Air velosity
Air velosity
(OP)
This is probably a "duh" question, but I can't focus on it. I am pushing 24,000 cubic feet of air through a 48" diameter duct. Will someone please give me the formula for estimating the speed in miles per hour? Air to duct friction loss does not have to be considered because it is not neccesary the answer be that exact.
Any help will be greatly appreciated,
Russell
Any help will be greatly appreciated,
Russell





RE: Air velosity
Just divide the volume by the area
TTFN
RE: Air velosity
????
The flow rate of the 24000 cubic feet that you identified is most likely CFM (cubic feet per minute)
AS IRStuff had mentioned : divide CFM by area = velocity (ft per minute)
RE: Air velosity
RE: Air velosity
24,000 cfm / 12.55 ft^2 = 1910 ft/min = 21.7 mph
1910 ft ~ 2/5 mi
2/5 mi * 60 min/hr ~ 24 mph
TTFN
RE: Air velosity
Russell
RE: Air velosity