PASSIVE FLOW CONTROL MECHANISM FOR SUPPRESSING TOLLMIEN-SCHLICHTING WAVES, DELAYING TRANSITION TO TURBULENCE AND REDUCING DRAG

摘要

A body adapted for relative movement with respect to a fluid, said movement creating a flow of fluid with respect to the body in a relative flow direction, said body having at least one surface with a surface profile exposed to the fluid and comprising at least one smooth step facing in relative flow direction towards the flow, said step having a height between 4% and 30% of the local boundary layer thickness (δ₉₉) of the fluid contacting the body in the vicinity of the step.