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Publications
Liu, J., Qin, P., He, B. and Guedes Soares, C. (2024), Hydrodynamic analysis and experimental verification of cutting device for propeller entanglement, Advances in Maritime Technology and Engineering, Guedes Soares, C. & Santos T.A. (Eds.), Taylor and Francis, London, UK, pp. 155-162.
A novel cutting device is proposed for solving the propeller and shaft entanglement. The rotating cutter is mounted on the propeller in an embedded manner and requires no additional power. The hydrodynamic characteristics of the propeller are predicted based on computational fluid dynamics, especially the effect of the rotating cutter on thrust and torque at different rotational speeds. Steady-state calculations are performed using the shear stress transport k-w turbulence model and the multiple reference frames method. For open water performance, the effect of the cutter on thrust and torque is progressively apparent as rotational speed increases. However, the simulation results show that the cutter has a negligible effect on self-propulsion performance. Tank experiments demonstrate that the cutting device can effectively cut various fishing nets, cables, and seaweed, enabling the propeller to recover normal rotation. Nevertheless, there is a significant increase in propeller torque when the cutter performs cutting tasks.
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