대형 캐비테이션터널에서 펌프젯 추진기 단독성능 시험 및 해석 기법 연구

• Published in: 大韓造船學會 論文集 Vol. 59; no. 3; pp. 149 - 156
• Main Authors: 안종우(Jong-Woo Ahn), 설한신(Han-Shin Seol), 정홍석(Hong-Seok Jung), 박영하(Young-Ha Park)
• Format: Journal Article
• Language: Korean
• Published: 대한조선학회 2022
• Subjects: 조선공학; Large Cavitation Tunnel(LCT, 대형캐비테이션터널); Duct & Pumpjet open-water test(펌프젯 단독시험); stator sensor(덕트 및 스테이터 센서); Pumpjet propulsor(펌프젯 추진기); Reverse POW(역방향 단독시험)
• ISSN: 1225-1143; 2287-7355
• DOI: 10.3744/SNAK.2022.59.3.149

In order to study the open-water test and analysis techniques for pumpjet propulsors in the Large Cavitation Tunnel (LCT), at the Korea Research Institute of Ships and Ocean Engineering, a set of test equipment was designed and manufactured. The pumpjet propulsor is composed of rotor, stator and duct resulting in the strong interaction between the components. A ring-shaped sensor was developed to measure the thrust and torque for duct and stator. The test equipment including the pumpjet is installed on an existing POW dynamometer in the reverse direction. The results from the reverse POW test setup were validated against those from the conventional POW test setup in the Towing Tank (TT) as well as in the LCT. The pumpjet open-water test was conducted at the Reynolds number of around 1.0×106, at which the obtained experimental data became stable in the Reynolds number effect test. The open-water test for the rotor (rotor-only) was conducted to study whether the duct and stator should be considered as a part of the hull or the propulsor. On the basis of the test results, it was shown that the duct and stator could be included in the propulsor. The total thrust, combined thrust of rotor, duct, and stator was used for the pumpjet open-water test analysis. As the whole pumpjet is defined as a propulsor, it is thought that the self-propulsion test and analysis could be conducted in the same way as that of the conventional propeller.