Hydrodynamics
:smile:Have you tried Poiseuille's law? Does this sound familiar - the total volume of liquid which flows across the entire cross-section of a cylindrical tube in time? See link http://en.wikipedia.org/wiki/Poiseuille's_law
"You will have some windage off the shaft, but those flows at only 3000 rpm should be very small. The delta P across your gap would be the more dominant I would think.
Just be careful with this gap. If your shaft has any imbalance, it will wobble on you. 10mm a side is not much space to take...
When designing tubes and creating drawings there needs to be a starting point for the tube where everything begins. So, if you look at your tubing run end (doesn't matter which end) as the beginning of it's own universe where the center of the tube at that point has no value, the point would be...
"...What forces of the rotating shaft are you referring? Why would these forces have any impact on the flow rate through the opening. Your description makes me believe that there is no way the shaft can influence anything in that area."
The reason I brought up the forces from the shaft is...
Why not just go to your Machinery's Handbook or if you have Marks' Standard Handbook for Mechanical Engineers that would be a start. Just viewing the Chart you supplied, the first point is the starting point of your tube while the following are the intersection points of the bends (just assuming...
I am unsure of where to begin to solve for my problem since I have no experience with rotating equipment. I have a 280mm rotating shaft @3000 RPM running thru a flat plate 45mm thick with a 300mm dianeter opening for the shaft. Being at sea level the one side has air pressure ratio of 1.000...