摘要
为了探究弹性螺旋桨在航行体复杂伴流场中的结构变形规律及其对激励力的影响机理,采用计算流体力学/有限元流固耦合方法开展航行体-螺旋桨组合模型的数值模拟.根据由谐调分析得到的均匀与非均匀水下伴流场特性,分析不同伴流场中弹性螺旋桨的稳态变形与动态变形规律.对比刚性与弹性螺旋桨的激励力时均值与脉动幅值的差异,分析结构变形对激励力产生影响的内在机理.研究结果表明,弹性螺旋桨的稳态变形主要由伴流场中的时均载荷驱动,螺距角增大导致轴向力时均值提升了9.5%;动态变形主要由非均匀伴流场中的脉动载荷驱动,能够缓冲来流激励并自适应调节,从而显著抑制螺旋桨轴向激励力叶频处的脉动幅值,降幅达到86.1%.研究揭示了弹性螺旋桨结构变形对激励力的调控机制,为船舶推进系统的应用和激励力控制提供了理论依据.
A fluid-structure interaction method based on computational fluid dynamics and finite element analysis was employed for conducting numerical simulation of vehicle-propeller combined models to investigate the structural deformation law of an elastic propeller in the complex wake field of a vehicle and the effect of this deformation on excitation forces.Based on the characteristics of both uniform and non-uniform submarine wake fields obtained through harmonic analysis,the steady and dynamic deformation characteristics of the elastic propeller under different wake fields were analyzed.The rigid and elastic propellers were compared in terms of the time-averaged value and the fluctuating amplitude of excitation forces,so as to analyze the underlying mechanism by which the structural deformation affected the excitation forces.The experimental results showed that steady deformation of the elastic propeller was mainly driven by the time-averaged load in the wake field,and the increased pitch angle led to a 9.5%rise in the time-averaged axial force.The dynamic deformation,which was mainly driven by the fluctuating load in the nonuniform wake field,could buffer the inflow excitation and provide adaptive regulation,thus significantly suppressing the pulsating amplitude of the propeller’s axial excitation force at the blade frequency with a reduction of 86.1%.This study reveals the regulatory mechanism of structural deformation of elastic propellers on excitation forces and provides theoretical support for the application of marine propulsion systems and the control of excitation forces.
作者
陈蔚然
蔡昊鹏
吴浩
卜延鹏
曹琳琳
吴大转
CHEN Weiran;CAI Haopeng;WU Hao;BU Yanpeng;CAO Linlin;WU Dazhuan(College of Energy Engineering,Zhejiang University,Hangzhou 310027,China;Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China)
出处
《浙江大学学报(工学版)》
北大核心
2026年第1期179-190,共12页
Journal of Zhejiang University(Engineering Science)
基金
国家自然科学基金联合基金资助项目(U2341242)。
关键词
弹性螺旋桨
流固耦合
伴流场
结构变形
激励力
elastic propeller
fluid-structure interaction
wake field
structural deformation
excitation force
