| Abstract:To achieve a universal, scalable, flexible, and efficient modeling of the whole-engine performance of gas turbines, a
general-purpose whole-engine performance modeling method featuring topological self-construction was proposed. Based on object-
oriented concepts, a general component library was constructed using modular technology, and then the whole-engine model was formed by
associating components through topological interfaces. The whole-engine performance simulation models applicable to different types of
gas turbines were established. The iterative solution model of the multi-branch complex air system was coupled and embedded into the
whole-engine model as a component to replace the existing constant amount bleed air calculation method. A whole-engine performance
prediction platform with a user-friendly human-machine interface was developed using a cross-platform graphics development framework
and image visualization technology. A typical twin-spool gas turbine was used as a calculation case and compared with the experimental
results. The results show that for the outlet temperature of the power turbine, the maximum errors calculated using the constant bleed
method and the present coupling method are 3.36% and 1.31%, respectively. The calculation accuracy of outlet pressure is also improved
under most operating conditions. The proposed topological self-construction general-purpose whole-engine performance modeling method
can easily realize the construction of components and the topological self-construction of the whole-engine. After coupling with the second?
ary air system, the accuracy of the whole-engine performance simulation is significantly improved. |
