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쌍축선 추진기 캐비테이션 소음 모형시험 연구A Study on the Model Test for the Twin Propeller Cavitation Noise

Other Titles
A Study on the Model Test for the Twin Propeller Cavitation Noise
Authors
박철수김건도임근태박영하장현길장영훈
Issue Date
2018
Publisher
대한조선학회
Keywords
쌍축 추진기 캐비테이션 소음; 모형시험; 전달함수; Twin propeller cavitation noise; Model test; Transfer function
Citation
대한조선학회 논문집, v.55, no.1, pp 28 - 36
Pages
9
Journal Title
대한조선학회 논문집
Volume
55
Number
1
Start Page
28
End Page
36
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/498
DOI
10.3744/SNAK.2018.55.1.28
ISSN
1225-1143
Abstract
The experimental results of the model tests for the twin propeller cavitation noise are presented. The model test was carried out by means of procedure of noise measurement followed by the signal processing and full-scale extrapolation. In order to convert the measured sound pressure level into the sound source level, transfer function measurements for three conditions were performed according to the combination of locations and number of virtual sources. White noise and LFM signal were used as a source signals to examine the influence of the input signal. For the twin propellers, 5 transfer functions were defined and the results were discussed. Cavitation noise measurement tests were performed similarly to the transfer function measurement test. Noise source localization analysis was performed to confirm the test effectiveness. It was confirmed that the source level of the twin propeller can be estimated reliably by using transfer function corrections. Finally, the model test results were converted into full-scale by applying the ITTC '87 model-ship scaling raw, and the validity of the model test was confirmed by comparison with the full-scale measurement result.
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지능형선박연구본부 (함정공학연구센터)
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