[MNMK]

Hi everybody,

I simulated a radial fan with 10 blades. I calculated the Torque in Blades. I would like to know how can I calculate the efficieny of the fan??. I use an equation as mentioned below to calculate the efficieny but I am not sure whether the units of the parameters are correct. Because the answer are not logical. sometimes 0,2 sometimes 200

Eff=( Q*Dptotal)/(Omega*Torque)
Q=m³/s
Dptotal= Pa or N/m²
Omega= 1/s
Torque= N.m

Best wishes

[shk09]

i have same question as of today... if you've found the anser, please share.. thankyou

[MNMK]

Originally Posted by shk09

i have same question as of today... if you've found the anser, please share.. thankyou

Dear shk09,

I have calculated the efficiency by the same equation but with the below units:

Eff=( Q*Dptotal)/(Omega*Torque)
Q=m³/s
Dptotal= Pa or N/m²
Omega= rad/s
Torque= N.m

I can say that I have a reasonable efficiency value. But please verify this Equation through your results.

I hope I could give you the right answer.

regards,