English to Russian Science Science (general) patents, aerodynamic

The resulting bluff-base wake-flow structure emanating from the base area of the vehicle is comprised of the vortex structures that are shed from trailing edges of the side surfaces and top surface of the vehicle. Contributing to the low-energy bluff-base wake is the low-energy turbulent flow that exits from the vehicle undercarriage at the base of the vehicle. The unsteady wake flow imparts a low pressure onto the aft facing surface of the trailer base that results in significant aerodynamic drag. Prior art has addressed these flow phenomena by adding to the bluff base; a pre-defined aerodynamic surface referred to as a boat-tail fairings, surfaces and plates that create a cavity, and surfaces and plates that trap the vortices shed from the trailing edges. Prior art also show the forcing the side surface and top surface flow into the base region through the use of turning vanes or jets of air.