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Interaction between flow field and blade forces on HAWT integrating Lagrangian interpolation of velocities with an actuator volume technique

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  • Regodeseves, P. García
  • Morros, C. Santolaria

Abstract

Aerodynamics of the MEXICO wind turbine is investigated using an actuator volume technique to represent the blades, the explicit geometries of the nacelle and the tower, and a sliding mesh scheme to enable the complete turbine-wind interaction. In order to improve the accuracy of the numerical model, an in-house code was developed to couple the aerodynamic forces applied on the actuator volumes and the predicted flow-field. A key feature of the proposed approach is that the velocity at the rotor plane is estimated using Lagrangian interpolation from control points unaffected by bound vorticity. For spacing the control points upstream and downstream of the rotor, two reference distances based on the rotor diameter and the chord were assessed, resulting in a global force discrepancy of 0.25%. A comprehensive validation was conducted using experimental data and blade-resolved simulations. The aerodynamic performance and the flow around the wind turbine were well reproduced. The unsteady flow topology was visualised in terms of velocity contours and using the Q-criterion to identify coherent vortical structures. The numerical method is robust, compatible with unstructured solvers, suitable for parallel computing, and capable of accurately reproducing the aerodynamic behaviour of wind turbines.

Suggested Citation

  • Regodeseves, P. García & Morros, C. Santolaria, 2026. "Interaction between flow field and blade forces on HAWT integrating Lagrangian interpolation of velocities with an actuator volume technique," Renewable Energy, Elsevier, vol. 256(PA).
    • Handle: RePEc:eee:renene:v:256:y:2026:i:pa:s0960148125014284
    DOI: 10.1016/j.renene.2025.123766
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