Anonymous

I don't know the answer but I would guess that this is improbable. The only way for it to improve the air flow is if the shear friction between the air and the walls can be reduced. Now if you consider a fluid which is capable of movement it can easily act like a flag or a surface of water. Under the effect of the moving air it starts to get roughened with a sinusoidal surface. No matter how slight this might be at our macro scale this would create a level of turbulence and increase the shear friction. Of course someone might KNOW the answer. I would be more inclined to look at surface treatments. Mirror polishing a surface. Possibly a plated or painted surface of some type. But still solid. Not a lubricant as such.

Anonymous

Possible

Anonymous

No lubricant is required for airlines as the internal surfaces are already smooth to minimise turbulence. Attachments with moving parts will generally require lubrication of cousre.

Anonymous

Consider conservation of mass, if no mass accumulates inside the passage way the same amount of mass that enters has to leave at the same rate no matter what the friction might be. For an incompressible fluid that means if the passage way is a constant diameter the velocity doesn't change, again no matter what the friction is. The pressure differential will be different for more friction though but the velocity has to remain the same. For a compressible fluid flow you can get a higher velocity at the outlet with a smoother surface, but lubrication fluid and air would "stick" together more than a solid polished metal and air.

Anonymous

Any lubricant on the surface would likely increase the drag.Unless you mean a solid like Teflon.