RT Journal Article T1 Force and torque reactions on a pitching flexible aerofoil A1 Sanmiguel-Rojas, Enrique A1 Perona, J.L. A1 Fernández-Feria, Ramón K1 Dinámica de fluidos -- Medición AB Experimental measurements in a wind tunnel of the unsteady force and moment that a fluid exerts on flexible flapping aerofoils are not trivial because the forces and moments caused by the aerofoil's inertia and others structural tensions at the pivot axis have to be obtained separately and subtracted from the direct measurements with a force/torque sensor. Here we derive from the nonlinear beam equation general relations for the force and torque reactions at the leading edge of a pitching aerofoil in terms of the fluid force and moment on the aerofoil and its kinematics, involving geometric and structural parameters of the flexible aerofoil. These relations are validated by comparing high-resolution numerical simulations of the flow–structure interaction of a two-dimensional flexible aerofoil pitching about its leading edge with direct force and torque measurements in a wind tunnel. PB Cambridge YR 2023 FD 2023 LK https://hdl.handle.net/10630/26405 UL https://hdl.handle.net/10630/26405 LA eng NO Sanmiguel-Rojas, E., Perona, J., & Fernandez-Feria, R. (2023). Force and torque reactions on a pitching flexible aerofoil. Journal of Fluid Mechanics, 961, A34. doi:10.1017/jfm.2023.258 NO This research has been supported by the Junta de Andalucía, Spain (UMA18-FEDER-JA-047 and P18-FR-1532).Funding for open access charge: Universidad de Málaga. DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 19 ene 2026