Adaptive control technology for gap flow of dynamic positioning ship propulsion
In order to improve the propulsion efficiency of propeller,reduce energy consumption and improve the sta-bility of dynamic positioning ship,the adaptive control technology of propeller clearance flow of dynamic positioning ship is proposed.A dynamic positioning ship propeller test model is constructed.The flexible sealing structure is used to treat the outer wall of the propeller ring and the groove area of the conduit,and the output power of the impeller and rotor rim of the dynamic positioning ship propeller is calculated.The hydrodynamic parameters of the propeller are calculated in a dimen-sionless way,and the frequency spectrum characteristics of the vibration acceleration of the propeller shafting are obtained,so as to realize the adaptive control of the propeller clearance flow of the dynamic positioning ship.The experimental results show that the larger the gap size,the lower the open water efficiency of the propeller.The flexible sealing structure can con-trol the gap flow of the propeller,increase the thrust coefficient and torque coefficient of the propeller rotor,and will not af-fect the open water efficiency of the propeller.The research technology makes the axial and lateral acceleration amplitude of propeller rotor decrease obviously.The gap flow loss is greater when the flange length is longer.
dynamic positioning shippropulsiongap flowflexible sealing structureorthogonal experimentopen water efficiency
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