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Research Papers: Gas Turbines: Combustion, Fuels, and Emissions

Metal Temperature Prediction of a Dry Low NOx Class Flame Tube by Computational Fluid Dynamics Conjugate Heat Transfer Approach

[+] Author and Article Information
Riccardo Da Soghe

Ergon Research srl,
via Panciatichi 92,
Florence 50127, Italy
e-mail: riccardo.dasoghe@ergonresearch.it

Cosimo Bianchini

Ergon Research srl,
via Panciatichi 92,
Florence 50127, Italy
e-mail: cosimo.bianchini@ergonresearch.it

Antonio Andreini

Department of Industrial Engineering
Florence (DIEF),
University of Florence,
via di Santa Marta 3,
Firenze (FI) 50139, Italy
e-mail: antonio.andreini@htc.de.unifi.it

Lorenzo Mazzei

Department of Industrial Engineering
Florence (DIEF),
University of Florence,
via di Santa Marta 3,
Firenze (FI) 50139, Italy
e-mail: lorenzo.mazzei@htc.de.unifi.it

Giovanni Riccio

GE Oil and Gas,
via Matteucci 2,
Florence 50100, Italy
e-mail: giovanni.riccio@ge.com

Alessandro Marini

GE Oil and Gas,
via Matteucci 2,
Florence 50100, Italy
e-mail: alessandro.marini@ge.com

1Corresponding author.

Contributed by the Combustion and Fuels Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received June 24, 2015; final manuscript received August 14, 2015; published online September 22, 2015. Editor: David Wisler.

J. Eng. Gas Turbines Power 138(3), 031501 (Sep 22, 2015) (7 pages) Paper No: GTP-15-1219; doi: 10.1115/1.4031384 History: Received June 24, 2015; Revised August 14, 2015

Combustor liner of present gas turbine engines is subjected to high thermal loads as it surrounds high temperature combustion reactants and is hence facing the related radiative load. This generally produces high thermal stress levels on the liner, 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 flame tube life span and to ensure safe operations. The present study aims at investigating the aerothermal behavior of a GE Dry Low NOx (DLN1) class flame tube and in particular at evaluating working metal temperatures of the liner in relation to the flow and heat transfer state inside and outside the combustion chamber. Three different operating conditions have been accounted for (i.e., lean–lean partial load, premixed full load, and primary load) to determine the amount of heat transfer from the gas to the liner by means of computational fluid dynamics (CFD). The numerical predictions have been compared to experimental measurements of metal temperature showing a good agreement between CFD and experiments.

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Figures

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Fig. 1

DLN1 modes of operation [15]

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Fig. 2

Computational domain

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Fig. 4

Boundary conditions for progress variable

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Fig. 5

Temperature fields on the meridional plane for different operation modes (see Fig. 1)

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Fig. 6

Velocity fields on the meridional plane for different operation modes (see Fig. 1)

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Fig. 7

Overall effectiveness profiles on the meridional plane

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Fig. 8

Overall effectiveness profiles on the meridional plane: sensitivity analysis

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