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Research Article Hydrodynamic noise and noise source characteristics of an upstream hydrofoil and propeller system Zhihao Ma, Peng Li (1-2) ; Pengbo Xu (1) ; Lianzhou Wang (1); Adrian Portillo-Juan (3) ; Esteban Ferrer (2) (1) School of Mechanics and Aerospace Engineering, Southwest Jiaotong University, Chengdu, People's Republic of China (2) ETSIAE-UPM-School of Aeronautics, Universidad Politécnica de Madrid, Madrid, Spain (3) CEHINAV—Canal de Ensayos Hidrodinámicos de la ETSI Navales, Universidad Politécnica de Madrid, Madrid, Spain Physics of Fluids 38, 106202 (2026) https://doi.org/10.1063/5.0351514 #etsinavales #navalesUPM #somosupm #etsiae #swjtu #underwateracousticaleffects #hydroacousticmonitoring #fluidwakes #hydrodynamicexcitations