アルカリ添加燃焼ガスのふく射吸収計測法における新しい関係式

概要

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Numerical studies on emission-absorption measurements of potassium-seeded kerosene-oxygen combustion gases were carried out. It was found that the ratio of the optical thicknesses at two arbitrary wing wavelengths of the potassium 766.5 nm resonance line was nearly equal to the ratio of the respective atomic absorption coefficients which were calculated based on the temperature measured by the emission-absorption method at the far-wing wavelength. Using the formula, the optical collision cross section as well as the pressure and Doppler broadenings of the potassium doublet could be predicted theoretically with an error of less than one percent. The optimal difference between the far-and near-wing wavelengths is 1.0-2.0 nm. The error in the above optical quantities and also the seed atom number density are insensitive to the near-wing wave-length.
一般社団法人日本機械学会の論文
1995-05-25