Modeling study of wake cavitation characteristics of DTMB propeller based on numerical computation

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 : 2024-09-14 DOI:10.1177/14750902241272778

Wu Chengkun, Zhifeng Zhu, Cai Bohua, Yao Yong

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引用次数: 0

Abstract

Based on the RANS method using unstructured grids, numerical simulations of cavitation on the DTMB propeller under uniform inflow conditions were conducted. Through numerical studies of pressure pulsations under different cavitation numbers, it was found that at low cavitation numbers, the pressure fluctuations become irregular with higher amplitude and increased noise. As the cavitation number increases, the pressure tends to stabilize and exhibits periodic fluctuations. Two linear regression models were constructed by the correlation analyzing between the spectral characteristics of the pressure pulsation signals and the operating conditions. The model for the rotational speed and shaft frequency amplitude of the 4381 propeller indicates that the amplitude of the second harmonic of the shaft frequency increases with the advance coefficient. The model for the skew angle and the fourth harmonic amplitude shows that an increase in the skew angle leads to a gradual increase in the amplitude of the fourth harmonic.

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基于数值计算的 DTMB 螺旋桨尾流气蚀特性建模研究

基于使用非结构网格的 RANS 方法，对均匀流入条件下 DTMB 螺旋桨上的气蚀进行了数值模拟。通过对不同空化数下压力脉动的数值研究发现，在低空化数下，压力波动变得不规则，振幅增大，噪声增加。随着空化数的增加，压力趋于稳定并呈现周期性波动。通过分析压力脉动信号的频谱特征与运行条件之间的相关性，建立了两个线性回归模型。4381 型螺旋桨的转速和轴频振幅模型表明，轴频二次谐波振幅随推进系数的增加而增大。倾斜角和四次谐波振幅模型表明，倾斜角增大会导致四次谐波振幅逐渐增大。

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.