Your kidding right?
Maybe you guys can go explain to the tafe teachers your theory.
Done my trade and have been a tradesman for 10 years now.
This theory is valid on N/A
Ask your self this question why are golf balls not all smoothed they have all little holes all over them.
A golf ball that will be smooth all over wont travel as far a as the turbulent ball.
Thats all i have to say.
The dimples on the golf ball provide two effects, they increase Magnus Lift, and they increase Induced Drag. In practical terms this means:
1. They make the ball travel further due to an increase in Magnus Lift. A driven golf ball has backspin. Backspin causes lift. A back spinning smooth ball experiences less lift than a back spinning dimpled ball. This makes the ball increase in height during the initial part of its trajectory, extra height means more air time, which means a longer drive. As the ball travels further its spin slows due to the friction of the air and the lift decreases accordingly, as does the drag, meaning the dimples have less effect in the later part of the trajectory.
2. This is the same reason you have to drive very precisely as any side spin has an amplified effect and this is what makes the game of golf such a futile pursuit.
I cannot see how any of this relates to a very spurious comment about turbulent flow in an intake. Any turbulence is caused by parasite drag (ie form drag and interference drag). These are caused by any disruption to smooth laminar flow and a breakdown of a boundary layer against a solid surface. Any disruption to flow would decrease volumetric efficiency and hence power and fuel efficiency.
The reason intake tubing connectors are ribbed is because they need to be flexible to stop transmission of engine vibrations and noise to the shell of the vehicle. If they are flexible they will deform under vacuum, if the ribs are perpendicular to the flow it ensures no deformation takes place, whilst maintaining flexibility in the plains needed.
In short they are cheap effective solution with minimal relative drawback.
L8r