Abstract: Aiming at the difficulty and inefficiency of manual cleaning of enteromorpha, a near-shore canola negative pressure salvage device was designed. The enteromorpha was adsorbed through the suction of the negative pressure generated by the propeller. Fluent software was used to calculate the hydrodynamic performance of negative pressure adsorption. Through dynamic simulation, the negative pressure generated by the negative pressure adsorption device was measured, and the relationship between the flow velocity, the watershed area and the negative pressure adsorption force formed by the local water flow was analyzed. The reliability of the simulation was verified by experiments. The results indicate that the negative pressure generated by the rotation of the propeller can effectively absorb the canola, and it has significant effect on improving the fishing efficiency of enteromorpha.
Key words: propeller; negative pressure adsorption device; Fluent; adsorption force