Demonstration of model based, off-line performance analysis on a gas turbine air compressor (GTAC)

Abstract

This paper presents a model based, off-line method for analysing the performance of individual components in an operating gas turbine. As with other studies, a least squares approach is employed. The component models are physics-based where possible. In its most general form, the method permits simultaneous inference of the combustor efficiency and stagnation pressure loss, the hot-end heat losses and associated heat transfer coefficients, the turbine inlet temperature and the turbine's isentropic efficiency. As part of this, combustion of unburnt fuel within the turbine is modelled. The method is demonstrated on a so-called 'Gas Turbine Air Compressor (GTAC)' test rig built by the group, a ..