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Thermo Fluid Dynamic Analysis of a Gas Turbine Transition-Piece

[+] Author Affiliations
Riccardo Da Soghe, Cosimo Bianchini

Ergon Research s.r.l., Florence, Italy

Antonio Andreini, Lorenzo Mazzei

University of Florence, Florence, Italy

Giovanni Riccio, Alessandro Marini, Alessandro Ciani

GE Oil & Gas, Florence, Italy

Paper No. GT2014-25386, pp. V05CT18A006; 12 pages
doi:10.1115/GT2014-25386
From:
  • ASME Turbo Expo 2014: Turbine Technical Conference and Exposition
  • Volume 5C: Heat Transfer
  • Düsseldorf, Germany, June 16–20, 2014
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4573-8
  • Copyright © 2014 by ASME

abstract

The transition-piece of a gas turbine engine is subjected to high thermal loads as it collects high temperature combustion products from the gas generator to a turbine. This generally produces high thermal stress levels in the casing of the transition piece, strongly limiting its life expectations and making it one of the most critical components of the entire engine. The reliable prediction of such thermal loads is hence a crucial aspect to increase the transition-piece life span and to assure safe operations. The present study aims to investigate the aero-thermal behaviour of a gas turbine engine transition-piece and in particular to evaluate working temperatures of the casing in relation to the flow and heat transfer situation inside and outside the transition-piece. Typical operating conditions are considered to determine the amount of heat transfer from the gas to the casing by means of CFD. Both conjugate approach and wall fixed temperature have been considered to compute the heat transfer coefficient, and more in general, the transition-piece thermal loads. Finally a discussion on the most convenient heat transfer coefficient expression is provided.

Copyright © 2014 by ASME

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