TY - JOUR
T1 - Effect of rotor thrust on the average tower drag of downwind turbines
AU - Yoshida, Shigeo
AU - Fujii, Kazuyuki
AU - Hamasaki, Masahiro
AU - Takada, Ao
N1 - Funding Information:
The wind tunnel test was conducted with funding from the “Advanced Practical Research and Development of Wind Power Generation/Advanced Practical Development of Wind Turbine Components/ Research on Over 10 MW Class Wind Turbines (Whole Design)” of the New Energy and Industrial Technology Development Organization (NEDO) in 2013–2014. The authors express gratitude to Keiji Matsushima, Kimihiko Watanabe, and Yuji Ohya for their support for the wind tunnel test. The authors would also like to thank Masataka Motoyama and Omar Ibrahim for their support in the computational fluid dynamics simulation.
Publisher Copyright:
© 2019 by the authors.
PY - 2019/1/12
Y1 - 2019/1/12
N2 - A new analysis method to calculate the rotor-induced average tower drag of downwind turbines in the blade element momentum (BEM) method was developed in this study. The method involves two parts: calculation of the wind speed distribution using computational fluid dynamics, with the rotor modeled as a uniform loaded actuator disc, and calculation of the tower drag via the strip theory. The latter calculation considers two parameters, that is, the decrease in wind speed and the pressure gradient caused by the rotor thrust. The present method was validated by a wind tunnel test. Unlike the former BEM, which assumes the tower drag to be constant, the results obtained by the proposed method demonstrate much better agreement with the results of the wind tunnel test, with an accuracy of 30%.
AB - A new analysis method to calculate the rotor-induced average tower drag of downwind turbines in the blade element momentum (BEM) method was developed in this study. The method involves two parts: calculation of the wind speed distribution using computational fluid dynamics, with the rotor modeled as a uniform loaded actuator disc, and calculation of the tower drag via the strip theory. The latter calculation considers two parameters, that is, the decrease in wind speed and the pressure gradient caused by the rotor thrust. The present method was validated by a wind tunnel test. Unlike the former BEM, which assumes the tower drag to be constant, the results obtained by the proposed method demonstrate much better agreement with the results of the wind tunnel test, with an accuracy of 30%.
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U2 - 10.3390/en12020227
DO - 10.3390/en12020227
M3 - Article
AN - SCOPUS:85060555245
SN - 1996-1073
VL - 12
JO - Energies
JF - Energies
IS - 2
M1 - 227
ER -
