Gas-Turbine Loading Schedule for Maximum Life of the Hot Gas Path Components PUBLIC ACCESS

[+] Author Affiliations
Stanislaw Bednarski

General Electric Co., Schenectady, NY

C. N. Shen

Rensselaer Polytechnic Institute, Troy, NY

Paper No. 70-WA/GT-2, pp. V001T01A002; 11 pages
  • ASME 1970 Winter Annual Meeting: GT Papers
  • ASME 1970 Winter Annual Meeting: GT Papers
  • New York, New York, USA, November 29–December 3, 1970
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-8004-3
  • Copyright © 1970 by ASME


The paper describes development of a computational procedure for determining the optimal firing temperature schedule during loading of the gas turbine. It is assumed that the temperature has to be increased in a pre-determined time in a way that will minimize thermal fatigue deterioration of the turbine hot gas path elements. The gas temperature is constrained to lie between certain time-dependent limits all through the transient. The maximum plastic strain in a given loading process is taken as a measure of parts deterioration. The calculations performed are for hollow, stationary airfoils of a gas turbine, but the method is easily adaptable to full profiles and rotational airfoils as well as non-turbine applications where temperature is to be altered while thermal shock is to be minimized. A numerical example is given for illustration of the method.

Copyright © 1970 by ASME
Topics: Gas turbines
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