Effect of chord-to-diameter ratio on vertical-axis wind turbine wake development
Tóm tắt
The wake structure of a vertical-axis wind turbine (VAWT) is strongly dependent on the tip-speed ratio,
$$\lambda$$
, or the tangential speed of the turbine blade relative to the incoming wind speed. The geometry of a turbine can influence
$$\lambda$$
, but the precise relationship among VAWT geometric parameters and VAWT wake characteristics remains unknown. To investigate this relationship, we present the results of an experiment to characterize the wakes of three VAWTs that are geometrically similar except for the ratio of the turbine diameter (D), to blade chord (c), which was chosen to be
$$D/c =$$
3, 6, and 9. For a fixed freestream Reynolds number based on the blade chord of
$$Re_c = 1.6\times 10^3$$
, both two-component particle image velocimetry (PIV) and single-component hot-wire anemometer measurements are taken at the horizontal mid-plane in the wake of each turbine. PIV measurements are ensemble averaged in time and phase averaged with each rotation of the turbine. Hot-wire measurement points are selected to coincide with the edge of the shear layer of each turbine wake, as deduced from the PIV data, which allows for an analysis of the frequency content of the wake due to vortex shedding by the turbine.
Tài liệu tham khảo
Ainslie JF (1988) Calculating the flowfield in the wake of wind turbines. J Wind Eng Ind Aerodyn 27:213–224
Araya DB, Dabiri JO (2015) A comparison of wake measurements in motor-driven and flow-driven turbine experiments. Exp Fluids 56(7):1–15
Araya DB, Colonius T, Dabiri JO (2017) Transition to bluff-body dynamics in the wake of vertical-axis wind turbines. J Fluid Mech 813:346–1120
Armstrong S, Fiedler A, Tullis S (2012) Flow separation on a high Reynolds number, high solidity vertical axis wind turbine with straight and canted blades and canted blades with fences. Renew Energy 41:13–22. https://doi.org/10.1016/j.renene.2011.09.002
Barsky DA, Posa A, Rahromostaqim M, Leftwich M, Balaras E (2014) Experimental and computational wake characterization of a vertical axis wind turbine. 32nd AIAA applied aerodynamics conference. Atlanta, GA
Barthelmie RJ, Rathmann O, Frandsen ST, Hansen KS, Politis E, Prospathopoulos J, Rados K, Cabezón D, Schlez W, Phillips J, Neubert A, Schepers JG, Pijl SPVD (2007) Modelling and measurements of wakes in large wind farms. J Phys Conf Ser 75(012):049. https://doi.org/10.1088/1742-6596/75/1/012049
Battisti L, Zanne L, Dell’Anna S, Dossena V, Persico G, Paradiso B (2011) Aerodynamic measurements on a vertical axis wind turbine in a large scale wind tunnel. J Energy Resour Technol 133(3):031,201. https://doi.org/10.1115/1.4004360
Bianchini A, Ferrara G, Ferrari L (2015) Design guidelines for H-Darrieus wind turbines: optimization of the annual energy yield. Energy Convers Manag 89:690–707. https://doi.org/10.1016/j.enconman.2014.10.038
Brusca S, Lanzafame R, Messina ÁM (2014) Design of a vertical-axis wind turbine: how the aspect ratio affects the turbine’s performance. Int J Energy Environ Eng 5:333–340. https://doi.org/10.1007/s40095-014-0129-x
Cal R, Lebrón J, Castillo L (2010) Experimental study of the horizontally averaged flow structure in a model wind-turbine array boundary layer. J Renew Sustain Energy 2(1):013,106. https://doi.org/10.1063/1.3289735
Calaf M, Meneveau C, Meyers J (2010) Large eddy simulation study of fully developed wind-turbine array boundary layers. Phys Fluids 22(1):015110. https://doi.org/10.1063/1.3291077
Chamorro LP, Hill C, Morton S, Ellis C, Arndt REA, Sotiropoulos F (2013) On the interaction between a turbulent open channel flow and an axial-flow turbine. J Fluid Mech 716(May):658–670. https://doi.org/10.1017/jfm.2012.571
Dabiri JO (2011) Potential order-of-magnitude enhancement of wind farm power density via counter-rotating vertical-axis wind turbine arrays. J Renew Sustain Energy 3(4):043104. https://doi.org/10.1063/1.3608170
Dunne R, McKeon BJ (2015) Dynamic stall on a pitching and surging airfoil. Exp Fluids 56(8):1–15. https://doi.org/10.1007/s00348-015-2028-1
Edwards J, Danao L, Howell R (2015) PIV measurements and CFD simulation of the performance and flow physics and of a small-scale vertical axis wind turbine. Wind Energy 18(2):201–217. https://doi.org/10.1002/we.1690
Howell R, Qin N, Edwards J, Durrani N (2010) Wind tunnel and numerical study of a small vertical axis wind turbine. Renew Energy 35(2):412–422
Möllerström E, Larsson S, Ottermo F, Hylander J, Bååth L (2014) Noise propagation from a vertical axis wind turbine. In: internoise, pp 1–8
Parker CM, Leftwich MC (2016) The effect of tip speed ratio on a vertical axis wind turbine at high Reynolds numbers. Exp Fluids 57(5):1–4864. https://doi.org/10.1007/s00348-016-2155-3
Posa A, Parker CM, Leftwich MC, Balaras E (2016) Wake structure of a single vertical axis wind turbine. Int J Heat Fluid Flow 61:75–84. https://doi.org/10.1016/j.ijheatfluidflow.2016.02.002
Roh SC, Kang SH (2013) Effects of a blade profile, the Reynolds number, and the solidity on the performance of a straight bladed vertical axis wind turbine. J Mech Sci Technol 27(11):3299–3307. https://doi.org/10.1007/s12206-013-0852-x
Ryan KJ, Coletti F, Elkins CJ, Dabiri JO, Eaton JK (2016) Three-dimensional flow field around and downstream of a subscale model rotating vertical axis wind turbine. Exp Fluids 57(3):1–15. https://doi.org/10.1007/s00348-016-2122-z
Simão Carlos F, Van Gijs K, Van Gerard B, Fulvio S (2009) Visualization by PIV of dynamic stall on a vertical axis wind turbine. Exp Fluids 46(1):97–108. https://doi.org/10.1007/s00348-008-0543-z
Tescione G, Ragni D, He C, Simão Ferreira C, van Bussel G (2014) Near wake flow analysis of a vertical axis wind turbine by stereoscopic particle image velocimetry. Renew Energy 70:47–61. https://doi.org/10.1016/j.renene.2014.02.042
Zhou J, Adrian RJ, Balachandar S, Kendall TM (1999) Mechanisms for generating coherent packets of hairpin vortices in channel flow. J Fluid Mech 387:353–396. https://doi.org/10.1017/S002211209900467X