This paper adopts the theoretical method to research the problem on the performance prediction and the design of the propeller operating in ship wake systematically 本文采用理论方法系统地研究了非均匀流场中螺旋桨性能预报和理论设计问题。
The idea is to define a group of flow primitives such as uniform flow , sinking flow , source flow , vertex flow and then synthesize these flow primitives into a complex flow 该方法定义一组原始流如均匀流、源点流、汇点流、漩涡流等,采用合成的方法合成复杂的水流。
Experimental result shows that the non - uniform flux of open channel is single - valued corresponding to the opening angle of the plate and water depth in front of the plate , and satisfies the dualistic function 通过试验可知:细长板开启角度、明渠非均匀流流量与板前水深三者单值对应,并满足二元函数的变化关系。
When the propeller operates in the spatially non - uniform velocity field behind the ship , the unsteady cavitation on the blades often causes the vibration of ship structure , the propeller noise and the cavitation erosion on the blade 在船尾非均匀流场中工作的螺旋桨,常常由于桨叶上产生了非定常空泡,导致船尾振动和螺旋桨噪声,致使桨叶表面出现空泡剥蚀。