限制水域船-桨-舵一体舵力及脉动压力数值研究  

Numerical analysis of rudder force and fluctuating pressure for hull-propeller-rudder system in restricted water

作　　者：冀楠 杨春 钱志鹏 舒麟棹 万德成[2] JI Nan;YANG Chun;QIAN Zhi-peng;SHU Lin-zhao;WAN De-cheng(School of Shipping and Naval Architecture,Chongqing Jiaotong University,Chongqing 400074,China;Computational Marine Hydrodynamics Lab(CMHL),School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]重庆交通大学航运与船舶工程学院,重庆400074 [2]上海交通大学船舶海洋与建筑工程学院船海计算水动力学研究中心(CMHL),上海200240

出　　处：《水动力学研究与进展（A辑）》2021年第5期677-685,共9页Chinese Journal of Hydrodynamics

基　　金：国家重点研发计划(Grant No.2018YFB1600400);重庆市科学技术委员会基础与前沿研究计划项目(Grant No.cstc2015jcyj A70009)。

摘　　要：为分析受浅水及岸壁效应影响下船-桨-舵一体的舵力和脉动压力的变化特性,基于RANS方程,考虑自由液面的影响,选取Realizable k-ε湍流模型和VOF模型,对船舶在限制水域航行时的水动力性能进行数值模拟。首先对螺旋桨敞水性能和船-桨-舵一体自航进行了数值计算,验证了数值和网格划分方法的合理性。然后分别考虑三个水深和船-岸距离,进行了舵力及脉动压力的数值模拟。研究表明:脉动压力随时间周期性变化且脉动频率相同,P2监测点处的脉动峰值波动最大,且各监测点处叶频BPF和倍叶频2BPF的脉动频率幅值呈现出不同的变化规律;舵力和脉动压力均受浅水效应影响较大,在水深吃水比为1.2时,随着船-岸距离的减小,舵纵向力由阻力变为推力,脉动压力几乎呈线性下降。In order to analyze the variation characteristics of rudder force and fluctuating pressure of hull-propeller-rudder system under the influence of shallow water and bank effect,based on the RANS equation and considering free surface,the realizable k-εturbulence model and the VOF model were selected to simulate the hydrodynamic performance of a ship sailing along restricted water.Firstly,the open water performance of the propeller and the self-propelled hull-propeller-rudder system are calculated,which verifies the rationality of the numerical and mesh generation methods.Then,considering three water depths and ship-bank distances,the rudder force and fluctuating pressure are numerically simulated.The results show that fluctuating pressure changes periodically with time and the fluctuating frequency keeps the same,and the fluctuation of BPF and 2 BPF of the five pressure monitoring points are different;the rudder force and fluctuating pressure are greatly affected by the shallow water effect.When the ratio of water depth to draught is 1.2,the rudder longitudinal force changes from resistance to thrust with the decrease of ship-bank distance,and the fluctuating pressure decreases almost linearly.

关 键 词：限制水域 船-桨-舵一体 脉动压力 舵力 浅水效应 岸壁效应 

分 类 号：U661.1[交通运输工程—船舶及航道工程]