KCS船模静水航行破波噪声数值预报
Numerical Prediction of Wave Breaking Noise for KCS Ship Model in Still Water Navigation
于连杰 1王建华 1万德成1
作者信息
- 1. 上海交通大学船海计算水动力学研究中心(CMHL),海洋工程全国重点实验室,船舶海洋与建筑工程学院 上海 200240
- 折叠
摘要
水下噪声涉及舰船隐身性以及舒适性.静水中航行兴破碎波现象由于复杂的两相流特性,其噪声预报尤为困难.论文采用Deane-Czerski经验公式并改进了其中部分参数的计算公式,对常见的破波气泡分布进行噪声预报的研究.数据表明,论文预报结果与试验结果较为吻合,这对未来水下噪声预报提供了一个可行方案.然后对一艘国际标准船模KCS进行船首兴波破碎流动模拟.选取Fr=0.35工况,采用开源CFD工具包OpenFOAM求解器,流场模拟选择延迟分离涡模拟方法.针对FW-H声学方程中的偶极子和四极子项对声压的贡献进行分析.结果表明:在低频范围,四极子声压占主导;在中间频率范围,偶极子声压占主导;在高频范围,气泡噪声占主导.
Abstract
Underwater noise is related to ship stealth as well as comfort,but the breaking wave phenomenon is particularly difficult to predict due to its complex two-phase flow characteristics.In this paper,we adopt the Deane-Czerski empirical formula and improve the calculation of some parameters in the formula to conduct a noise prediction study on the distribution of common wave-breaking bubbles.The results show that the prediction results are more consistent with the experimental results and provide a feasible program for future underwater noise prediction.Next,the benchmark KCS ship model is used to study the bow-breaking wave flow with Froud number 0.35 selected,and OpenFOAM,an open-source CFD platform,is used to simulate the flow field with the delayed detached eddy simulation method.The contribution of dipole and quadrupole to the sound pressure in the FW-H acoustic equation is analyzed.The results show that the quadrupole sound pressure dominates in the low-frequency range,the dipole sound pressure dominates in the middle-frequency range,and the bubble noise dominates in the high-frequency range.
关键词
KCS船模/船首兴波破碎/破波噪声/Deane-Czerski模型Key words
KCS ship model/breaking bow waves/breaking wave noise/Deane-Czerski model引用本文复制引用
基金项目
国家自然科学基金项目(52131102)
国家重点研发计划项目(2019YFB1704200)
出版年
2024
NETL
NSTL
万方数据