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Diffuser1_CL

 

 

Diffuser model with a specified efficiency.  

 

Inputs:

h_in:  inlet enthalpy (J/kg, kJ/kg, or Btu/lbm)

P_in:  inlet pressure (bar, atm, Pa, kPa, MPa)

Vel_in:  inlet velocity (m/s, ft/s)

Vel_out: outlet velocity (m/s, ft/s)

F$:  fluid string identifier

eta:  efficiency of diffuser

 

Outputs:

h_out:  outlet enthalpy (J/kg, kJ/kg, or Btu/lbm)

P_out:  outlet pressure (bar, atm, Pa, kPa, MPa)

C_P:  pressure recovery coefficient (-); defined as the actual pressure rise to the ideal pressure rise that would be obtained in an isentropic diffuser with infinite area ratio

 

Example: 

$Load Component Library

$UnitSystem SI Mass J K Pa

F$='Air'

T_in=300 [K]

P_in=1e5 [Pa]

h_in=enthalpy(F$,T=T_in)

Vel_in=200 [m/s]

Vel_out=50 [m/s]

eta=0.7

Call diffuser1_cl(h_in, P_in, Vel_in, Vel_out, F$, eta: h_out, P_out, C_P)

 

{Solution:

h_out = 319180 [J/kg]

P_out = 116494 [Pa]

C_P = 0.6529}

 

 

Index