Abstract
The paper deals with the temperature and species concentration profile recoveries in semi-transparent media by means of inverse radiative methods using high-resolution emission spectroscopy data in order to study the basis of remote metrology of flames. One considers an axisymmetric one-dimensional absorbing–emitting object, the spectral intensities data of which stem from projections obtained by scanning a given cross section in a given line of sight. The inverse method uses a two-line ratio technique whose lines originated from the same lower and upper vibrational states. The study is specialized for carbon monoxide gas traces. The microscopic expressions of the absorption coefficient for the ro-vibrational lines is defined in terms of local species and temperature distributions including line profile with temperature-dependent half-width. The domains of validity of the mathematical assumptions necessary to render the inversion process feasible are discussed. The inversion technique proceeds either by means of a generalized Abel transform or by means of the conjugate-gradient method associated to the integral operator and its adjoint.
Published Version
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