| 考虑自由面反射作用的圆柱流噪声计算 |
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| 引用本文： | 袁常乐,赵伟文,万德成.考虑自由面反射作用的圆柱流噪声计算[J].海洋工程,2022,40(4):129-136. |
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| 作者姓名： | 袁常乐 赵伟文 万德成 |
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| 作者单位： | 上海交通大学 船海计算水动力学研究中心(CMHL) 船舶海洋与建筑工程学院, 上海 200240 |
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| 基金项目： | 国家重点研发计划资助项目(2019YFB1704200);国家自然科学基金资助项目(52131102,51879159) |
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| 摘 要： | 对于现代舰船而言噪声是其关键性能之一，目前水下航行体的流激噪声预测方法已经较为成熟，但是水面舰船的水动力噪声研究起步较晚，还没有形成系统的预报方法和控制手段。使用开源CFD工具包OpenFOAM求解器，流场通过大涡模拟方法求解，自由液面则依靠VOF方法捕捉，通过Curle方程预测远场噪声，基于镜像法考虑自由面的反射作用，数值模拟近自由面圆柱周围的声场分布。开展了Re=3 900下距离自由液面不同高度的圆柱辐射噪声求解，主要结合流场分析自由面对声场的扰动作用和不同深度对水下几何体流噪声的影响。初步考虑了自由液面波形对辐射噪声的反射作用，为后续预测水面舰船的水动力噪声特性提供依据，自由面对辐射噪声的阻抗等作用还需进一步研究。
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| 关 键 词： | 流噪声 自由液面 辐射噪声 镜像法 圆柱绕流 |
| 收稿时间： | 2021/11/3 0:00:00 |
Analysis of underwater radiation noise of cylinder considering the reflection of free surface |
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| YUAN Changle,ZHAO Weiwen,WAN Decheng.Analysis of underwater radiation noise of cylinder considering the reflection of free surface[J].Ocean Engineering,2022,40(4):129-136. |
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| Authors: | YUAN Changle ZHAO Weiwen WAN Decheng |
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| Institution: | Computational Marine Hydrodynamics Lab (CMHL), School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China |
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| Abstract: | Noise is one of the key performances of modern ships. At present, the flow-induced noise prediction methods of underwater vehicles are relatively mature, but there has not been a systematic prediction method of ships because the research started late. We use the open source CFD toolkit OpenFOAM solver, with LES solving the flow field, the VOF method capturing the free liquid surface, and Curle equation predicting the radiated noise. The image method is used for simulation of the reflection of free surface. The calculation of the cylindrical radiated noise at different heights from the free surface under Re=3 900 is carried out, and the influence of different depths on the flow-induced noise of cylinder is analyzed. The reflection of free surface on the radiated noise is initially considered, which provides a basis for the subsequent prediction of the hydrodynamic noise characteristics of ships. The impedance of the free surface to the radiated noise needs to be further studied. |
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| Keywords: | flow-induced noise free surface radiated noise method of images circular cylinder |
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