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fan speed
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Dear convert-me.com forum visitors,
Our forum has been available for many years. In September 2014 we decided to switch it to read-only mode. Month after month we saw less posts with questions and answers from real people and more spam posts. We were spending more and more resources cleaning the spam until there were less them 1 legitimate message per 100 spam posts. Then we decided it's time to stop.
All the posts in the forum will be available and searchable. We understand there are a lot of useful information and we aren't going to remove anything. As for the new questions, you can always ask them on convert-me.com FaceBook page
Thank you for being with us and sorry for any inconveniences this could caused.
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Re: fan speed
by Guest » Sun May 08, 2005 8:56 am
Craig wrote:I have a fan 48 inches in diameter and does 20,000cfm what is that in meters per second
The area of the fan is (pi/4)*(4 ft)^2 = 12.57 sq. ft
If we assume the flow is uniform across the fan opening,
the average velocity is 20000 cfm/12.57 sq. ft. x 1 min/60 s = 26.53 ft/sec
Since 1 foot - 0.3048 m, this is 8.1 m/s
- Guest
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