FIELD: machine building.
SUBSTANCE: downcomer contains input and main sections with walls limited by surfaces of rotation. Walls of input and main sections are provided with internal superhydrophobic film coating. Wall of the main section is made in form of connected power mesh and internal superhydrophobic film with system of microholes. Axes of the microholes make with the pipe axis directed from input section to output of the main section the angle from 90 to 160 degrees.
EFFECT: reduced lifting force.
2 cl, 3 dwg
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