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research-article

CONJUGATE HEAT TRANSFER METHODOLOGY FOR THERMAL DESIGN AND VERIFICATION OF GAS TURBINE COOLED COMPONENTS

[+] Author and Article Information
Lorenzo Winchler

Department of Industrial Engineering, University of Florence, via di Santa Marta 3, 50139 - Florence, Italy
lorenzo.winchler@htc.unifi.it

Antonio Andreini

Department of Industrial Engineering, University of Florence, via di Santa Marta 3, 50139 - Florence, Italy
antonio.andreini@htc.unifi.it

Dr. Bruno Facchini

Department of Industrial Engineering, University of Florence, via di Santa Marta 3, 50139 - Florence, Italy
bruno.facchini@htc.unifi.it

Luca Andrei

Baker Hughes, a GE company, via Felice Matteucci 2 - 50127, Florence, Italy
luca.andrei@bhge.com

Alessio Bonini

Baker Hughes, a GE company, via Felice Matteucci 2 - 50127, Florence, Italy
alessio.bonini@bhge.com

Luca Innocenti

Baker Hughes, a GE company, via Felice Matteucci 2 - 50127, Florence, Italy
luca1.innocenti@bhge.com

1Corresponding author.

ASME doi:10.1115/1.4041061 History: Received July 17, 2018; Revised August 01, 2018

Abstract

Gas turbine design has been characterized over the years by a continuous increase of the maximum cycle temperature, justified by a corresponding increase of cycle efficiency and power output. In such way turbine components heat load management has become a compulsory activity and then, a reliable procedure to evaluate the blades and vanes metal temperatures, is, nowadays, a crucial aspect for a safe components design. In the framework of the design and validation process of High Pressure Turbine cooled components of the BHGE NovaLT16 gas turbine, a decoupled methodology for conjugate heat transfer prediction has been applied and validated against measurement data. The procedure consists of a conjugate heat transfer analysis in which the internal cooling system (for both airfoils and platforms) is modeled by an in-house one-dimensional thermo-fluid network solver, the external heat loads and pressure distribution are evaluated through 3D CFD analysis and the heat conduction in the solid is carried out through a 3D FEM solution. Film cooling effect has been treated by means of a dedicated CFD analysis, implementing a source term approach. Predicted metal temperatures are finally compared with measurements from an extensive test campaign of the engine, in order to validate the presented procedure.

Copyright (c) 2018 by ASME
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