Predicting the Radiated Noise of a Submarine Propeller with Different Types of Control Surfaces

IF 1.3 4区 工程技术 Q3 ENGINEERING, CIVIL Journal of Ship Research Pub Date : 2021-09-07 DOI:10.5957/josr.07190038
J. Kao, S. Chin, F. Chang, Yu-Han Tsai, Hua Wu, Huan-Jia Xu
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Abstract

The objective of this paper is to predict the noise radiated from submarine propellers with different control surface types (the cross- and X-type). When the propellers are free from cavitation, such as those of submarines at a diving depth, the radiated noise dominate, due to unsteady propeller forces. A well-known submarine model (DARPA SUBOFF) is taken as the computing sample. Simulations for hydrodynamics, including stern wakes and unsteady propeller forces, are carried out by using CFD (Computational Fluid Dynamics) technology, and the results are compared with the experimental data. The accuracy of the predicted noise depends on the CFD results. Comparisons between the CFD results and the experimental data are in good agreement. The CFD results are treated as dipole strengths in the linear wave theory to predict the radiated noise caused by the unsteady forces of the propeller. It is found that, when the control surface is of the X-type, the propeller inflow is more uniform, and the radiated noise can be decreased by about 5 dB compared to the cruciform control surface. When submarines are at diving depth, the noise generated by unsteady propeller forces (i.e., dipole strengths) will dominate. Because the juncture vortex caused by the sail makes the propeller inflow more nonuniform, the dipole strength will be enhanced and the radiated noise will be more noticeable. The uniformity of the wake field at the stern should be controlled well in order to restrain the radiated noise.
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不同控制面类型潜艇螺旋桨辐射噪声的预测
本文的目的是预测不同控制面类型(十字型和X型)的潜艇螺旋桨辐射的噪声。当螺旋桨没有气穴时,例如潜艇在潜水深度的螺旋桨,由于不稳定的螺旋桨力,辐射噪声占主导地位。以一个著名的潜艇模型(DARPA SUBOFF)为计算样本。利用CFD(Computational Fluid Dynamics)技术对包括尾流和非定常螺旋桨力在内的流体动力学进行了模拟,并将结果与实验数据进行了比较。预测噪声的准确性取决于CFD结果。CFD结果与实验数据之间的比较非常一致。CFD结果被视为线性波理论中的偶极子强度,以预测螺旋桨非定常力引起的辐射噪声。研究发现,当控制表面为X型时,螺旋桨流入更加均匀,并且与十字形控制表面相比,辐射噪声可以降低约5dB。当潜艇处于潜水深度时,由不稳定螺旋桨力(即偶极强度)产生的噪音将占主导地位。由于帆引起的接合涡流使螺旋桨流入更加不均匀,因此偶极子强度将增强,辐射噪声将更加明显。为了抑制辐射噪声,应控制好尾流场的均匀性。
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来源期刊
Journal of Ship Research
Journal of Ship Research 工程技术-工程:海洋
CiteScore
2.80
自引率
0.00%
发文量
12
审稿时长
6 months
期刊介绍: Original and Timely technical papers addressing problems of shipyard techniques and production of merchant and naval ships appear in this quarterly publication. Since its inception, the Journal of Ship Production and Design (formerly the Journal of Ship Production) has been a forum for peer-reviewed, professionally edited papers from academic and industry sources. As such, it has influenced the worldwide development of ship production engineering as a fully qualified professional discipline. The expanded scope seeks papers in additional areas, specifically ship design, including design for production, plus other marine technology topics, such as ship operations, shipping economic, and safety. Each issue contains a well-rounded selection of technical papers relevant to marine professionals.
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