Laminar vortex pump system

摘要: Streamwise ridges on a lifting wing intercept local flow consisting of free stream and spanwise crossflow to create pattern vortices over the aligned with ridge axes; act as suction pumps collecting low energy boundary layer fluid, ingesting such fluid into core vortices, transporting it in streamwise direction, discharging wake. Fresh from outer, replaces spent withdrawn by vortex array. This produces favorable pressure gradient that maintains laminarity, avoiding onset transition leading turbulence. The also suppresses separation back side wing, where is normally positive adverse. accelerations resulting an order magnitude greater than usual produced shape friction effective Reynolds' number dominating corresponding laminar flow. Close spacing maximizes interception Each asymmetric cross-section gentle ramp its windward steep bluff lee generate standing between two consecutive ridges. A slight inclination respect direction at least aft wing's maximum thickness taps augment acceleration crossflow.