TUNABLE DIODE LASER MEASUREMENTS OF CO COLLISION WIDTHS IN COMBUSTION PRODUCTS AT ROOM TEMPRATURE
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Date
1981
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Ohio State University
Abstract
A tunable diode laser was used to record 19 fully resolved vibration-rotation absorption lines in the $\nu= 1 \leftarrow 0$ band of CO, and the room temperature collision widths of CO broadened by combustion gases were inferred. The combustion products of an atmospheric pressure methaneair flame were used, with equivalence ratios varying form 0.9 (fuel lean) to 1.4 (fuel rich). Results are presented showing the dependence of collision width on rotational quantum number and insensitivity to equivalence ratio. The collision widths of CO lines broadened by $H_{2}O$ at room temperature were also measured and combined with the data $^{1,2,3}$ for broadening by other combustion products ($N_{2}$, $CO_{2}$, CO, $H_{2}$, $O_{2}$) to compute collision widths of CO lines in combustion gases. Good agreement was obtained between the calculated line widths and those measured experimentally.
Description
$^{1}$ P. L. Varghese and R. K. Hanson, J. Quant. Spect. Rad. Transf. 24, 479 (1980). $^{2}$ R. H. Hunt, R.A. Toth and E.K. Plyler. J. Chem. 49, 3909 (1968). $^{3}$ J. P. Bouanich and C. Brodbeck, J. Quant. Spect. Rad. Transf. 13, 1 (1973).
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