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DuctExtractBranch90B_CL

Returns the pressure drop associated with an extract duct with a branch.  The branch is at 90 degrees and the ducts have circular cross-section.  The pressure drop should be applied to the flow from the branch.  The function uses the information from the Lindab website.

DELTAP = DuctExtractBranch90B_CL(F$, v_3, v_1, T, P)

Inputs:

F$:  fluid string identifier

v_3:  velocity in main duct upstream of branch (m/s, ft/s)

v_1:  velocity in branch (m/s, ft/s)

T:  inlet temperature (K, C, F, or R)

P:  inlet pressure (bar, atm, Pa, kPa, or MPa)

Output:

DELTAP:  pressure drop (bar, atm, Pa kPa, or MPa)

Example: 

$Load Component Library

$UnitSystem SI Mass kJ C Pa

$VarInfo DP Units='Pa'

F$ = 'Air'

T =  20 [C]

P = 100000 [Pa]

v_3 = 8 [m/s]

v_1 = 8 [m/s]

DP = DuctExtractBranch90B_CL(F$, v_3, v_1, T, P)

{Solution:

DP = 38.49 [Pa]}