尾鳍间距对江海直达船快速性影响研究  

Study on Powering Performance of River-sea Ship with Different Distance Between Skegs

作　　者：李子时 许辉[2] 陈立[2] 贺伟[1] 秦江涛[1] LI Zishi;XU Hui;CHEN Li;HE Wei;QIN Jiangtao(School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of technology,Wuhan 430063,China;China Ship Development and Design Center,Wuhan 430064,China)

机构地区：[1]武汉理工大学船海与能源动力工程学院,武汉430063 [2]中国舰船研究设计中心,武汉430064

出　　处：《武汉理工大学学报（交通科学与工程版）》2023年第2期269-274,共6页Journal of Wuhan University of Technology（Transportation Science & Engineering）

摘　　要：文中以KVLCC2船型为对象进行了船、桨绕流场数值模拟方法的验证,对不同尾鳍间距的江海直达船进行了快速性数值预报,基于数值结果分解自航因子,并探讨了相关的规律与机理.结果表明:①排水量不变时尾鳍间距增大会使得湿表面积增加、浮心后移,分别是摩擦和粘压阻力增大的原因;②尾鳍间距较大时流经桨盘的流线所覆盖的尾鳍面积、逆压梯度、偏转程度更小,是导致推力减额随尾鳍间距增大而降低的原因;③采用传统等推力法分解自航因子时,桨前来流的周向预旋是导致自航点转速、进速系数、伴流分数等自航因子变化的主要原因,且传统方法所得的自航因子无法反映流动的真实情况.The numerical simulation method of the flow field around the ship and propeller was verified by taking the KVLCC2 ship as the object.The rapid numerical prediction of river-sea direct ships with different tail fin spacing was carried out,and the self-propelled factors were decomposed based on the numerical results,and the related laws and mechanisms were discussed.The results show that:①when the displacement is constant,the increase of the tail fin spacing will increase the wet surface area and the floating center will move backward,which are the reasons for the increase of friction and viscous pressure resistance respectively.②When the tail fin spacing is large,the tail fin area covered by the streamline flowing through the paddle is smaller,and the reverse pressure gradient and deflection degree are smaller,which is the reason why the thrust derating decreases with the increase of the tail fin spacing.③When the traditional equal thrust method is used to decompose the self-propelled factor,the circumferential pre-rotation of the forward flow of the propeller is the main reason for the change of the self-propelled factor such as the speed of the self-propelled point,the velocity coefficient and the wake fraction,and the self-propelled factor obtained by the traditional method cannot reflect the real situation of the flow.

关 键 词：双尾鳍船型 快速性 数值模拟 预旋 

分 类 号：U661.31[交通运输工程—船舶及航道工程]