[Problem] To provide a method for further reducing friction resistance of a friction resistance reduced ship. [Solution] Rolling and pitching vary greatly depending on variation in climate etc., but when limited to an extremely short time, the rolling and pitching repeat an almost identical or similar pattern. Therefore, if the pattern of the immediately preceding rolling and pitching is understood, the subsequent pattern can also be predicted. This is similar for a vertical position variation pattern of minute bubble generation units calculated from the angle of the rolling and pitching. Furthermore, the vertical position variation also differs depending on the installation position of each minute bubble generation unit, and thus the present invention measures the vertical position variation for each minute bubble generation unit and also predicts vertical position variation at and after the current time. The predicted vertical position variation is compared with a waterline height, and the time at which the minute bubble generation units below the sea surface will be above the sea surface or the time at which the minute bubble generation units above the sea surface will be below the sea surface are predicted, and an ON/OFF valve 8 is switched at that time.
Method for operating friction resistance reduced ship
2023-03-09
Patent
Electronic Resource
English
Method for operating ship with reduced frictional resistance
European Patent Office | 2023
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