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Evaluation of Weighted Sum of Grey Gases Coefficients for Combustion Gases Using Predicted Emissivities From High Resolution Spectroscopic Databases

[+] Author Affiliations
Mehdi Bahador

Siemens Industrial Turbomachinery AB, Finspong, Sweden

Bengt Sunden

Lund University, Lund, Sweden

Paper No. GT2008-51028, pp. 1791-1799; 9 pages
  • ASME Turbo Expo 2008: Power for Land, Sea, and Air
  • Volume 4: Heat Transfer, Parts A and B
  • Berlin, Germany, June 9–13, 2008
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4314-7 | eISBN: 0-7918-3824-2
  • Copyright © 2008 by ASME


A new set of weighted sum of grey gases coefficients have been predicted using new total emissivity databases for CO2 -H2 O mixtures and pure H2 O in different ranges of pressure. For this purpose, available high temperature spectroscopic databases were verified and suitable databases were selected. By line by line calculations, the total emissivity was calculated and the effects of total and partial pressures on this parameter were investigated. Finally, sets of total emissivity data on the wide range of temperatures and pressure path lengths were predicted which were used to estimate a new weighted sum of grey gases coefficients.

Copyright © 2008 by ASME



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