불규칙 파랑 중 카페리선의 SRtP 소요마력 수치 추정 연구

• Published in: Han-guk haeyang gonghak hoeji (Online) Vol. 33; no. 1; pp. 1 - 9
• Main Authors: 박일룡(Il-Ryong Park), 김제인(Je-in Kim), 서성부(Sung-Bu Suh), 김진(Jin Kim), 김광수(Kwang-Soo Kim), 김유철(Yoo-Chul Kim)
• Format: Journal Article
• Language: Korean
• Published: 한국해양공학회 2019
• Subjects: 해양공학; Flooding condition 침수상태; SRtP 안전귀항; Irregular wave 불규칙파; Damaged condition 손상상태; Self-propulsion 자항; CFD 전산유체역학
• ISSN: 1225-0767; 2287-6715
• DOI: 10.26748/KSOE.2018.092

This paper considers a numerical assessment of the self-propulsion performance of a damaged ferry carrying cars in irregular waves. Computational fluid dynamics(CFD) simulations were performed to see whether the ferry complied with the Safe Return to Port (SRtP) regulations of Lloyd's register, which require that damaged passenger ships should be able to return to port with a speed of 6 knots (3.09 m/s) in Beaufort 8 sea conditions. Two situations were considered for the damaged conditions, i.e., 1) the portside propeller was blocked but the engine room was not flooded and 2) the portside propeller was blocked and one engine room was flooded. The self-propulsion results for the car ferry in intact condition and in the damaged conditions were assessed as follows. First, we validated that the portside propeller was blocked in calm water based on the available experimental results provided by KRISO. The active thrust of starboard propeller with the portside propeller blocked was calculated in Beaufort 8 sea conditions, and the results were compared with the experimental results provided by MARIN, and there was reasonable agreement. The thrust provided by the propeller and the brake horsepower (BHP) with one engine room flooded were compared with the values when the engine room was not flooded. The numerical results were compared with the maximum thrust of the propeller and the maximum brake horse power of the engine to determine whether the damaged car ferry could attain a speed of 6 knots(3.09 m/s).