Development of a Fast Fluid-Structure Coupling Technique for Wind Turbine Computations

Matias Sessarego, Néstor Ramos García, Wen Zhong Shen

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Fluid-structure interaction simulations are routinely used in the wind energy industry to evaluate the aerodynamic and structural dynamic performance of wind turbines. Most aero-elastic codes in modern times implement a blade element momentum technique to model the rotor aerodynamics and a modal, multi-body, or finite-element approach to model the turbine structural dynamics. The present paper describes a novel fluid-structure coupling technique which combines a threedimensional viscous-inviscid solver for horizontal-axis wind-turbine aerodynamics, called MIRAS, and the structural dynamics model used in the aero-elastic code FLEX5. The new code, MIRASFLEX, in general shows good agreement with the standard aero-elastic codes FLEX5 and FAST for various test cases. The structural model in MIRAS-FLEX acts to reduce the aerodynamic load computed by MIRAS, particularly near the tip and at high wind speeds.
Original languageEnglish
JournalJournal of Power and Energy Engineering
Pages (from-to)1-6
Publication statusPublished - 2015


  • Fluid-Structure-Interaction,
  • Wind-Turbine
  • Aero-Elasticity


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