초록 ▼

A surface for contact with a fluid, flowing in a flow direction (A) over the surface, is provided with grooves (1) to prevent flow separations at low, local Reynolds numbers. The grooves extend between an upstream-directed, closed groove entrance and a downstream-directed, open groove exit and are i

A surface for contact with a fluid, flowing in a flow direction (A) over the surface, is provided with grooves (1) to prevent flow separations at low, local Reynolds numbers. The grooves extend between an upstream-directed, closed groove entrance and a downstream-directed, open groove exit and are inclined to the flow direction (A), at least in the vicinity of the groove entrance.

대표청구항 ▼

[ What is claimed is:] [1.] A method for avoiding separation between a fluid flowing in laminar flow along a solid surface and the solid surface and for reducing frictional resistance between the fluid and the surface, the method comprising the steps ofproviding the surface with a plurality of subst

[ What is claimed is:] [1.] A method for avoiding separation between a fluid flowing in laminar flow along a solid surface and the solid surface and for reducing frictional resistance between the fluid and the surface, the method comprising the steps ofproviding the surface with a plurality of substantially parallel grooves each groove having a length, a depth and a width wherein the length is larger than the depth and larger than the width, each groove being substantially linear along its length and having a closed end at one end of the length and an open end at an opposite end of the length, andorienting the plurality of grooves relative to the laminar flow such that the grooves are oblique to the flow direction with the closed ends at upstream ends of the grooves and open ends at downstream ends of the grooves.