Linear Gas Turbine Modelling
In this chapter the engine test facility will now be described, and the signals used during the engine tests will be presented. Single-input, single-output s-domain models of the HP and LP dynamics will be estimated at different shaft speeds using frequency-domain techniques. The estimated models will be cross-validated using other models estimated from different tests at the same amplitude. The influence of the engine nonlinearity on the estimated models will be examined by analysing the frequency-domain residuals and the estimated models will be compared with the thermodynamic models at the different operating points. Discrete models will also be estimated in the time domain and their poles and zeros will be compared with those of the frequency-domain models by means of the impulse invariant transform.
KeywordsOperating Point Fuel Flow Input Amplitude Shaft Speed Inlet Guide Vane
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