what is formula between air flue and air reveloution per minute(rpm)

[soheil1979]

hi
i have a fan that i dont have a revloution per minute(rpm) but air velocity blow between its vane is X km/h and air flue is Y m3/h.if there is relation to find rpm please guide me.

 

[zerosum]

Axial or centrifugal? There are several configurations of each, with substantially varying flow characteristics.

You don't have the manufacturer's curves/tables?

Do you know the static pressure (SP)?

For a given installation, the outlet velocity (km/h) and the flow quantity (m3/h) are directly proportional (fan output typically assumed incompressible), so you really only have one parameter so far, not enough information.

 

[soheil1979]

hi
mant thanks for your answer.i have a horse power of fan and my vane is axial.i have just these 2 items.please guide me.

 

[zerosum]

Why wouldn't you use a strobe to measure the RPM directly, if that is all you are after?

 

[pmover]

soheil1979,

it is best to contact the OEM (equipment manufacturer) and obtain the requested information from them. we simply cannot help you . . . without more information.

good luck!
-pmover