Turbine Model Improvement for a Heavy-Duty Gas Turbine Plant Simulation PUBLIC ACCESS

[+] Author Affiliations
G. Crosa, M. Troilo

Università di Genova, Italia

A. Torelli

Ansaldo Energia, Genova, Italia

Paper No. 98-GT-171, pp. V005T15A018; 7 pages
  • ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education
  • Stockholm, Sweden, June 2–5, 1998
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7866-8
  • Copyright © 1998 by ASME


The interest of the world electricity market in the gas turbine and the gas-steam combined cycles has given a significant stimulus to the development of numerical simulations, useful in the detailed analyses of dynamic behaviour and off-design performance of the gas plant. This paper describes the latest improvements of a physical simulator built to predict the off-design and dynamic behaviour of single shaft, heavy-duty gas turbine plants. The analysis has been applied to the V94.2 and V64.3 models of the Ansaldo Energia production, that feature a compressor equipped with variable inlet guide vanes and an air bleed system cooled turbine. The mathematical model is non linear, based on the lumped parameter approach and described by a set of differential and algebraic equations. In particular, the next version presents a turbine model entirely rebuilt, based on a simplified, one-dimensional row by row calculation method. The equations system and the structure of the new code are here described, and the steady-state results of the dynamic model are compared with the results of an Ansaldo static code with a good correspond in the performance prediction. The model has been developed in the Matlab-Simulink® environment using some FORTRAN subroutines.

Copyright © 1998 by ASME
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