Radiative Transfer in Combustion Systems: Fundamentals and Applications

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Chapter 4: Radiation Characteristics of Gaseous Combustion Products

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4.1 Introduction

4.2 Fundamental Concepts of Modern Radiation Physics

4.2.1 Fundamentals of gas molecular spectra

4.2.2 Microscopic radiative interactions

4.2.3 Relations between Einstein's probability coefficients and macroscopic coefficients

4.3 Line Models

4.3.1 Characterization of an isolated line

4.3.2 Total absorption by an isolated line

4.3.3 Line-by-line calculations of the absorption coefficient

4.4 Narrow-Band Models

4.4.1 Elsasser model

4.4.2 Statistical models

4.4.3 Decomposition-based narrow-band models

4.4.4 Nonhomogeneous gas models

4.5 Wide-Band Models

4.5.1 Box (top hat) model

4.5.2 Exponential wide-band model

4.5.3 Isothermal total band absorptance correlations

4.5.4 Exponential wide-band model for nonhomogeneous gases

4.6 Total Absorptance-Emittance Correlations

4.6.1 Database for CO2 and H2O

4.6.2 Empirical emittance-absorption correlations

4.6.3 Emipirical correlations for the total emittance of gaseous combustion products

4.7 Spectrum Integrated Hybrid Models for Total Emittance

4.7.1 SG and CK methods

4.7.2 Spectral line-based model

4.7.3 ADF and ADFFG approaches

4.8 Global Radiative Transfer Methods

4.8.1 Effective absorption coefficients

4.8.2 Mean absorption/emission coefficients

4.9 Concluding Summary Remarks

References

ISBN 1-56700-211-0