Orateur
Description
Perforated heave plates are widely used to suppress the heave motion of floating offshore wind turbines, yet existing damping models do not disentangle perforation-induced ("hole") and edge-vortex ("edge") damping contributions, preventing scalable physics-based design formulas. As a first step toward the systematic decomposition of these contributions, a two-dimensional ALE finite-volume CFD framewark is developped for oscillating solid and perforated heave plates ($D_p =0.4( m), e=0.008(m)$) in Code_Saturne 9.0, over $KC \in [0.1, 1.2]$. CFD Results show that the damping coefficient $C_b$ of the perforated plate consistently exceeds that of the solid plate for low values of $KC$, and become similar at $KC \approx 1.0$. We also plan to share the results of the comparison with the coefficients measured in the experimental research conducted by Francisco, a PhD student at ENSTA Paris. Future work will focus on explaining this convergence through vortex dynamics analysis and on clarifying the role of the free surface.