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A PROCEDURE FOR DESIGN OF DUCTS TO REDUCE PROPELLER CAVITATIONS AND VIBRATIONS.

机译:用于减少螺旋桨空化和振动的导管设计程序。

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摘要

his study extends and improves the current propeller ducts design procedure, which substantially reduces selected spatial harmonics of any given ship model nominal wake and thus homogenizes the inflow field to the enshrouding propeller. This fact will constitute the most important factor in the study of the ducted-propeller problem since by controlling and homogenizing the propeller inflow field the vibratory characteristics of the system will be minimized and the intermittent blade cavitation will be reduced substantially. The duct shape is determined by means of the so-called "Penalty Function" which guarantees the minimum value of the propeller inflow field. Three schemes have been studied in the attempt to ameliorate the inflow field: Scheme
机译:他的研究扩展并改进了当前的螺旋桨风道设计程序,从而大大减少了任何给定船舶模型的标称尾迹的选定空间谐波,从而使流入笼罩的螺旋桨的流场均匀。这个事实将成为研究管道螺旋桨问题的最重要因素,因为通过控制和均匀化螺旋桨流入场,系统的振动特性将被最小化,间歇性叶片气穴现象将大大减少。管道形状是通过所谓的“罚函数”确定的,该函数保证了螺旋桨流入场的最小值。为了改善流入场,已研究了三种方案:方案

著录项

  • 作者

    CHEN, JUI-KUNG.;

  • 作者单位

    Stevens Institute of Technology.;

  • 授予单位 Stevens Institute of Technology.;
  • 学科 Engineering Marine and Ocean.
  • 学位 Ph.D.
  • 年度 1984
  • 页码 300 p.
  • 总页数 300
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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