方型系数对双桨大长宽比超肥大船阻力性能的影响

Influence of Block Coefficient on the Resistance Performance of Large Length-width Ratio Vessel with Double-screw

双桨大长宽比超肥大船型是内河集装箱标准船型的发展方向。该船型的线型特殊,长宽比L/B和方型系数C_B超乎常规。为了探讨C_B对双桨大长宽比超肥大船型阻力性能的影响,建立该船型有效功率的定量预报系统,作者在优选母型船的基础上,将C_B在母型船参数附近作系列变化,进行了有四条船模、每一条船模3个不同排水量的C_B系列船模试验。通过系列试验,给出了C_B=0.88～0.94范围的双桨超肥大船型剩余阻力图谱和剩余阻力的修正系数图谱,供设计部门使用。

Large length-width ratio vessel form with double-screw represents the developing tendency of standard inland container ship forms. This kind of ship form has some special scale parameters, such as the unconventional length-width ratio L/B and block coefficient CB. In order to research the influence of CB on large length-width ratio vessels with double-screw, an effective and quantitative power forecast system has been set up. Four ship models with respect to three displacement conditions are experimented on. A series of model tests are designed with the variation of block coefficient CB of an optimal parent ship. Based on the results of model tests, the resistance coefficient and correction coefficient atlas of the large length-width ratio double-screw vessel forms with CB =0.88-0.94 can be supplied to the designers.