Novel scaling law for estimating propeller tip vortex cavitation noise from model experiment

IF 3.4 3区 工程技术 Q1 MECHANICS 水动力学研究与进展:英文版 Pub Date : 2017-12-01 DOI:10.1016/S1001-6058(16)60810-7
Jisoo Park, Woojae Seong
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引用次数: 19

Abstract

The tip vortex cavitation (TVC) noise of marine propellers is of interest due to the environmental impacts from commercial ships as well as for the survivability of naval ships. Due to complicated flow and noise field around a marine propeller, a theoretical approach to the estimation of TVC noise is practically unrealizable. Thus, estimation of prototype TVC noise level is realized through extrapolation of the model TVC noise level measured in a cavitation tunnel. In this study, for the prediction of prototype TVC noise level from a model test, a novel scaling law reflecting the physical basis of TVC is derived from the Rayleigh-Plesset equation, the Rankine vortex model, the lifting surface theory, and other physical assumptions. Model and prototype noise data were provided by Samsung Heavy Industries (SHI) for verification. In applying the novel scaling law, similitude of the spectra of nuclei is applied to assume the same nuclei distribution in the tip vortex line of the model and the prototype. It was found that the prototype TVC noise level predicted by the novel scaling law has better agreement with the prototype TVC noise measurement than the prototype TVC noise level predicted by the modified ITTC noise estimation rule.

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基于模型试验的螺旋桨尖涡空化噪声估计的新标度律
由于商业船只对环境的影响以及海军舰艇的生存能力,船舶螺旋桨的尖涡空化噪声引起了人们的关注。由于船舶螺旋桨周围复杂的流场和噪声场,用理论方法估计TVC噪声在实践中是无法实现的。因此,通过外推在空化隧道中测量到的模型TVC噪声级来实现原型TVC噪声级的估计。在本研究中,为了通过模型试验预测原型TVC噪声级,从Rayleigh-Plesset方程、Rankine涡模型、升力面理论等物理假设出发,推导了反映TVC物理基础的新的标度律。模型和原型噪声数据由三星重工(SHI)提供验证。在应用新的标度律时,利用原子核谱的相似性来假设原子核在模型和原型的尖端涡线上的分布相同。研究发现,与改进的ITTC噪声估计规则预测的原型TVC噪声水平相比,采用新标度律预测的原型TVC噪声水平与原型TVC噪声测量结果更吻合。
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来源期刊
CiteScore
5.90
自引率
0.00%
发文量
1240
期刊最新文献
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