VLCC大侧斜螺旋桨设计可行性研究

本文阐述了大侧斜螺旋桨设计软件包的功能及其使用特点。设计软件包括升力线和升力面设计程序，并能自动生成桨的三投影图和标准尺寸。通过对４艘大型船舶６个大仙斜桨的模型试验，证实了设计方法是可信的，程序包是有效的。为与常规的图谱设计方法进行比较，对其中两艘船按桢的条件各设计了一个ＭＡＵ桨，并加工了桨模。在大型空不筒中用假尾模拟伴流场后对７个桨模作了脉动压力测量。试验结果表明，大侧斜桨与常规桨相比，脉动压力

Feasibility Study of Highly-skewed Propeller for VLCC

A highly-skewed propeller (HSP)design package has been developed, its feature and function are described. Six HSP models for four large scale ships were designed and tested. The Iesults indicate that the design method has high accuracy and the package is reliable. The package, which includes the computer program based on lifting line method and lifting surface method, can generates propeller drawing automatically. In addition to the HSP, two MAU conventional propellers for two ships were designed as well. Comparative experiments of seven propeller models behind wake field simulated by dummy model for fluctuating pressure measurement were carried out in cavitation tunnel. The results show that fluctuating pressure induced by HSP may is 30% lower than that by MAU conventionl propellers, then HAP induces low vibration forces. Self-propulsion tests in towing tank also show that ships fitted with HSP can reach same speed as with the conventional one. Finally, an example of HSP for a 280,000t VLCC is described.