Accession Number : AD0746704

Title :   Coupled Radiative and Vibrational Nonequilibrium in Carbon Dioxide,

Corporate Author : STANFORD UNIV CALIF DEPT OF AERONAUTICS AND ASTRONAUTICS

Personal Author(s) : Tripodi,Robert

Report Date : AUG 1970

Pagination or Media Count : 228

Abstract : The interaction of radiative and vibrational nonequilibrium in flows of carbon-dioxide gas was studied. Radiative transfer and vibrational rate equations were developed and then applied to acoustic problems in a plane-parallel geometry. A rigid-rotor-harmonic-oscillator model was assumed. Microscopic transfer equations are written for each of the three most important bands. The microscopic equations are then summed over all possible transitions to yield the microscopic transfer equations. It was found that the rate equations can be applied for any vibration-vibration transition or combination of such transitions. The linearized radiative transfer and vibrational rate equations specialized to a plane-parallel geometry are applied in conjunction with the linearized one-dimensional equations of gas dynamics. A study is made in particular of the acoustic waves caused in CO2 in a closed tube by a periodic input of radiation. Two special cases - the spectrophone and tuned case - are examined and possible experimental procedures are discussed. (Author)

Descriptors :   (*CARBON DIOXIDE, *ELECTRON TRANSITIONS), MOLECULAR ENERGY LEVELS, VIBRATION, INTERACTIONS, MATHEMATICAL ANALYSIS, REACTION KINETICS, GAS FLOW, MATHEMATICAL MODELS

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE