水面舰船粘性流场和流噪声的数值计算

于汉; 李清; 杨德庆

doi:10.3969/j.issn.1673-3185.2017.06.004

水面舰船粘性流场和流噪声的数值计算

doi: 10.3969/j.issn.1673-3185.2017.06.004

于汉^{1, 2, 3},
李清^{1, 2, 3},
杨德庆^{1, 2, 3,}

1.
高新船舶与深海开发装备协同创新中心, 上海 200240
2.
上海交通大学海洋工程国家重点实验室, 上海 200240
3.
上海交通大学船舶海洋与建筑工程学院, 上海 200240

基金项目:

国家自然科学基金资助项目 51479115

详细信息

作者简介:
于汉, 男, 1993年生, 硕士生

李清, 男, 1993年生, 博士生

通信作者:
杨德庆(通信作者), 男, 1968年生, 博士, 教授, 博士生导师

中图分类号: U661.44
计量
- 文章访问数: 235
- HTML全文浏览量: 58
- PDF下载量: 76
- 被引次数: 0
出版历程
- 收稿日期: 2017-05-09
- 网络出版日期: 2017-11-28
- 刊出日期: 2017-12-08

Numerical simulation of viscous flow and hydrodynamic noise in surface ship

Han YU^{1, 2, 3},
Qing LI^{1, 2, 3},
Deqing YANG^{1, 2, 3
,}

1.
Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai 200240, China
2.
State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
3.
School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

水面舰船粘性流场和流噪声的数值计算由于汉，等创作，采用知识共享署名4.0国际许可协议进行许可。

摘要

摘要: 目的水面舰船周围因非定常流动引起的流噪声问题是舰船声隐身设计技术的难点，自由液面的存在使之不同于潜艇水动力噪声计算。为解决这一问题，方法采用流体体积（VOF）法结合SST k-ω湍流模型计算船体外非定常流场，赋予自由液面空气声阻抗来模拟吸声边界。将船体表面脉动压力作为流噪声声源，应用声学有限元法计算水面舰船的水下辐射噪声。结果计算所得结果与实验值吻合良好，表明噪声源主要集中在船艏兴波处。结论所得结果表明所用计算方法可以较准确地模拟水面舰船的流场与声场，对水面舰船声隐身设计具有参考价值。
- 流-声耦合 /
- 流噪声 /
- Wigley船型 /
- 流体体积法 /
- SST k-ω
Abstract: Objectives The problem of noise caused by an unsteady flow field around a surface ship is a difficulty facing the stealth design of ship hulls, in which the existence of the free surface makes it different from submarine hydrodynamic noise calculation. To solve this problem, Methods the Volume of Fluid(VOF) method and SST k-ω turbulence model are combined to simulate the unsteady flow field of the hull, and the free surface is given an air acoustic impedance to simulate the absorption boundary. The pulsating pressure of the hull surface is used as the source of the noise, and the underwater radiation noise of the surface ship is calculated with the acoustic finite element method. Results The results show high agreement with the experimental results and previous simulation results. The noise sources are mainly concentrated at the bow of the hull. Conclusions The results show that this calculation method can accurately simulate the flow field and sound field of a surface ship, and it can provides valuable reference for the acoustic stealth design of surface ships.
- fluid-acoustic coupling /
- hydrodynamic noise /
- Wigley hull /
- Volume of Fluid (VOF) method /
- SST k-ω

HTML全文

图 1 Wigley船流场计算域

Figure 1. Flow field computational domain of Wigley hull

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图 2 流场网格拓扑

Figure 2. Flow field mesh topology

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图 3 流场计算网格

Figure 3. Computational mesh for flow field

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图 4 Wigley船体附近网格

Figure 4. Meshes near Wigley hull

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图 5 船体表面波高图

Figure 5. The wave height of hull surface

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图 6 自由液面波高分布

Figure 6. Wave height distribution of free surface

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图 7 用速度大小着色的自由面流线图

Figure 7. Streamline in the free surface colored by velocity magnitude

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图 8 用Q准则可视化的涡量图

Figure 8. Vortex structure visualized using the Q criterion

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图 9 声学边界条件

Figure 9. Acoustic boundary conditions

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图 10 声学有限元计算网格

Figure 10. Acoustic FEM meshes

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图 11 声学观测平面

Figure 11. Acoustic observation plane

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图 12 声学特征点示意图

Figure 12. Schematic diagram of acoustic characteristic points

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图 13 船体表面压力变化率均方根云图

Figure 13. RMS of dpdt on the hull surface

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图 14 频域下湿表面处压力云图

Figure 14. Contours of pressure at the wet surface under the frequency domain

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图 15 垂向声压级

Figure 15. Sound pressure levels in z direction

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图 16 250 Hz下特征截面处的声压分布云图

Figure 16. Contours of sound pressure at the characteristic cross section under 250 Hz

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图 17 500 Hz下特征截面处的声压分布云图

Figure 17. Contours of sound pressure at the characteristic cross section under 500 Hz

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图 18 1 000 Hz下特征截面处的声压分布云图

Figure 18. Contours of sound pressure at the characteristic cross section under 1 000 Hz

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表 1 Wigley船型主要参数

Table 1. The main parameters of Wigley hull

参数	数值
船长L/m	3
船宽B/m	0.3
吃水H/m	0.187 5
湿表面积S/m²	1.338
方形系数C_b	0.444
船模航速u₀/（m·s^-1）	1.627
傅汝德数Fr	0.300
雷诺数Re	5×10⁶

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表 2 阻力系数比较

Table 2. Comparison of resistance coefficients

	C_r	C_f	C_t
CFD	2.01×10^-3	3.36×10^-3	5.37×10^-3
模型实验^[14]	1.87×10^-3	3.45×10^-3	5.32×10^-3
面元法^[14]	1.48×10^-3	-	-

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