Acoustic characterization of a cavitation tunnel for ship propeller noise studies

IF 13 1区工程技术 Q1 ENGINEERING, MARINE

Journal of Ocean Engineering and Science Pub Date : 2025-06-01 DOI:10.1016/j.joes.2024.02.001

J.A. Bocanegra , D. Borelli , T. Gaggero , R. Picó , G. Tani

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引用次数: 0

Abstract

The noise radiated by ship propellers can be studied by analyzing scaled models in a cavitation tunnel. However, transferring the measurements made in the enclosed space of the tunnel to the expected values in a full-scale propeller (in a free field) presents a challenge for noise measurements. An acoustic characterization of the DITEN cavitation tunnel, including a study of normal modes and acoustic response to harmonic sources, is presented to understand the primary acoustic behaviour of the enclosure and its propagation characteristics. A three-dimensional numerical model was developed to simulate the DITEN Genoa University cavitation tunnel and evaluate the influence of elements such as a dynamometer, fins, impeller, and source position on the acoustic response of the tunnel. The study showed the influence of the mentioned elements on the acoustic response of the tunnel, and the numerical predictions were validated by comparing them with the experimental campaign in the low-mid frequency range. The study provides valuable insights into the behaviour of sound waves in a cavitation tunnel and the influence of various factors, which can help design and optimize cavitation tunnels and related experiments.

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用于船舶螺旋桨噪声研究的空化隧道声学特性分析

船舶螺旋桨辐射噪声可以通过空化隧道的比例模型分析来研究。然而，将在隧道封闭空间中进行的测量转换为全尺寸螺旋桨（在自由场中）的期望值，对噪声测量提出了挑战。本文介绍了DITEN空化隧道的声学特性，包括对正常模式和谐波源的声学响应的研究，以了解外壳的主要声学行为及其传播特性。建立了热那亚大学空化隧道的三维数值模拟模型，评估了测力计、翅片、叶轮和声源位置等因素对隧道声响应的影响。研究表明了上述因素对隧道声响应的影响，并将数值预测结果与实验结果在中低频范围内进行了比较，验证了数值预测结果的正确性。该研究为进一步了解空化隧道中声波的特性以及各种因素的影响提供了有价值的见解，为空化隧道的设计和优化以及相关实验提供了依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Ocean Engineering and Science Multiple-

CiteScore

11.50

自引率

19.70%

发文量

224

审稿时长

29 days

期刊介绍： The Journal of Ocean Engineering and Science (JOES) serves as a platform for disseminating original research and advancements in the realm of ocean engineering and science. JOES encourages the submission of papers covering various aspects of ocean engineering and science.