|MadSci Network: Engineering|
Major factors to consider when estimating how much (room-temp/68F) air will be passing through a rotating (500 rpm) cylinder with 4 inch diameter and 2 inch height. A rotating ram air scoop end-positioned on the top plate/disc forces air down into cylinder body. Hood scoop has 3/4 inch height and 1-1/2 inch (1.5) width. Mouth of hood is rectangular. Slant angle of hood's air impacting plate is to be adjusted for maximum air flow. QUESTION: Best angle(s) to consider? A scoop with an appropriately-curved air impacting back-plate form is also feasible for application. In one desirable form, a similar but REVERSE facing/oppositely positioned air scavenging hood co-operates to pull slightly-compresed air that was forced into cylinder up and out of said cup-like body. QUESTION; To ESTIMATE (say +/-10%) air flow, velocities, and pressures, what are the most important factors I must include? QUESTION; What is the most simple/straight-forward formula I can use to estimate air flow rate, pressures, velocities? QUESTION; If the scavenging/reverse-pointing hood is removed and a 3/4 by 1 1/2 inch HOLE in the cylinder's end plate substitutes, are calculations/variables greatly simplified? What does formula then become? Lastly, cylinder end opposite scoop and exhaust opening is closed. PLEASE help.
Re: How to estimate air flow &velocity thru a rotating ram air scoop
Try the links in the MadSci Library for more information on Engineering.