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Jet Engine Design Optimization Using a Knowledge-Based Master Model

[+] Author Affiliations
Ilya Tyapin

University of Agder, Grimstad, Norway

Marcus Sandberg, Michael Kokkolaras

Lulea University of Technology, Lulea, Sweden

Anders Lundbladh, Ola Isaksson

Volvo Aero Corporation, Trollhattan, Sweden

Paper No. GT2012-69309, pp. 41-47; 7 pages
  • ASME Turbo Expo 2012: Turbine Technical Conference and Exposition
  • Volume 7: Structures and Dynamics, Parts A and B
  • Copenhagen, Denmark, June 11–15, 2012
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4473-1
  • Copyright © 2012 by ASME


This paper presents a preliminary design optimization study of a jet engine structure using a knowledge-based master modeling approach. The objective function is derived based on input-output relationships of a cost-performance model, where specific fuel consumption, pressure loss and direct cost are considered. The advantage of this problem formulation is that it entails a single composite objective function that takes into account mass, structural characteristics, dynamic response and translates them to a direct operational cost function to be minimized. A fan-blade-off scenario is considered as the loading case in this paper. The loss of one fan blade during nominal operation causes a rotor imbalance and structural deformation.

Copyright © 2012 by ASME



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