gsphelp  Common gas path component elements

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gsphelp  Common gas path component elements

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GSP gas path component models are the primary building blocks for gas turbine models. Most of the gas path component represent a stage in the gas turbine thermodynamic cycle, such as Inlet, Compressor, Combustor and Turbine subsequently for a simple cycle single spool gas turbine. With these components stacked together, only the addition of a Manual fuel controller is then required to complete the model for a simple jet engine like in the TJET.MXL project used in the quick start basics tutorial.

In all gas path component models, gas is entering one or more inlets, then is subjected to some process affecting the gas conditions and/or composition before exiting  through one or more exits. The component inlets and exits usually correspond to engine stations, where specific gas conditions and/or compositions are specified or calculated for the primary gas flow of the cycle. Gas path component models share the following elements:

 

Primary gas flows enter the component via 1 or 2 component inlets.

Primary gas flows leave the component via 1 or 2 component exits.

Output parameters written to the output tables are defined through the Output tab sheet of the component

Secondary gas flows can enter or exit the component depending on the component model type.

Gas condition and composition is calculated for entry and exit stations. Only in special cases intermediate stations or locations exist where gas conditions and composition is calculated.

In most cases (and per default) only total temperature and pressure is required for the cycle calculation since enthalpy is used for the conservation of energy equations.

Static conditions (static temperature, static pressure, mach, velocity) can be calculated in most gas path components using the Exit static conditions box in the gas path component data entry window Design tab sheet.

Heat transfer can be modeled 2 ways:

oUsing the Heat sink tab sheet to connect to a Heat sink component for both steady-state and transient heat transfer to other components or the environment

oHeat soakage heat transfer using the Heat Soak tab sheet for heat transfer during transient only heating up or cooling down the gas path surrounding walls.

Volume effects using the Vol.dynamics tab sheet for representing volume effects during transients.