Standard control models of floating offshore wind turbines treat heave-plate hydrodynamic forces with simplified drag coefficients, but real sea states are dominated by complex vortex-shedding phenomena that conventional formulations cannot capture. This project deliberately steps outside the doctoral 'control/theory' framework to interrogate the underlying fluid-physics — specifically the damping mechanism driven by vortex shedding around heave plates in the low Keulegan–Carpenter (KC) regime. CFD simulations (Code_Saturne) carried out at Kyushu University are paired with tank experiments at ENSTA Paris (Institut Polytechnique de Paris), under a collaboration with Prof. Luc Pastur initiated by the applicant. PIV-based visualization quantifies vortex shedding under irregular waves and at low frequencies. The outcome is a more general, physics-grounded heave-plate design formula that can be embedded as a parameter in the doctoral state-space model, closing the loop between physical understanding and control design.

Standard control models of floating offshore wind turbines treat heave-plate hydrodynamic forces with simplified drag coefficients, but real sea states are dominated by complex vortex-shedding phenomena that conventional formulations cannot capture. This project deliberately steps outside the doctoral 'control/theory' framework to interrogate the underlying fluid-physics — specifically the damping mechanism driven by vortex shedding around heave plates in the low Keulegan–Carpenter (KC) regime. CFD simulations (Code_Saturne) carried out at Kyushu University are paired with tank experiments at ENSTA Paris (Institut Polytechnique de Paris), under a collaboration with Prof. Luc Pastur initiated by the applicant. PIV-based visualization quantifies vortex shedding under irregular waves and at low frequencies. The outcome is a more general, physics-grounded heave-plate design formula that can be embedded as a parameter in the doctoral state-space model, closing the loop between physical understanding and control design.