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Dynamic stall control via adaptive blowing

Author

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  • Müller-Vahl, Hanns Friedrich
  • Nayeri, Christian Navid
  • Paschereit, Christian Oliver
  • Greenblatt, David

Abstract

An aerodynamic load control concept termed “adaptive blowing” was successfully tested on a NACA 0018 airfoil model at Reynolds numbers ranging from 1.5·105 to 5·105. The global objective was to eliminate lift oscillations typically encountered on wind turbine blade sections. Depending on the jet momentum flux, steady blowing from a control slot in the leading-edge region can be utilized to either enhance or reduce lift by suppressing or inducing boundary layer separation respectively. Furthermore, high momentum blowing effectively eliminated the dynamic stall vortex during deep dynamic stall conditions. Based on these previous findings, the present work explores the feasibility of controlling unsteady aerodynamic loads by dynamically varying the jet momentum flux to compensate for transient changes of the inflow. Various scenarios including high amplitude pitching, rapid freestream oscillations and combinations of both were investigated in a custom-built unsteady wind tunnel facility. An iterative control algorithm was implemented which successfully identified the momentum coefficient time profiles required to minimize the lift excursions. The combination of fully suppressing dynamic stall and dynamically adjusting the lift coefficient provided an unprecedented control authority, producing virtually constant phase averaged lift in all cases.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:renene:v:97:y:2016:i:c:p:47-64
    DOI: 10.1016/j.renene.2016.05.053
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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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    Cited by:

    1. Zhu, Chengyong & Qiu, Yingning & Wang, Tongguang, 2021. "Dynamic stall of the wind turbine airfoil and blade undergoing pitch oscillations: A comparative study," Energy, Elsevier, vol. 222(C).
    2. Stefan Hoerner & Iring Kösters & Laure Vignal & Olivier Cleynen & Shokoofeh Abbaszadeh & Thierry Maître & Dominique Thévenin, 2021. "Cross-Flow Tidal Turbines with Highly Flexible Blades—Experimental Flow Field Investigations at Strong Fluid–Structure Interactions," Energies, MDPI, vol. 14(4), pages 1-17, February.
    3. Garzozi, Anan & Greenblatt, David, 2023. "Wind energy generation by forced vortex shedding," Applied Energy, Elsevier, vol. 349(C).
    4. 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.
    5. Md Zishan Akhter & Farag Khalifa Omar, 2021. "Review of Flow-Control Devices for Wind-Turbine Performance Enhancement," Energies, MDPI, vol. 14(5), pages 1-35, February.
    6. 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.
    7. Fatehi, Mostafa & Nili-Ahmadabadi, Mahdi & Nematollahi, Omid & Minaiean, Ali & Kim, Kyung Chun, 2019. "Aerodynamic performance improvement of wind turbine blade by cavity shape optimization," Renewable Energy, Elsevier, vol. 132(C), pages 773-785.
    8. Velasco, D. & López Mejia, O. & Laín, S., 2017. "Numerical simulations of active flow control with synthetic jets in a Darrieus turbine," Renewable Energy, Elsevier, vol. 113(C), pages 129-140.
    9. De Tavernier, D. & Ferreira, C. & Viré, A. & LeBlanc, B. & Bernardy, S., 2021. "Controlling dynamic stall using vortex generators on a wind turbine airfoil," Renewable Energy, Elsevier, vol. 172(C), pages 1194-1211.
    10. Zhu, Chengyong & Chen, Jie & Wu, Jianghai & Wang, Tongguang, 2019. "Dynamic stall control of the wind turbine airfoil via single-row and double-row passive vortex generators," Energy, Elsevier, vol. 189(C).
    11. Zhu, Chengyong & Feng, Yi & Shen, Xiang & Dang, Zhigao & Chen, Jie & Qiu, Yingning & Feng, Yanhui & Wang, Tongguang, 2023. "Effects of the height and chordwise installation of the vane-type vortex generators on the unsteady aerodynamics of a wind turbine airfoil undergoing dynamic stall," Energy, Elsevier, vol. 266(C).
    12. Mohammadi, Morteza & Maghrebi, Mohammad Javad, 2021. "Improvement of wind turbine aerodynamic performance by vanquishing stall with active multi air jet blowing," Energy, Elsevier, vol. 224(C).

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