DEVICE FOR ACTION ON BOUNDARY LAYER NEAR SURFACE OF FLYING VEHICLE OR WATERCRAFT Russian patent published in 2005 - IPC

FIELD: control of flying vehicle boundary layer.

SUBSTANCE: proposed device has layer of active material located on outer skin of flying vehicle and intended for generation of mechanical vibrations. Novelty of invention consists in availability of current-conducting film applied over layer of piezo-active material by spraying or painting. Piezo-active material is applied on surface of outer metal skin of flying vehicle. Located on surface of current-conducting film are sensors of parameters of turbulent motions of flow whose signals are used for control of mechanical vibrations of piezo-active material in phase or in anti-phase relative to vibrations in boundary layer. Layer of piezo-active material may be made from piezo-ceramics. Layer of piezo-active material may be polarized at angle 135 deg. for compensation for turbulence and at angle of 45 deg. for reduction of effect of break-down of flow.

EFFECT: enhanced economical efficiency.

3 cl