gsphelp  Component model fidelity

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gsphelp  Component model fidelity

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GSP component models may have different levens of fidelity. GSP's standard component models are all non-dimensional. Some custom component models are 1-dimensional.

Non-dimensional gas turbine component models use gas properties, averaged over the flow cross areas at entry and exit stations only. For example, combustor discharge gas properties are represesented with single pressures, temperatures, flow rates, Mach numbers, densities, fuel air ratio's etc. Pattern effects are not taken into account. For general (i.e. "whole system") gas turbine performance analysis, this assumption does not produce large inaccuracies.

 

Note that GSP component models do not need to be limited to non-dimensional or even 1-dimensional. Due to GSP's flexibility there is principally no limitation to modelling fidelity inside a component model. In some engine specific custom component libraries, dimensional models exist, such as the 1-dimensional combustor model which calculates combustion kinetics depending on some combustor geometrical properties.