Effect of pre-swirl stator angles on broadband noise considering hydrodynamic performance of pump-jet propeller

IF 1.5 4区工程技术 Q3 ENGINEERING, MARINE

Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment Pub Date : 2024-09-15 DOI:10.1177/14750902241272880

Min-Hyeok Kim, Suk-Yoon Hong, Jee-Hun Song

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Abstract

A pump-jet propeller is composed of a rotor, stator, and duct. A pre-swirl stator is employed to optimize flow into the rotor. The hydrodynamic and noise performances of pump-jet propellers vary with the stator angles. In this study, the hydrodynamic performance of a full-scale submarine and pump-jet propeller is assessed by conducting computational fluid dynamics simulations based on the Reynolds-averaged Navier–Stokes equation. Additionally, broadband noise, blade-passing frequency noise, and a significant factor, that is, underwater radiated noise are predicted using Lighthill’s equation, Green’s function, and wall pressure spectrum. Unsteady forces were extracted from the flow field to obtain the blade-passing frequency noise. Broadband noise could not be calculated directly from the flow field owing to the absence of small eddies, and wall pressure spectrum was used to obtain high-frequency broadband noise. The overall noise, including broadband noise and blade-passing frequency noise, was evaluated. The optimal stator angle for the rotor at the self-propulsion point was determined considering the propulsion efficiency and noise level of the pump-jet propeller.

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考虑到泵式喷气推进器的流体力学性能，预旋流定子角度对宽带噪声的影响

泵喷气推进器由转子、定子和管道组成。预旋流定子用于优化进入转子的流量。泵喷气推进器的流体动力学性能和噪声性能随定子角度的变化而变化。在本研究中，通过基于雷诺平均纳维-斯托克斯方程的计算流体动力学模拟，评估了全尺寸潜艇和泵喷气推进器的流体动力学性能。此外，还利用莱特希尔方程、格林函数和壁面压力谱预测了宽带噪声、叶片通过频率噪声和一个重要因素，即水下辐射噪声。从流场中提取非稳态力来获得叶片通过频率噪声。由于没有小涡流，无法直接从流场中计算宽带噪声，因此使用壁压谱来获得高频宽带噪声。对包括宽带噪声和叶片通过频率噪声在内的整体噪声进行了评估。考虑到泵喷气推进器的推进效率和噪声水平，确定了自推进点转子的最佳定子角度。

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

Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment ENGINEERING, MARINE-

CiteScore

3.90

自引率

11.10%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal of Engineering for the Maritime Environment is concerned with the design, production and operation of engineering artefacts for the maritime environment. The journal straddles the traditional boundaries of naval architecture, marine engineering, offshore/ocean engineering, coastal engineering and port engineering.