Design-Point Performance Simulation and Adaptation of a Gas Turbine Engine

Abstract

A design point simulation and adaptation of anindustrial GE LM2500+ gas turbine engine is presented. The design point is chosen when the engine runs steadily at operating point and close to the nominal design condition at 29MW power output. The targeted performance parameters are the fuel flow rate (FF), the compressor exit total pressure (P3), the compressor turbine total exit temperature (T8) and the total exit temperature from the compressor (T3). The values obtained from simulation using PYTHIA for the targeted performance parameters are 2.57%, -0.5%, -0.52% and 1.11% for gas path pressure deviations at thecompressor turbine, pressure deviations at the compressor, temperature deviations at thecompressor turbine, and temperature deviations at the compressor respectively. The average percentage deviation of the design valuesis over 1%. To achieve a better result, adaptation was carried out and the values obtained from simulation of the adapted values were -0.000035%, 0%, - 0.00009%, and 0%. These values match reasonably with the targeted overall percentage deviation of 1%.