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Flow-Field and Conjugate Heat Transfer of an Internally Air-Cooled Nozzle Guide Vane and Shrouds

[+] Author Affiliations
Leiyong Jiang

National Research Council Canada, Ottawa, ON, Canada

Paper No. GT2013-94274, pp. V03BT11A005; 10 pages
doi:10.1115/GT2013-94274
From:
  • ASME Turbo Expo 2013: Turbine Technical Conference and Exposition
  • Volume 3B: Heat Transfer
  • San Antonio, Texas, USA, June 3–7, 2013
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5515-7
  • Copyright © 2013 by Her Majesty The Queen in Right of Canada

abstract

In order to assess the life of gas turbine critical components, it is essential to adequately specify their aero-thermodynamic working environments. Steady-state analyses of the flow field and conjugate heat transfer of an internally air-cooled nozzle guide vane (NGV) and shrouds of a gas turbine engine at the baseline operating conditions are numerically investigated. A high-fidelity CFD model is generated and the simulations are carried out with properly defined boundary conditions. The features of the complicated flow and temperature fields are revealed. In general, the Mach number is lower and the temperature is higher on the NGV pressure side than those on the suction side. There are two high temperature spots on the pressure side, and the temperature across the NGV middle section is relatively low. These findings are closely related to the locations of the holes and outlets of the cooling flow passage, and consistent with the field observation of damaged NGVs. The obtained results provide essential information for the structural, material and life analyses of the NGV/shrouds assembly, and improvement of the cooling flow arrangement.

Copyright © 2013 by Her Majesty The Queen in Right of Canada

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