Reduced flow resistance by a surface, having reduced wall shearing stress, of a body over which a fluid flows in a turbulent manner

摘要

The surface of a body over which a fluid flows in a turbulent manner has a reduced flow resistance due to reduced wall shearing stress. It has channels which run in the flow direction and are separated from one another by sharp-edged ribs (5). The ribs (5) are provided in a multiplicity of lines (9, 10, etc.). Each rib line (9, 10) consists of a multiplicity of ribs (5) arranged next to one another at a distance apart transversely or obliquely to the flow direction. The ribs of rib lines (9, 10) following one another in the flow direction (3) are staggered laterally relative to the flow direction. The ribs of the individual rib lines extend a short distance in the flow direction (3). IMAGE