螺旋桨工作模式对四桨船操纵性影响试验研究

Experimental Study on Influence of Propellers' Operating Modes upon Maneuvering Characteristics for a Quadruple-screw Ship

针对四桨船航行过程中存在着四桨工作、两内桨工作外桨自由或者两外桨工作内桨自由的情况,在开阔静水水域中进行了大尺度自航模回转试验和Z形试验,对比分析了不同螺旋桨工作模式下自航模型操纵运动规律。结果表明,两内桨工作时的回转性指数、转艏指数比四桨工作时高,四桨工作时比两外桨高;两内桨工作时的应舵指数比四桨工作时低,四桨工作时比两外桨低。因此,两内桨工作模式下自航模的回转性、稳定性、应舵性均优于四桨及两外桨工作模式下的值。

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.