摘要
五体船是继当代三体船之后提出的又一种多体新船型,该新船型付诸实用前必须对其兴波特性和侧体布局减阻设计进行研究。根据五体船各片体的科钦函数线性叠加和坐标变换原理,提出了基于片体科钦函数展开的分项算法和基于片体科钦函数叠加的整体算法求解多体船兴波阻力,得出了单体船、三体船、五体船通用的线性兴波阻力公式。应用CFD通用软件进一步分析五体船阻力及片体兴波干扰特性,提出了基于CFD模拟的自由面波形观测的五体船片体布局优化,对各种侧体布局下的五体船兴波特性直观地定性判定。根据综合兴波阻力线性理论计算和粘性流体动力CFD求解所得五体船阻力结果及其特性,提出具有工程实用意义的五体船优化构型方案。研究表明,势流线性理论计算和CFD求解五体船阻力的方法和所得五体船优化构型方案具有广阔的应用前景。
The pentamaran was proposed as another new concept of multihull ship form following the contemporary trimarans.The investigation on the wave resistance characteristics and resistance reducing outrigger configuration is necessary for its application.According to the Cochin function linear superposition and coordinate transformation principle of the central hull and four outriggers of pentamarans,the expanded and whole arithmetic for the Cochin function were brought forward to solve the multihull ship wave resistance,which reduced the general wave resistance expression for monohulls,trimarans and pentamarans.CFD software was used to make further analysis on the characteristics of pentamaran wave resistance and of the central hull and outriggers wave interference,and the outrigger configuration optimization based on the wave pattern observation of CFD numerical simulation free surface was proposed for the pentamarans,which provided a perceivable qualitative judgment resort to the wave making feature for various configurations of the pentamaran.And according to the results of linear wave resistance and viscous hydrodynamic CFD calculation,we proposed the pentamaran optimized configurations with practical application significance.It is concluded that present linear theory of the potential flow and CFD method for the pentamaran resistance calculation and the pentamaran configuration based on that have important significance in future practical application.
出处
《中国舰船研究》
2011年第6期1-7,22,共8页
Chinese Journal of Ship Research
关键词
线性兴波阻力
五体船
兴波干扰
CFD
波形
linear wave resistance
pentamaran
wave interference
CFD
wave pattern
