Subsea Pipeline Stability in Various Trench Sections

초록

To verify the stability in various trench, the experiment was conducted with the advanced PIV(Particla Image Velocimeter) technology. The circular cylinder model for pipeline is fixed in trench section at various trench depths and slopes. Four different velocities of current are generated at the circulating water channel. The velocities around the cylinder are mesured and recordedEven the current is at constant velocity, there are cyclic circular motions created arround the cylinder. The horizontal and vertical velocities in front and back of the cylinder are ivestigated at each current condition. The results show that the trench depth and slope influence greatly on pipeline stability.