PIV Measurement of Viscous Flow Field in the Wake of Transom Stern

Lee, Gyoung-Woo; Gim, Ok-Sok

Journal of Navigation and Port Research 2011;35(10):805-810.
Published online December 31, 2011.

PIV기법을 이용한 트랜섬 선미 후류 점성유동장 계측

이경우, 김옥석

PIV Measurement of Viscous Flow Field in the Wake of Transom Stern

Gyoung-Woo Lee, Ok-Sok Gim

Abstract

An experiment was carried out to figure out the instantaneous flow characteristics in the wake of the transom stern’s 2-dimensional section by 2-frame grey level cross correlation PIV method at Re= 3.5×103, Re= 7.0×103. The stern angles of models were learning at 45°(Model “A”), 90°(Model “B”) and 135°(Model “C”) respectively based on the survey results of real ships. The depth of wetted surface is 40㎜ from free surface. As Reynolds number increases, vortices increase in volume and move their way to the downstream. Flow separation appeared at the end of model’s bottom.

Key Words: Transom stern;PIV(Particle Image Velocimetry);Viscous flow;Vorticity field;Instantaneous flow field