Measurement of vibrational population distributions in a supersonic expansion of carbon monoxide

Journal Article · Sat Jul 01 04:00:00 EDT 1978 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.862345· OSTI ID:6878560

Bender, D J; Mitchner, M; Kruger, C H

The results of an investigation of the vibrational kinetics of carbon monoxide in a supersonic expansion are presented. In the experiments, arc-heated argon was seeded with CO (5--20%) and expanded to Mach numbers of 4.0 to 4.2. The vibrational state of the gas was determined by obtaining individual vibrational populations from the CO overtone emission spectra. The vibrational distribution at the nozzle exit was observed to be non-Boltzmann, in good quantitative agreement with the anharmonic model of vibrational relaxation.

• Research Organization: Lawrence Livermore Laboratory, Livermore, California 94550
• OSTI ID: 6878560
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 21:7; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
EMISSION SPECTRA
ENERGY LEVELS
EXCITED STATES
EXPANSION
FLUID FLOW
KINETICS
NOZZLES
OXIDES
OXYGEN COMPOUNDS
RELAXATION
SPECTRA
SUPERSONIC FLOW
VIBRATIONAL STATES