and symmetrical blade H-Darrieus rotors in low wind speed conditions" AIP Publishing 9 (9): 043307-, 2017

7 Siddhant Jain, "The State-of-the-Art Technology of H-Type Darrieus Wind Turbine Rotors" ASME International 142 (142): 2020

8 A.R. Sengupta, "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" Elsevier BV 93 : 536-547, 2016

9 Mahdi Zamani, "Starting torque improvement using J-shaped straight-bladed Darrieus vertical axis wind turbine by means of numerical simulation" Elsevier BV 95 : 109-126, 2016

10 Chougule, P., "Simulation of flow over double-element airfoil and wind tunnel test for use in vertical axis wind turbine" 524 (524): 012009-, 2014

11 Rogelio Martinez, "Shape effect of thickness of the NREL S815 profile on the performance of the H-rotor Darrieus turbine" AIP Publishing 13 (13): 013301-, 2021

12 N.C. Batista, "On a self-start Darrieus wind turbine: Blade design and field tests" Elsevier BV 52 : 508-522, 2015

13 Deshpande, P, "Numerical study of giromill- type wind turbines with symmetrical and non-symmetrical airfoils" 2 (2): 195-208, 2013

14 Mahdi Zamani, "Numerical study of airfoil thickness effects on the performance of J-shaped straight blade vertical axis wind turbine" 한국풍공학회 22 (22): 595-616, 2016

15 Elyas Sobhani, "Numerical investigation of dimple effects on darrieus vertical axis wind turbine" Elsevier BV 133 : 231-241, 2017

16 Soh, Z.P., "Numerical Analysis of the Shape of Dimple on the Aerodynamic Efficiency of NACA 0012 Airfoil"

17 Law, J.S.W, "Numerical Analysis of the Effect of the Number of Round Dimples on the Aerodynamics Efficiency of NACA 0012 Airfoil"

18 Xingxing Li, "Large thickness airfoils with high lift in the operating range of angle of attack" AIP Publishing 6 (6): 033110-, 2014

19 S. Bhuyan, "Investigations on self-starting and performance characteristics of simple H and hybrid H-Savonius vertical axis wind rotors" Elsevier BV 87 : 859-867, 2014

20 Anal R. Sengupta, "Investigations of H-Darrieus rotors for different blade parameters at low wind speeds" 한국풍공학회 25 (25): 551-567, 2017

21 M.A. Singh, "Investigation of self-starting and high rotor solidity on the performance of a three S1210 blade H-type Darrieus rotor" Elsevier BV 76 : 381-387, 2015

22 Jie Su, "Investigation of V-shaped blade for the performance improvement of vertical axis wind turbines" Elsevier BV 260 : 114326-, 2020

23 Habtamu Beri, "Effect of Camber Airfoil on Self Starting of Vertical Axis Wind Turbine" Science Alert 4 (4): 302-312, 2011

24 Islam, M., "Desirable airfoil features for smaller-capacity straight-bladed VAWT" 31 (31): 165-196, 2007

25 R. Gupta, "Computational fluid dynamics analysis of a twisted three-bladed H-Darrieus rotor" AIP Publishing 2 (2): 043111-, 2010

26 Gupta, R., "Computational fluid dynamics analysis of a twisted airfoil shaped two-bladed H- Darrieus rotor made from fibreglass reinforced plastic (FRP)" 1 (1): 953-968, 2010

27 A.R. Sengupta, "Comparison of low wind speed aerodynamics of unsymmetrical blade H-Darrieus rotors-blade camber and curvature signatures for performance improvement" Elsevier BV 139 : 1412-1427, 2019

28 László Daróczy, "Comparative analysis of turbulence models for the aerodynamic simulation of H-Darrieus rotors" Elsevier BV 90 : 680-690, 2015

29 M.H. Mohamed, "Blade shape effect on the behavior of the H-rotor Darrieus wind turbine: Performance investigation and force analysis" Elsevier BV 179 : 1217-1234, 2019

30 Ning Ma, "Airfoil optimization to improve power performance of a high-solidity vertical axis wind turbine at a moderate tip speed ratio" Elsevier BV 150 : 236-252, 2018

31 Sheldahl, R.E, "Aerodynamic characteristics of seven symmetrical airfoil sections through 180-degree angle of attack for use in aerodynamic analysis of vertical axis wind turbines"

32 Louis Angelo Danao, "A numerical study of blade thickness and camber effects on vertical axis wind turbines" SAGE Publications 226 (226): 867-881, 2012

33 Kaminsky, C., "A CFD study of wind turbine aerodynamics" Ohio Northern University 1-18, 2012