Kupreyev V., Sukhorukov A., Chernetsov V.
The article investigates the motion of floating gate shutter that blocks a navigation pass due to flooding of ballast tanks. The software package Star-CD by Computational Dynamic, London is used to simulate viscous fluid. Comparative analysis of motion of a floating gate with the initial shape of a shutter cross-section and a shutter with an additional structural element (volume of flotation), that changes the flow structure when the object approaches the bottom and acts as a destroyer of large-scale vortex, was made. It is demonstrated that continuous oscillations of the shutter take place under a certain difference in fluid level (stability threshold). At the same time, the value of stability threshold of the additionally developed structure turns out to be much higher. The results presented make it possible to determine trends for increasing stability threshold.