摘要
选取系列60船型(Cb=0.6)为研究对象,采用动态重叠网格技术实现船舶航行中的姿态变化,通过求解RANS方程并结合单相Level Set自由面模拟方法对船舶浅水航行岸壁效应进行数值模拟。假定船舶不动,设置定常流。模拟出船舶的阻力、横向力和转首力矩的系数,与相关文献结果进行对比,吻合良好;同时放开船舶横荡、垂荡和纵摇3个自由度,获得不同岸壁距离下的横移量,分析船速对横移量的影响以及船体压力的变化。采用的重叠网格技术,网格逻辑关系简单,可以快速生成高质量的结构网格,以较少的网格量实现了对浅水中船舶沿岸壁航行的数值模拟,验证了此技术在船舶操纵性数值模拟中的可行性。
Selecting a series 60 ship model（Cb= 0. 6） as research object,the change of ship＇s navigation posture was realized by using the overlapping grid technique,and the bank effect of ships in shallow water was simulated by solving the RANS equations,as well as the single-phase Level Set method,assuming that the ship is still and the flow is steady. The calculated results including ship drag coefficient,lateral force coefficient and yaw moment coefficient agree well with the results in corresponding literatures. By releasing the degree of freedom of ship motion swaying,heaving and pitching,the change of sway in different distance to bank and in different speed in shallow waters,and pressure variation on the boardside can be obtained. The overlapping grid technique was used,which is simple to generate the high-quality structural mesh quickly,so as to achieve the numerical simulation of the bank effect of ships in shallow water with less grids. The proposed technique is feasible in numerical simulation of ship＇s maneuverability.
出处
《船海工程》
北大核心
2017年第1期162-166,共5页
Ship & Ocean Engineering
基金
中央高校基本科研业务费专项资金资助(3132015015)
关键词
CFD
岸壁效应
数值模拟
重叠网格
CFD
bank effect
numerical simulation
overlapping grid
