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A conjugate heat transfer model for heat load prediction in combustion devices

Författare

Summary, in English

Different phenomena such as complex flow field and heat release by combustion are involved in the heat transfer process in combustion chambers. This paper concerns prediction of heat load and wail temperature in a gas turbine combustor by taking different phenomena into account. Two dimensional axi-symmetric models were used to model the flow field and combustion in a premised combustor with two different cooling schemes. The k-ε turbulence model and Eddy Dissipation Concept (EDC) were used for modeling turbulent flow and combustion, respectively. In the modeling of heat transfer through the walls, a conjugate heat transfer formulation was applied. The temperatures calculated by the models were compared with experimental data. The results showed that although worse agreement was found in some parts, however generally the trends of the temperature variations predicted very well. In addition, radiative heat transfer has been included in the study. The results showed that radiative heat transfer in simple and ribbed duct cooling schemes can increase the average inner wall temperature by to 33 and 40 K, respectively.

Avdelning/ar

Publiceringsår

2006

Språk

Engelska

Sidor

1813-1819

Publikation/Tidskrift/Serie

Collection of Technical Papers - 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings

Volym

3

Dokumenttyp

Konferensbidrag

Förlag

American Institute of Aeronautics and Astronautics

Ämne

  • Energy Engineering

Nyckelord

  • Gas turbine combustors
  • Eddy Dissipation Concept (EDC)
  • Ribbed duct cooling
  • Radiative heat transfer

Conference name

9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference Proceedings

Conference date

2006-06-05 - 2006-06-08

Conference place

San Francisco, CA, United States

Status

Published