Control Effects of the Hydrodynamic Force of the Submerged NACA0018 arranging in a Row in a Uniform Stream

Gim, Ok-Sok; Shon, Chang-Bae; Lee, Gyoung-Woo

Journal of Navigation and Port Research 2010;34(5):325-330.
Published online June 30, 2010.

균일흐름 중에 놓인 병렬구조를 가진 몰수형 NACA0018의 간격변화가 유체력 제어효과에 미치는 영향

김옥석, 손창배, 이경우

Control Effects of the Hydrodynamic Force of the Submerged NACA0018 arranging in a Row in a Uniform Stream

Ok-Sok Gim, Chang-Bae Shon, Gyoung-Woo Lee

Abstract

An open water rudder test was carried out to figure out the flow characteristics around a twin rudder at Re= 1.5×104. In the analysis, the unique characteristics of a twin rudder, which affects rudder forces, were explained. The analysis includes varying angles of attack from 10 to 30 degrees. In this paper, the measured results have been compared with each other to predict the performance characteristics of a twin rudder's 2-dimensional section by 2-frame grey level cross correlation PIV method. The length L=0.75C between upper and lower rudders could be defined as the critical length.

Key Words: Twin rudder;Special rudder;Flow characteristics;Kinetic energy;Particle Image Velocimetry(PIV)