侧壁式气垫船艏柔性密封的流固耦合数值研究  

Numerical Study on Fluid-Structure Interactions for Flexible Sealing of Surface Effect Ship Bow

作　　者：王大同 陈鑫[1,2] 刘小健[3] 刘义 Wang Datong;Chen Xin;Liu Xiaojian;Liu Yi(School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240;Key Laboratory of Hydrodynamics,Ministry of Education,Shanghai 200240;Marine Design and Research Institute of China,Shanghai 200011)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]水动力学教育部重点实验室,上海200240 [3]中国船舶及海洋工程设计研究院,上海200011

出　　处：《水动力学研究与进展（A辑）》2023年第6期907-916,共10页Chinese Journal of Hydrodynamics

基　　金：中央高校基本科研业务费专项资金资助(MARIC-SJTU联合创新基金项目编号:K24441-1)。

摘　　要：该文基于双向流固耦合问题的分离式数值解法和VOF多相流模型,数值模拟了侧壁式气垫船航行过程中船艏柔性密封结构与水-气两相流之间的相互耦合作用,并将密封变形与密西根大学实验结果进行比对,结果显示:较之前人数值模拟,该文对密封末端位移的计算与实验之间的误差最多可减小29.17%。此外,该文系统性地研究了不同气垫压强及Froude数对船艏密封所受流体阻力的影响,并进行了无量纲分析,结果表明:在相同Froude数下,密封所受无量纲流体阻力与无量纲垫压间保持幂函数关系,流体阻力随气垫压强增加而增大;在同气垫压强下,随Froude数增加,流体阻力表现出先减小后增大的变化规律,这是密封变形后攻角及流体动压变化耦合作用的结果。A numerical method based on the partitioned method and the VOF model is used to simulate interactions between flexible bow seal structure and two-phase flow of water and air during a surface effect ship's navigation.The seal deformation is compared with experimental results from the University of Michigan.The effects of different air cushion pressures and Froude numbers on seal resistance are systematically studied,and non-dimensional analysis is conducted.The results show that,under the same Froude number,non-dimensional seal resistance maintains a power-law relationship with non-dimensional cushion pressure,and the seal resistance increases with the increase of cushion pressure.Under the same cushion pressure,the fluid resistance decreases first and then increases with the increase of Froude number,which is the result of the coupling effect of the attack angle and hydrodynamic change after the seal deformation.

关 键 词：侧壁式气垫船 流固耦合 多相流 

分 类 号：O359[理学—流体力学]