With the increasing demand for aquatic weed management in small and medium-sized aquaculture enterprises, existing propulsion systems such as propeller-driven, water-jet propulsion, and adjustable-blade paddle wheel-based weed-cutting vessels face challenges of poor adaptability and high costs, making them unsuitable for small-scale aquaculture farmers. This study employs the ANSYS Fluent hydrodynamic simulation model to investigate the mechanical characteristics and **energy consumption efficiency of a cost-effective, highly adaptable fixed-blade paddle wheel weed-cutting vessel under static water conditions. By establishing a three-dimensional model of the hull and paddle wheel, combined with dynamic mesh technology and User-Defined Functions (UDFs), this research simulates the thrust of the paddle wheel, hull resistance, and flow field distribution under varying blade inclination angles while maintaining consistent blade numbers and rotational speeds. Theoretical analysis is conducted to evaluate energy consumption performance under fixed rotational speeds. The results demonstrate that blade inclination angle significantly impacts energy consumption efficiency under identical rotational speeds and blade configurations. This study aims to provide a theoretical foundation for the design optimization of fixedblade paddle wheel weed-cutting vessels, validate the **efficiency and reliability** of CFD simulations in naval hydrodynamic analysis, and lay the groundwork for subsequent energy consumption studies and energy-saving solutions in complex aquatic environments.
