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Influence of Internal Flow on the Spatial Form of Flexible Hose in the Deep Sea Mining System
Author(s): 
Pages: 81-86
Year: Issue:  1
Journal: Ocean Technology

Keyword:  deep-sea miningflexible hosespatial Forminfluencing factors;
Abstract: With decreasing land resources of States, the focus of international competition has gradually shifted to the strategic resources in the sea. Currently, deep-sea mining resources have become an important strategic target. The hose of deep-sea mining system is an essential part of connected to relay buffer and mining machine.It is restricted by the mechanical properties, seabed topography and mining technology. Because of the complex spatial form, its requirements of transportation technology and parameter matching are more stringent. This paper analyzes the hose’s morphological dynamic characteristics and laws under different working conditions based on the simulation system of flexible hose of deep-sea mining. The results show that moving distance of mining machine, internal flow rate and internal characteristics are the main influencing factors of the hose spatial form.When the dome height is not limited by the surface height of water, the increases of the moving distance of mining machine and internal flow rate make the angle of the hose show a linear growth trend. The hose spatial form with slurry flow has a same variation trend with the water, but the hose dome height is less than the water.The main reason is that the slurry density is much greater than that of the water, and the growth of fluid gravity rises faster than the growth of vertical momentum. Both sides of the hose are droop more apparent than the water.It can provide research foundation for optimizing the transportation parameters of deep-sea mining system based on the research on the morphologic laws of hose and internal mechanism.
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