Accession Number:

AD0625582

Title:

EMPIRICAL INFRARED ABSORPTION COEFFICIENTS OF H2O FROM 300K TO 3000K

Descriptive Note:

Technical rept.

Corporate Author:

GENERAL DYNAMICS SAN DIEGO CA CONVAIR DIV

Personal Author(s):

• Ferriso, C. C.
• Ludwig, C. B.
• Thomson, A. L.

Report Date:

1965-12-01

Pagination or Media Count:

62.0

Abstract:

A set of absorption coefficients for water vapor as functions of temperature has been empirically deduced from existing quantitative absorption and emission spectra between 1 and 22 microns. The basic assumption was made that, for optically thick gases, the curve of growth is given by a statistical model. The absorption coefficients were obtained for each vibration-rotation band by adjusting the band averaged line half widths and line spacings such that the integral of the absorption coefficients was equal to the known integrated intensity of the particular band at a given temperature. The effect of foreign gas broadening and non-resonant water molecule broadening was included. The present results are compared with independent theoretical and experimental results and the agreement is satisfactory.

Descriptors:

• *EXHAUST GASES
• *INFRARED RADIATION
• *WATER VAPOR
• ABSORPTION
• ABSORPTION SPECTRA
• BAND SPECTRA
• HIGH TEMPERATURE
• INFRARED SPECTROSCOPY
• INTEGRALS
• MOLECULAR ROTATION
• OPTICAL PROPERTIES
• ROCKET ENGINES
• VIBRATION

Subject Categories:

• Atomic and Molecular Physics and Spectroscopy
• Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE