T-MATS: Duct Library Block
This block simulates the performance of a duct using basic fluid dynamic equations and properties.

Duct Inputs:

Duct Input	Description
GasPthCharIn	Gas Path Characteristics Input, 5x1 vector consisting of: - W - gas path flow [pps] - ht - enthalpy [BTU/lbm] - Tt - Total Temperature [degR] - Pt - Total Pressure [psia] - FARc - Combusted Fuel to Air Ratio [frac]

Duct Outputs:

Duct Output	Description
GasPthCharOut	Gas Path Characteristics Output, 5x1 vector consisting of: - W - gas path flow [pps] - ht - enthalpy [BTU/lbm] - Tt - Total Temperature [degR] - Pt - Total Pressure [psia] - FARc - Combusted Fuel to Air Ratio [frac]

Duct Mask Variables:

Duct Mask Variable	Description
dP_M	Delta Pressure [frac lost]