marksummers
Mechanical
I am looking for some help with what seems to be a simple engineer fluid dynamics problem.
I have a pressurized electronics rack with a 550 cfm exhaust fan mounted on the top, exhausting to atmospheric pressure. My customer wants to know how much "non-obstruction area" is required above the rack to prevent a reduction in the exhaust flow.
Obviously, an obstruction at even a long distance away will theoretically obstruct the flow, so my approach was to determine the air flow velocity as a function of height above the rack. Assuming the fan can provide 550 cfm and the fan opening is 12" diameter, any thoughts on how to develop a flow velocity profile?
I have a pressurized electronics rack with a 550 cfm exhaust fan mounted on the top, exhausting to atmospheric pressure. My customer wants to know how much "non-obstruction area" is required above the rack to prevent a reduction in the exhaust flow.
Obviously, an obstruction at even a long distance away will theoretically obstruct the flow, so my approach was to determine the air flow velocity as a function of height above the rack. Assuming the fan can provide 550 cfm and the fan opening is 12" diameter, any thoughts on how to develop a flow velocity profile?