三因次换算方法中相关补贴系数ΔC_F计算方法的探讨  

On the calculation of correlation △C_F in three-dimensional conversion

作　　者：沈玉林 沈奇心 赵汉魂 陈纪平 

出　　处：《船舶》2003年第4期8-11,共4页Ship & Boat

摘　　要：本文通过对20000～150000吨级的30余艘肥大型单桨运输船舶在我所拖曳水池做了与试航状态排水量与吃水相一致的船模对比试验的分析与比较,提出了一种适应于我所水池用三因次换算的相关补贴系数ΔC_F(或称粗糙度补贴系数)的取值方法。通过计算表明,用该方法预报的实船功率与实船测量结果基本一致,且计算得到的推进因子可信度较好,功率相关因子C_P为1左右,转速相关因子C_N也接近1。本方法对于其它水池ΔC_F的取值(也即K_S的取值)有参考价值。This paper analyzes and compares the series experiments of over 30 full-form single-crew cargo ships from 20 000 to 150 000 tonnage in towing tank of MARIC using the same displacement and draft as used for sea trial conditions. The paper then proposes a method to obtain the value of correlation coefficient (or roughness allowance) in three-dimensional conversion that suitable for the model testing in MARIC. The results show that the power demand obtained from this prediction is consistent with the sea trial measurement of the full-scale ship, and the propulsion factor has good creditability. The correlation coefficient Cp of power coefficient is around 1. The speed correlation coefficient CN is close to 1. It is proved this method can serve a good reference for ACF. value calculation for other model basins.

关 键 词：三因次换算方法 船舶模型 水池试验 计算方法 粗糙度补贴系数 相关补贴系数 

分 类 号：U661[交通运输工程—船舶及航道工程]