Boundary Layer Controls TRIZ Cases

Uniform micropillars with diverging tips shrink and shift the separation bubble downstream to cut drag, aerodynamic noise, and vibration.

Upstream-bent porous plate edges weaken shear layers and vortex noise around aircraft flow paths, improving broadband noise reduction.

Multiple laser intensity maxima create parallel grooves that form riblets, improving surface flow resistance reduction with simpler processing.

Alternating smooth regions with partially submerged riblets cuts viscous and pressure drag while delaying turbulent flow separation.

Sinusoidal ridges near a wing leading edge suppress crossflow instability, delay turbulence transition, and reduce viscous frictional drag.

Measured surface characteristics guide light irradiation to form riblet structures accurately while preserving coating durability and reducing friction.

Multiple independently adjusted processing lights reshape irradiation areas to improve thickness control and material removal accuracy.

Angled reflective surfaces inside a cavity redirect acoustic waves away from the leading-edge shear layer to break resonance and reduce noise.

A redetachable positioning film with alignment aids speeds precise riblet film placement on flow-exposed surfaces and cuts vehicle downtime.

Varying riblet height and width by flow angle cuts pressure and friction drag while enabling acute tips without extra cutting.

Multiple processing lights with adjustable intensity distribution improve surface thinning or removal accuracy without overly complex optics.

Processing light shapes riblet structures in a coating layer, cutting fluid resistance on large or complex surfaces without moving the object.

Coherent laser interference patterns form sharp riblets directly on painted surfaces at high speed, enabling economical large-area drag reduction.

Depressed periodic riblets cut pressure and friction drag without adding wetted area, improving range and propulsion efficiency.

Intermittent plasma or fluid-jet actuation adjusts local flow in real time to control surface drag while reducing continuous energy use.

Arrayed fixed or rotatable arc protrusions cut high-speed fluid resistance, friction, noise, and vibration while improving flow rectification.

Micropillars with diverging tips shrink and shift the separation bubble downstream, cutting drag, aerodynamic noise, and vibration.

Sequential floating conductor pairs create multiple discharge zones that raise induced flow velocity while limiting power use and flow cross-talk.

A floating conductor pair creates dielectric barrier discharge at multiple points to boost induced flow velocity while limiting electrode cross-talk.