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Comparison of Aerodynamic Loads for Horizontal Axis Wind Turbine (II): with and without Vertical Wind Shear Effect
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Comparison of Aerodynamic Loads for Horizontal Axis Wind Turbine (II): with and without Vertical Wind Shear Effect
Kim, Jin; Kang, Seung-Hee; Ryu, Ki-Wahn;
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The large scale wind turbine blades usually experience periodic change of inflow speed due to blade rotation inside the ground shear flow region. Because of the vertical wind shear, the inflow velocity in the boundary layer region is maximum at uppermost position and minimum at lowermost position. These spatial distribution of wind speeds can lead to the periodic oscillation of the 6-component loads at hub and low speed shaft of the wind turbine rotor. In this study we compare the aerodynamic loads between two inflow conditions, i.e, uniform flow (no vertical wind shear effect) and normal wind profile. From the computed results all of the relative errors for oscillating amplitudes increased due to the ground shear flow effect. Especially bending moment and thrust at hub, and bending moments at LSS increased enormously. It turns out that the aerodynamic analysis including the ground shear flow effect must be considered for fatigue analysis.
Horizontal Axis Wind Turbine;Uniform Flow;Normal Wind Profile;Low-Speed Shaft(LSS);
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Burton, T., Sharpe, D., Jenkins, N., andBossanyi, E., Wind energy handbook, 2ndedition, John Wiley & Sons, 2011.

Bailey, B. H., "Predicting vertical wind profiles as a function of time of the day and surface wind speed," Proceedings of an International Colloquium on Wind Energy, BWEA, Brighton, UK, 1981.

IEC-61400-1, Wind Turbine Generator Systems, Part 1: Safety Requirements. International Electrotechnical Commission, Geneva, Swiss, 2005.

KIm, D. H., Lee, J. H., Tran, T. T., Kwak, Y. S., and Song, J. S., "Extreme Design Load Case Analyses of a 5 MW Offshore Wind Turbine Using Unsteady Computational Fluid Dynamics," Journal of Wind Energy, Vol. 5, No. 1, 2014, pp. 22-32.

Ryu, Ki-Wahn, "Optimal Aerodynamic Design and Performance Analysis for Pitch-Controlled HAWT," Journal of the Korean Society for Aeronautical and Space Sciences, Vol. 35, No. 10, 2007, pp. 891-898. crossref(new window)

Viterna, L. A., and Corrigan, R. D., "Fixed pitch rotor performance of large horizontal axis wind turbines," Proceedings, Workshop on Large Horizontal Axis Wind Turbine, NASA, P-2203, DOE Publication. CONF-810752, Cleveland, OH: NASA Lewis Research Center, 1981, pp. 69-85.

Himmelskamp, H., Profile investigations on a rotating airscrew, Ph.D. Thesis, Gottingen University. Germany, 1945.

Du, Z. and Selig, M. S., "A 3-D stalldelay model for horizontal axis wind turbineperformance prediction," Proc. 1998 ASME Wind Energy Symposium, 36th AIAA Aerospace Science Meeting, AIAA 1998-0021, 1998.

Betz, A., Schraubenpropeller mit geringstem energieverlust, Gottinger Nachr., Germany, 1919.

Buhl, M. L., Jr., A new empirical relationship between thrust coefficient and induction factor for the turbulent windmill state, NREL/TP-500-36834, Golden, CO. NREL, September, 2004.

Hansen, M. H., Gaunaa, M., Aagaard Madsen, H., "A Beddoes-Leishman type dynamic stall model in state-space and indicial formulation," RisO-R-1354, Roskilde, Denmark, 2004.

Hsu, S. A., "Determining the power-law wind-profile exponent under near neutral stability conditions at sea," Journal of Applied Meteorology, 1994, pp. 757-765.

Jonkman, J. M., and Buhl, M. L., Jr., FAST User's Guide, NREL/EL-500-29798, NREL, March, 2004.

Moriarty, P. J., Hansen, A. C., "AeroDyn Theory Manual," NREL/TP-500-36881, January, 2005.