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FW-H 방정식을 이용한 선박 추진기 날개통과주파수 소음의 수치예측과 모형시험 검증
설한신(Hanshin Seol),박철수(Cheolsoo Park),김기섭(Ki-Sup Kim) 한국소음진동공학회 2016 한국소음진동공학회 논문집 Vol.26 No.6
Underwater noise produced by ships has been becoming an increasing issue. A dominantly contributing noise source is a ship propeller. Therefore, it is important to predict the propeller noise at the propeller design stages. This study applied the acoustic analogy based on Ffowcs Williams equation for the prediction of the marine propeller BPF noise. A marine propeller BPF noise is investigated experimentally as well as numerically. Propeller BPF noise measurement and propeller cavitation observation tests are performed in the KRISO medium size cavitation tunnel. Numerical prediction schemes of marine propeller BPF noise are presented together with the noise measurement method. Propeller BPF noise predictions and experiments are performed under the various propeller operating conditions including non-cavitating and caveating conditions. Numerical and experimental results are compared and analyzed. It is shown that numerical prediction results are generally in good agreement with the measured data.
균일 유입류에서의 모형추진기 캐비테이션 소음특성 실험연구
설한신(Hanshin Seol) 한국소음진동공학회 2018 한국소음진동공학회 논문집 Vol.28 No.6
In this study, propeller cavitation and the resulting noise were analyzed experimentally in uniform inflow conditions. The propeller cavitation observation and noise measurements tests were conducted in the KRISO Large Cavitation Tunnel (LCT), with size 2.8 m (B) × 1.8 m (H) × 12.5 m (L). The test setup and conditions are introduced and the propeller noise test procedure is briefly described. To investigate the propeller cavitation and induced noise, propeller noise measurement tests were performed under various pressure and propeller loading conditions. Propeller noise results are presented along with the cavitation observation. The relation between the cavitation patterns and measured noise were analyzed.