METHOD AND DEVICE OF REDUCING FLUIDITY RESISTANCE

摘要

PROBLEM TO BE SOLVED: To provide a method and device of reducing fluidity resistance which can reduce the friction resistance of a fluid by forming irregularity on the surface of an object and can maintain the performance for a long period of time. SOLUTION: A porous layer 2 is provided on a surface of an object 1 like a pipe on which the fluid flows. The surface is divided into a plurality of sections so as to form a lattice frame part 3 in which air chambers are defined. Lattices of several ten to several hundred micrometers are arrayed in the lattice frame part 3. When air A is press-fed to the porous layer 2 from one side thereof, the air is supplied into the air chambers 6 from lower openings 5 of the air chambers 6 defined by the lattices. The fluidity resistance of the fluid flowing on the surface is reduced by the air within the air chambers 6. Even if the air is taken away by the fluid, air is further supplied from the openings 5 so that the effect of reducing the fluidity resistance can be maintained for a long period of time. COPYRIGHT: (C)2005,JPO&NCIPI