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Experimental Study on Influence of Propellers’ Operating Modes upon Maneuvering Characteristics for a Quadruple-screw Ship
Pages: 60-64
Year: Issue:  6
Journal: Wuhan Shipbuilding

Keyword:  quadruple screw vesseloperating modes of propellersself-propelled model testmaneuverability;
Abstract: There are different operating modes of propeller for the quadruple-screw ship,such as operating conditions with four propellers,two inner propellers and two outer propellers. The turning test and zigzag test of a self-propelled model are carried out in the open still water to investigate its maneuvering characteristics under different operating modes. Experimental results show that the dimensionless turning ability index and the yawing index by two inner propellers is greater than that by four propellers which is greater than that by two outer propellers; the dimensionless steering quality index by two inner propellers is lower than that by four propellers which is lower than that by two outer propellers. Therefore,the turning performance,sailing stability and steering quality by the operating mode of two inner propellers are all superior to the other two modes.
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