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Improved blade element momentum theory for wind turbine aerodynamic computations

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  • Sun, Zhenye
  • Chen, Jin
  • Shen, Wen Zhong
  • Zhu, Wei Jun

Abstract

Blade element momentum (BEM) theory is widely used in aerodynamic performance predictions and design applications for wind turbines. However, the classic BEM method is not quite accurate which often tends to under-predict the aerodynamic forces near root and over-predict its performance near tip. The reliability of the aerodynamic calculations and design optimizations is greatly reduced due to this problem. To improve the momentum theory, in this paper the influence of pressure drop due to wake rotation and the effect of radial velocity at the rotor disc in the momentum theory are considered. Thus the axial induction factor in far downstream is not simply twice of the induction factor at disc. To calculate the performance of wind turbine rotors, the improved momentum theory is considered together with both Glauert’s tip correction and Shen’s tip correction. Numerical tests have been performed for the MEXICO rotor. Results show that the improved BEM theory gives a better prediction than the classic BEM method, especially in the blade tip region, when comparing to the MEXICO measurements.

Suggested Citation

  • Sun, Zhenye & Chen, Jin & Shen, Wen Zhong & Zhu, Wei Jun, 2016. "Improved blade element momentum theory for wind turbine aerodynamic computations," Renewable Energy, Elsevier, vol. 96(PA), pages 824-831.
    • Handle: RePEc:eee:renene:v:96:y:2016:i:pa:p:824-831
    DOI: 10.1016/j.renene.2016.05.035
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    References listed on IDEAS

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    1. Iván Herráez & Bernhard Stoevesandt & Joachim Peinke, 2014. "Insight into Rotational Effects on a Wind Turbine Blade Using Navier–Stokes Computations," Energies, MDPI, vol. 7(10), pages 1-25, October.
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    1. Shafiqur Rehman & Md. Mahbub Alam & Luai M. Alhems & M. Mujahid Rafique, 2018. "Horizontal Axis Wind Turbine Blade Design Methodologies for Efficiency Enhancement—A Review," Energies, MDPI, vol. 11(3), pages 1-34, February.
    2. Wenbin Su & Hongbo Wei & Penghua Guo & Qiao Hu & Mengyuan Guo & Yuanjie Zhou & Dayu Zhang & Zhufeng Lei & Chaohui Wang, 2021. "Research on Hydraulic Conversion Technology of Small Ocean Current Turbines for Low-Flow Current Energy Generation," Energies, MDPI, vol. 14(20), pages 1-19, October.
    3. Hailay Kiros Kelele & Lars Frøyd & Mulu Bayray Kahsay & Torbjørn Kristian Nielsen, 2022. "Characterization of Aerodynamics of Small Wind Turbine Blade for Enhanced Performance and Low Cost of Energy," Energies, MDPI, vol. 15(21), pages 1-23, October.
    4. Huilai Ren & Xiaodong Zhang & Shun Kang & Sichao Liang, 2018. "Actuator Disc Approach of Wind Turbine Wake Simulation Considering Balance of Turbulence Kinetic Energy," Energies, MDPI, vol. 12(1), pages 1-19, December.
    5. Dai, Juchuan & Li, Mimi & Chen, Huanguo & He, Tao & Zhang, Fan, 2022. "Progress and challenges on blade load research of large-scale wind turbines," Renewable Energy, Elsevier, vol. 196(C), pages 482-496.
    6. Zh. Zhang, 2022. "Conceptual Errors in Actuator Disc Theory and Betz’s Law for Wind Turbines," Energies, MDPI, vol. 15(16), pages 1-15, August.

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