CFD를 이용한 KRISO 추진효율 향상 장치(K-duct)의 성능 해석

• Published in: Han-guk haeyang gonghak hoeji (Online) Vol. 31; no. 3; pp. 183 - 188
• Main Author: 서성부(Sung-Bu Suh)
• Format: Journal Article
• Language: Korean
• Published: 한국해양공학회 2017
• Subjects: 해양공학; CFD; 에너지 절감 장치; 전산유체역학; RANS method; RANS기법; 추진효율; 자항; Propulsion efficiency; 추진효율 향상 장치; Energy saving device; Self-propulsion; K-duct KRISO; RANS
• ISSN: 1225-0767; 2287-6715
• DOI: 10.5574/KSOE.2017.31.3.183

This paper provides numerical results for the estimation of the efficiency of KRISO energy saving devices in the design stage. A finite volume method is used to solve Reynolds averaged Navier-Stokes (RANS) equations, where the SST k-$\omega$ model is selected for turbulence closure. The propeller rotating motion is determined using a rigid body motion (RBM) scheme, which is called a sliding mesh technique. The numerical analysis focuses on predicting the power reduction by the designed KRISO devices (K-DUCT) under a self-propulsion condition. The present numerical results show good agreement with the available experimental data. Finally, it is concluded that CFD can be a useful method, along with model tests, for assessing the performance of energy saving devices for propulsion efficiency improvement.