e_H2O

版本 1.0.9 (5.0 MB) 作者: Miika Wallius
This script calculates standard emissivity, total emissivity and pressure correction for H2O mixtures with nitrogen or air.
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更新时间 2022/2/24

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Excel-script included in the downloadable package.
This script calculates standard emissivity, total emissivity and pressure correction for H2O mixtures with nitrogen or air. Pressure correction is calculated as total emissivity divided by standard emissivity. Both standard and total emissivities have been calculated using the HITEMP-2010 database.
Valid range:
  • T ≥ 450 K and T ≤ 3000 K
  • p_L ≥ 0.01 bar * cm and p_L ≤ 3000 bar * cm
  • p_E ≥ 0.05 bar and p_E ≤ 250 bar
This script extrapolates the emissivity if you go above or below these boundaries but these results are not reliable after certain point.
Example:
e = e_H2O(T, x_H2O, L, p_total, Output)
e = e_H2O(1000, 0.17, 100, 2, 'Standard')
Variables:
  • T is temperature in K
  • x_H2O is the mole fraction of H2O gas component in a gas mixture
  • L is the length in cm
  • p_total is total pressure of a gas mixture in bar
  • p_L is the pathlength in bar * cm
  • p_E is the equivalent pressure in bar
  • Output can be either 'Standard', 'Total' or 'Correction'.
Reference:
M. Alberti, R. Weber, M. Mancini. 2016. Re-creating Hottel's emissivity charts for water vapor and extending them to 40 bar pressure using HITEMP-2010 data base. Combustion and Flame, Vol 169, 2016, pages 141-153.

引用格式

Miika Wallius (2025). e_H2O (https://www.mathworks.com/matlabcentral/fileexchange/99004-e_h2o), MATLAB Central File Exchange. 检索时间: .

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版本 已发布 发行说明
1.0.9

Cleaned the code and comments.
1.0.8

Updated comments and Excel-file.
1.0.7

Updated description.
1.0.6

Updated description.
1.0.5

Cleaned the excel file.
1.0.4

Changed the image.
1.0.3

Excel-script included in the downloadable package.
1.0.1

Fixed comments.
1.0.0