풍동에서 열선유속계를 이용한 선미주위 점성유동의 실험적 연구

Experimental Study on Viscous Flows over Ship Sterns by Using the Hot-wire Anemometer in the Wind-tunnel

Three-dimensional turbulent flows over ship sterns are measured by using the hot-wire anemometer and static holes in the wind tunnel. A conventional stern and a barge-type stern are adopted for the present study. Three components of mean velocities, pressures on the hull and six components of Reynolds stresses are measured. Longitudinal velocity contours are more parallel to the hull surface and weak bilge vortices appear on the barges type stern rather than the conventional stern. Those viscous flow patterns may have close relations to improvements of the resistance and propulsion performance, which have been verified in the towing tests. Measured data files are valuable for the ensuing numerical studies.