摘要
[目的]复合材料具有重量轻、耐腐蚀性强、高阻尼比高等优点,为提高水下航行器的综合性能,开展复合材料转子泵喷推进器的特性研究。[方法]首先,结合计算流体力学(CFD)与有限元法(FEM),建立复合材料转子泵喷推进器的双向流固耦合数值方法和基于FW-H方程的流噪声预报方法;然后,针对不同工况,分析复合材料转子泵喷推进器的敞水性能、结构响应以及流噪声特性。[结果]结果表明:随着进速系数的增加,复合材料泵喷推进器的转子结构变形、应力应变均有所减小,而流噪声总声压级则先减小后增加,且在J=0.8时的最低值为87.60dB。与传统铝合金泵喷推进器相比,模型尺度下复合材料泵喷推进器的转子结构变形很小,未引起其水动力性能的明显变化;复合材料泵喷推进器的流噪声在特定频率时出现了小幅下降,同时噪声总声压级也有所下降。[结论]研究成果可为泵喷推进器的减重设计、降噪设计等综合性能优化提供理论依据。
[Objective]Composite materials offer advantages such as low weight,corrosion resistance and a high damping ratio.To enhance the overall performance of underwater vehicles,this study investigates the characteristics of a composite rotor pump-jet propulsor.[Method]Firstly,by combining computational fluid dynamics(CFD)and the finite element method(FEM),a two-way fluid-structure interaction method and a flow-induced noise prediction method were established based on FW−H equation for the composite rotor pump-jet propulsor.The open water performance,structural response and flow-induced noise characteristics of the composite rotor pump-jet propulsor were then analyzed under various operating conditions.[Results]The results show that with the increase in advance speed coefficient,the structural deformation and stress and strain levels of the composite pump-jet propulsor rotor decrease.The overall sound pressure level of flow-induced noise first decreases and then increases,reaching a minimum of 87.60 dB at J=0.8.Compared with a traditional aluminum alloy pump-jet propulsor,the rotor deformation of the model-scale composite pump-jet propulsor is minimal.It does not affect the hydrodynamic shape or cause significant changes in hydrodynamic performance.The flow-induced noise of composite pump-jet propulsor is reduced slightly at specific frequencies,and the overall reduction in sound pressure level is also relatively limited.[Conclusion]These research findings provide a theoretical basis for the comprehensive performance optimization of pump-jet propulsors,including weight reduction and noise control design.
作者
卢博
宋博扬
黄桥高
李晗
何幸
郑思洁
LU Bo;SONG Boyang;HUANG Qiaogao;LI Han;HE Xing;ZHENG Sijie(School of Marine Science and Technology,Northwestern Polytechnical University,Xi'an 710072,China;China State Shipbuilding Corporation Limited,Shanghai 200011,China)
出处
《中国舰船研究》
北大核心
2025年第5期150-159,共10页
Chinese Journal of Ship Research
基金
中央高校基本科研业务费专项资金资助项目(D5000240318,HYGJXM202319)
国家自然科学基金资助项目(51979226)。
关键词
泵喷推进器
复合材料
敞水性能
结构响应
流噪声
计算流体力学
流固耦合
pump-jet propulsor
composite materials
open water performance
structural response
flow noise
computational fluid dynamics
fluid structure interaction
