프로펠러 설계 및 선미 부가물 수정에 따른 캐비테이션 초기발생 선속(CIS) 성능 향상 연구

• Published in: 大韓造船學會 論文集 Vol. 60; no. 4; pp. 231 - 239
• Main Authors: 안종우(Jong-Woo Ahn), 김건도(Gun-Do Kim), 백부근(Bu-Geun Paik), 박영하(Young-Ha Park), 설한신(Han-Shin Seol)
• Format: Journal Article
• Language: Korean
• Published: 대한조선학회 2023
• Subjects: 조선공학; Large Cavitation Tunnel(LCT, 대형캐비테이션터널); Cavitation Inception Speed(CIS, 캐비테이션 초기발생 선속); Propeller design(프로펠러 설계); Propeller cavitation(프로펠러 캐비테이션); Appendage modification(부가물 수정); V-Strut(V-스트럿); V
• ISSN: 1225-1143; 2287-7355
• DOI: 10.3744/SNAK.2023.60.4.231

In order to improve the propeller Cavitation Inception Speed (CIS) performance, it needs to modify the propeller geometry and the wake distribution that flows into the propeller. In the previous study, the twisted angles of the V-strut were modified to improve propeller CIS, cavitation behavior and pressure fluctuation performances. Then the propeller behind the modified V-strut (New strut) showed better cavitation characteristics than that behind the existing V-strut (Old strut). However, the CIS of Suction Side Tip Vortex (SSTV) and Pressure Side Tp Vortex (PSTV) showed a big difference at behind each V-strut. In this study, the balance design is conducted to minimize the difference between SSTV CIS and PSTV CIS at behind each V-strut. To improve the propeller CIS performance, 1 propeller is designed at behind the old strut and 3 propellers are designed at behind the new strut. The propeller CIS is increased through the balance design and the stern appendage modification. The final propeller CIS is increased about 5.3 knots higher than that of the existing propeller at behind the old strut. On the basis of the present study, it is thought that the better improvement method for the propeller CIS would be suggested.