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Matched pitch rate extensions to dynamic stall on rotor blades

Author

Listed:
  • Müller-Vahl, Hanns Friedrich
  • Pechlivanoglou, Georgios
  • Nayeri, Christian Navid
  • Paschereit, Christian Oliver
  • Greenblatt, David

Abstract

Dynamic stall on both horizontal axis and vertical axis wind turbine blades is accompanied by simultaneous changes in pitch and surge, but this simultaneous effect has never been documented. Using a unique unsteady wind tunnel, synchronous oscillations in angle of attack and flow speed were considered on two prototypical wind turbine blades. At a steady freestream, the concept of matched pitch rate was observed to be valid for large positive and negative pitch angles. In the presence of an unsteady stream, matching the flow speed as well as the pitch angle and its time derivative during pitch-up produced excellent correspondence between lift, drag and moment coefficients throughout the entire dynamic stall event.

Suggested Citation

  • Müller-Vahl, Hanns Friedrich & Pechlivanoglou, Georgios & Nayeri, Christian Navid & Paschereit, Christian Oliver & Greenblatt, David, 2017. "Matched pitch rate extensions to dynamic stall on rotor blades," Renewable Energy, Elsevier, vol. 105(C), pages 505-519.
    • Handle: RePEc:eee:renene:v:105:y:2017:i:c:p:505-519
    DOI: 10.1016/j.renene.2016.12.070
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    References listed on IDEAS

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    1. He-Yong Xu & Chen-Liang Qiao & Zheng-Yin Ye, 2016. "Dynamic Stall Control on the Wind Turbine Airfoil via a Co-Flow Jet," Energies, MDPI, vol. 9(6), pages 1-25, June.
    2. Müller-Vahl, Hanns Friedrich & Nayeri, Christian Navid & Paschereit, Christian Oliver & Greenblatt, David, 2016. "Dynamic stall control via adaptive blowing," Renewable Energy, Elsevier, vol. 97(C), pages 47-64.
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    1. Rezaeiha, Abdolrahim & Pereira, Ricardo & Kotsonis, Marios, 2017. "Fluctuations of angle of attack and lift coefficient and the resultant fatigue loads for a large Horizontal Axis Wind turbine," Renewable Energy, Elsevier, vol. 114(PB), pages 904-916.
    2. Liu, Jian & Zhu, Wenqing & Xiao, Zhixiang & Sun, Haisheng & Huang, Yong & Liu, Zhitao, 2018. "DDES with adaptive coefficient for stalled flows past a wind turbine airfoil," Energy, Elsevier, vol. 161(C), pages 846-858.
    3. Rezaeiha, Abdolrahim & Montazeri, Hamid & Blocken, Bert, 2019. "On the accuracy of turbulence models for CFD simulations of vertical axis wind turbines," Energy, Elsevier, vol. 180(C), pages 838-857.
    4. Rezaeiha, Abdolrahim & Montazeri, Hamid & Blocken, Bert, 2018. "Towards optimal aerodynamic design of vertical axis wind turbines: Impact of solidity and number of blades," Energy, Elsevier, vol. 165(PB), pages 1129-1148.

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