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
- 박철수; 김건도; 임근태; 박영하; 장현길; 장영훈
- 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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