A Study on the Characteristics of the Flow around a Sunken Vessel

J. Ocean Eng. Technol. 2000;14(4):9-16.

침선어초 주위의 유동특성에 관한 연구

양찬규,김현주

한국해양연구소 선박해양공학분소,한국해양연구소 선박해양공학분소

Keywords: Sunken vessel, CFD code, Finite volume method, Standard $kappa$-$varepsilon$ model, Circulating water channel, Particle image velocimetry technique, Two axis load cell

핵심용어: 침선어초, 전산유체 프로그램, 유한체적법, 표준형$kappa$-$varepsilon$ 모형, 회류수조, 입자영상 유속계측기술, 2방향 분력계

Abstract

This paper deals with the numerical and experimental study on the characteristics of the flow around a sunken vessel. Numerical simulation of the two dimensional steady flow on the midship section are carried out by the CFD code which is developed by using finite volume method and which includes the standard $textsc{k}$-$varepsilon$ model with standard wall function. A experimental study is also carried out for the 1/100 scale model in circulating water channel. A velocity fields around the ship are measuremed by using particle image velocimetry technique. And the fluid forces acting on the ship hull by uniform current are measured by two axis load cell. The computed and measured velocity fields on the midship section are compared with each other in the view point of velocity dstribution and reattachement length, which shows good agreement in quality. The drag force on the vessel also showed the same tendency in both computational and experimental results. However, the quantitative disagreements are shown due to the three dimensional effect of the experiment. The result are used to determine the functional efficiency and stability of the vessel as a artificial reef.