DEFINITION OF MODELS TO DETERMINE THE STATIC GAS PRESSURE AT THE INLET OF THE TURBINE’S ROTOR IN A LIFE-TIME MONITORING SYSTEM

C. Maravilla Herrera, S.V. Yepifanov

A life-time monitoring system is developed to predict the life-time of engines used in a gas pumping station. Five models are proposed to calculate the static gas pressure at the inlet of the turbine’s rotor; all the models are based on thermodynamic process taking place in the engine. Coefficients that include the not measured engine parameters are calculated by regression. The engine working cycle was simulated to generate data for model development and verification. Additional engine working cycle simulations were performed taking into account the influence of engine deterioration and operation conditions variation. Ten different defects for additional verification of the models were used. The model that describes the best the behavior of the gas pressure has been found.    

 

Key words: gas turbine engine, diagnostics, pressure, thermodynamic models, life-time monitoring.