|April 14, 2013, 22:33||
I want to predict the performance of the axial flow fan.
Join Date: Nov 2012
Posts: 6Rep Power: 4
I speak English a little.
Fan Specifications condition
Volume Flow rate : 36.8[m^3/s]
Total Pressure : 539[Pa] = 55[mmAq]
Static Prssure : 0[pa] = 0[mmAq]
Used motor : 50Hp = 37kw
RPM : 1760 rpm
1. What conditions are optimized conditions?
ex) Inlet : no.1 Outlet : No.4
2. I want to see the Total Pressure & Static Pressure efficiency.
ex) A. Pt[pa] =Outlet Lid Pt(SG av) - Inlet Lid Pt(SG av)
B. Ps[Pa]= Outlet Lid Ps(SG av) - Inlet Lid Pt(SG av)
↑↑↑↑ What is the exact official this?
C. Volume Flow[m^3/s] = Inlet Lid (SG av) Volume Flow
D. W = Impeller Torque * Rotating region
E. (C * A or B) / ( D ) = Efficiency?
It is really important to me.?
Last edited by Sanghyun - PARK; April 16, 2013 at 19:32.
|April 30, 2013, 04:31||
Join Date: Jul 2009
Posts: 382Rep Power: 12
It is not 100% clear to me what your problem is but I will try to help you.
1. The ideal boundary conditions for fan simulations are inlet volume/mass flow and outlet pressure. There is an example in the tutorials on an impeller. This model is a radial fan but the basic setup is the same. You can find it on page C5-1.
2. You can also find the right formula for this calculation in the tutorial (page C5-5)
Efficiency = (volume flow rate [m^3/s] * (Ps_outlet [Pa] - Ps_inlet [Pa]))/(torque [Nm] * rotating speed [rad/s])
I hope this helps,
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