Hi all
So, i am trying to upgrade my 3D printer fans, to quieter fans that still push roughly the same amount of air.
This is all experimental really, i'm just trying to have abit of fun whilst learning something.
I bought an anemometer which measures air flow.
I measure the air flow by putting the anemometer against the fan and the measurement is in ft / min.
I then input the number into this calculator
https://www.engineering.com/calculators/airflow.htm
and put in the fan size which converts it into a number of other measurements.
Problem is I am testing it out on a fan I bought which is rated to 16CFM, to check the calculations are correct, but I don't think its being converted properly.
The highest value I get is 2153 ft/min, with a 60mm fan, the calculator gives me 262.1 CFM which is far too high, so I put that number into the calculator and square root it, and I get 16.1, i'm not sure if there us a way to find the cubed root?
I've googled a bit and it hasn't been really helpful tbh.
Should I hold the anemometer a set distance from the fa, maybe use a tube so all air is directed to the measuring device?
Does anyone have any ideas?
Cheers
So, i am trying to upgrade my 3D printer fans, to quieter fans that still push roughly the same amount of air.
This is all experimental really, i'm just trying to have abit of fun whilst learning something.
I bought an anemometer which measures air flow.
I measure the air flow by putting the anemometer against the fan and the measurement is in ft / min.
I then input the number into this calculator
https://www.engineering.com/calculators/airflow.htm
and put in the fan size which converts it into a number of other measurements.
Problem is I am testing it out on a fan I bought which is rated to 16CFM, to check the calculations are correct, but I don't think its being converted properly.
The highest value I get is 2153 ft/min, with a 60mm fan, the calculator gives me 262.1 CFM which is far too high, so I put that number into the calculator and square root it, and I get 16.1, i'm not sure if there us a way to find the cubed root?
I've googled a bit and it hasn't been really helpful tbh.
Should I hold the anemometer a set distance from the fa, maybe use a tube so all air is directed to the measuring device?
Does anyone have any ideas?
Cheers
That was biggest problem in SPCR article .. that and not accurately determining the airflow area of fan and their anemometer (they had area of fan & anemometer hub as part of airflow area). I don't know why their straw air straigher didn't work, probably because to straighten airflow only takes inch long or shorter pieces of stray. SPCR did good detailed testing procedure .. something most review sites don't do. Corsair has a 1meter long clear acrylic tube 6" OD with 2 pieces of 10mm spacing woven wire mesh (small diameter wire) place 50cm and 100cm from exhaust end to straighten airflow. Seems to work, but I would want a bigger tube. Their 5.75" ID is 146mm ID for 140mm fan is only 6mm bigger than 140mm fan, so likey to restrict airflow some, while it is 26mm bigger than 120mm fan so probably won't restrict flow. I would use 8inch / 200mm OD tubing which is 194mm ID so not as likey to restrict the airflow of 140mm fans. I want to make one, just haven't had the time or money.